Annual Report of ASRC 2011

Preface
Sadamichi Maekawa
Director General, Advanced Science Research Center

This issue contains the Annual Report of the Advanced Science Research Center (ASRC) activities
for the fiscal year 2011. This is the second year of the five-year project cycle. Included in the issue areseven research highlights and a summary of the research of our eleven research groups.
The Great East Japan Earthquake of March 11, 2011 has had a significant impact on the various
activities of the ASRC. Fortunately, the center suffered no fatalities. Due to the diligent efforts of
its members and, especially, because of the support and encouragement given by the colleagues andinstitutes in the domestic and international communities in the relevant research fields, by October
2011, most of the experimental facilities of the ASRC had been restored and by January 2012, those of
J-PARC.
For the restoration of the nuclear accident at the Fukushima Daiichi Nuclear Power Plant, the JAEA
has been significantly contributing by making full use of equipments, research institutions and man
power of JAEA. The ASRC members have been involving in technical contributions and serving in thegeneral support activities such as measurement of contamination in the field and telephone counseling.
In addition to the community service, the ASRC members have made solid progress in theirresearch. On behalf of the ASRC, I would like to express sincere appreciation to the generous support
and collaborations which the members had enjoyed in this fiscal year during the time the experimental
facilities of JAEA were not available due to the Earthquake. Needless to say, a great part of the
progress presented in this Report reflects this support and collaborations.

ASRC 1

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2 ASRC

Contents

Organization of Advanced Science Research Center ………………………………………………………………… 1
Research Highlights
Discovery of simple and versatile methods for spin current generation ……………………………………………… 2
H. Adachi, J. Ieda, S. Takahashi, K. Uchida, K. Ando, E. Saitoh, and S. Maekawa
Tailor-made graphene for spintronic and nanoelectronic applications ………………………………………………… 3
S. Entani, Y. Matsumoto, M. Ohtomo, P. V. Avramov, H. Naramoto, and S. Sakai
First observation of 239Pu NMR- A new frontier for the physics and chemistry of actinide compounds ……………………………………………… 4
H. Chudo, H. Yasuoka, G. Koutroulakis, S. Richmond, E. D. Bauer, J. D. Thompson, and D. L. Clark
Anomalous electrical resistivity associated with unconventional superconductivity in URu2Si2 ……………………… 5
N. Tateiwa, Y. Haga, T. D. Matsuda, Y. Onuki, and Z. Fisk
Magnetic-field-induced quantum critical behavior in the heavy-fermion superconductor CeCoIn5:
Co Nuclear Magnetic Resonence study ……………………………………………………………………………… 6
H. Sakai, S. E. Brown, S.-H. Baek, F. Ronning, E. D. Bauer, and J. D. Thompson

59

Local distribution of radioactive Cs deposited on plant and soil from Fukushima Daiichi Nuclear Power Plants …… 7
F. Sakamoto, T. Ohnuki, N. Kozai, S. Igarashi, S. Yamasaki, Z. Yoshida, and S. Tanaka
Li (Zn, Mn) As as a new generation ferromagnet based on a I-II-V semiconductor [REIMEI project] ……………… 8
Z. Deng, C.Q. Jin, Q.Q. Liu, X.C. Wang, J.L. Zhu, S. M. Feng, L.C. Chen, R.C. Yu, C. Arguello, T. Goko,
Fanlong Ning, Jinsong Zhang, Yayu Wang, A. A. Aczel, T. Munsie, T.J. Williams, G.M. Luke, T. Imai, T. Kakeshita,
S. Uchida, W. Higemoto, T.U. Ito, Bo Gu, S. Maekawa, G. Morris, W.Q. Yu, and Y. J. UemuraGroup Activities
Research Group (R.G.) for Condensed Matter Theory
R.G. for Molecular Spintronics……………………………………………………………… 9……………………………………………………………………………………… 10

R.G. for Mechanical Control of Materials and Spin Systems ………………………………………………………… 11
R.G. for Reactions Involving Heavy Nuclei………………………………………………………………………… 12

R.G. for Superheavy Elements ………………………………………………………………………………………… 13
R.G. for Actinide Materials Science …………………………………………………………………………………… 14
R.G. for Condensed Matter Physiscs of Heavy Element Systems …………………………………………………… 15
R.G. for Hadron Physics ……………………………………………………………………………………………… 16
R.G. for Bioactinide …………………………………………………………………………………………………… 17
R.G. for Radiation and Biomolecular Science ………………………………………………………………………… 18
R.G. for Spin-Polarized Positron Beam ……………………………………………………………………………… 19
Publication List………………………………………………………………………………………………………… 20

Appendix ………………………………………………………………………………………………………………… 26

ASRC 3

1 ASRC

Research Highlights

Discovery of simple and versatile methods for spin current
generation
H. Adachi1,2), J. Ieda1,2), S. Takahashi3), K. Uchida3), K. Ando3), E. Saitoh2,3,4), and S. Maekawa1,2)
1) R. G. for Condensed Matter Theory, ASRC, JAEA 2) CREST, JST. 3) Tohoku University4) R. G. for Mechanical Control of Materials and Spin Systems, ASRC, JAEA

Electronics is indispensable in our daily life in theinformation society. As the next-generation technology,“spintronics” has attracted global interest. The “spin current” isthe main ingredient of spintronics, and we have devised simple
and versatile methods of generating spin current.
As the name implied, electronics is the art of controllingelectrons in solids. The electron has two aspects: “charge” and“spin”. The charge is the origin of electricity, and its flow leads
to an electric (charge) current. On the other hand, the spin gives
rise to magnetism and its flow is called a spin current. To date,developments in the field of electronics have been based solely
on the charge current. Spintronics aims to improve the current
technology by harnessing both charge and spin currents equally.
It has been recognized, however, that it is quite a hard task toutilize spin currents unlike the case of charge currents. In thiscontext, we have discovered new methods for generating spincurrents.
Our method employs the spin transfer without chargetransfer from a ferromagnet into an attached nonmagnetic
conductor (metal or semiconductor), whose process is driven
by the magnetization dynamics in the ferromagnet. When amagnetization in a ferromagnet is excited, it starts precession.
Since a nonmagnetic conductor acts as a spin absorber, attachinga nonmagnetic conductor to the excited ferromagnet results
in an emission of a certain amount of spins into the conductor
as a result of the angular momentum conservation. Therefore,
the spin current is generated in the nonmagnetic conductor
without charge transfer across the interface of the ferromagnet/
nonmagnetic conductor bilayers. This is a simple and versatilemethod because any perturbation exciting the magnetization
dynamics enables this new type of spin current generation. We
have demonstrated that this is indeed the case in the following
ways.
First, we have shown that the spin current can be generated
by sound waves. In a hybrid structure of a nonmagnetic metal(Pt) and an insulating ferromagnet (Y3Fe5O12) as schematicallyshown in Fig. 1, a propagating sound wave is generated bya piezoelectric actuator attached to the ferromagnet. The
sound wave then excites magnetization dynamics through themagneto-elastic coupling, thereby injects a spin current into
the nonmagnetic metal. The spin current obtained is converted
into an electric current via the spin-Hall effect. Thus, we haveestablished a new route for generating spin and electric currents
by ubiquitous sounds. This mechanism will be useful for
constructing new spintronic and energy-saving devices.
Second, we have succeeded in injecting spin currents into
semiconductors with a very high efficiency (103 times larger
than before). So far, any attempt to generate spin currents insemiconductors has relied on the spin-polarized charge transferfrom ferromagnets into semiconductors. However, the prevous
attempts suffer from the so-called impedance mismatch problem
arising from the extreme difference of the electric conductivity
between ferromagnets and semiconductors. Using a hybrid
structure of a semiconductor (GaAs) and a ferromagnet(Ni81Fe19) shown in Fig. 2 and by applying a microwave to theferromagnet, we have shown that a high efficiency spin injection
into GaAs is possible. This technique relies purely on the spintransfer caused by microwave-excited magnetization dynamics,
and is free from the impedance mismatch problem that arises in
the charge transfer. Since semiconductors are basic materials forconventional electronic devices, the impact of this finding on the
spintronics community is astonishingly large.
A variety of such high-efficiency methods for spin current
generation can make progress in spintronics, which in turncontributes to the development of energy-saving society as
spintronics offers a route to reduce power consumption of solidstate logic devices.

Fig. 1 Schematic illustration of the device structure to realize
the new way of spin current generation by sound waves.

Fig. 2 Schematic illustration of the device structure to realize
the new way of spin current generation by microwaves.
References[1] K. Uchida et al., Nature Materials 10, 737 (2011).
[2] K. Ando et al., Nature Materials 10, 655 (2011).

ASRC 2

Research Highlights

Tailor-made graphene for spintronic and nanoelectronic
applications
S. Entani, Y. Matsumoto, M. Ohtomo, P. V. Avramov, H. Naramoto, and S. Sakai
R. G. for Molecular Spintronics, ASRC, JAEA

Graphene proved interesting for nanoelectronics andspintronics. There have been plenty of attempts to fabricate
graphene-based devices. To realize the spintronic andnanoelectronic devices using graphene, particular concerns
should be addressed to the following two issues: The first one
is to form the well-defined interface between graphene andmetal electrodes. The elucidation and control of the injection/
detection processes of spin-polarized carriers through thegraphene/metal interface are essential for designing device
properties [1]. The second one is to synthesize graphene filmwith large area and uniform number of carbon layer. The
most conventional and commonly used fabrication method ofgraphene is the micromechanical exfoliation of graphite [2].
However, this process cannot satisfy above requests due to thefollowing reasons: limited sizes with large distribution in shapeand layer number as well as the contamination and impurities
introduced during the fabrication process. Ultrahigh vacuum
chemical vapour deposition (UHV-CVD) [3] can be a promisingalternative method. The UHV-CVD growth makes it possible
to prepare an epitaxial graphene film on the metal surface withlarge area and uniform layer-number of carbon sheet. In UHVCVD, it is considered that graphene grows by the dissociationand polymerization of hydrocarbon molecules as precursors
on the catalytic metal surfaces. This allows us to control the
crystallinity by the growth condition.
In this study, the process of the UHV-CVD growth ofgraphene on Ni(111) thin films and with benzene as a precursor
are investigated using in-situ reflection high energy electron
diffraction (RHEED) and Auger electron spectroscopy (AES)[4]. Figure 1 shows changes in the RHEED specular beam
intensity and the Auger intensity ratio, IC/INi, of the C KLL peak,IC, and Ni LMM peak, INi as a function of benzene exposure. It
is successfully shown that SLG and bilayer graphene (BLG) canbe synthesized by the control of benzene exposure in the range
in 10−105 langmuirs (L, 1 L = 10−6 Torr·sec) reflecting a change
in the growth rate by three orders of magnitude in between thefirst and second graphene layer on the Ni(111) surface.
The electrical states of the transferred graphene sheets on
the SiO2 substrate are examined from the positions of the G
peak and the 2D peak (Pos(G) and Pos(2D), respectively) in the
Raman spectra. Figure 2 shows a plot of Pos(2D) vs. Pos(G)obtained from the randomly selected areas on the graphenesheets prepared with different benzene exposures and on the
exfoliated SLG sheet. The linear increase of Pos(2D) with
Pos(G) as seen in exfoliated SLG is reflective in the degree ofhole doping, and the wide distribution of the peak positions,
1580−1592 cm−1 in Pos(G) and 2687−2704 cm−1 in Pos(2D),
is due to the non-uniformity of the unintentional hole doping[1]. In case of the graphene sheets prepared by UHV-CVD,
the Pos(G)-Pos(2D) relationship deviates from the linear one
and there are rough tendencies to shift the G peak position tolower energy and the 2D peak position to higher energy withincreasing exposure. These changes of the G and 2D peak
positions with exposure are attributed to the increase of the layer
3 ASRC

number. As a striking feature, it is found that the distribution ofPos(G) and Pos(2D) becomes extremely small in SLG and BLG
sheets (62 L and 1.1 × 105 L, respectively). These graphenesheets are presumed to be hole-doped judging from Pos(G) andPos(2D) which are rather close to the linear relationship in the
exfoliated SLG sheet. It can be said that the uniformity of thedoping degrees in graphene can be improved remarkably byusing UHV-CVD under the well-controlled exposure conditions
instead of micromechanical exfoliation.
The present results demonstrate that the UHV-CVD method
enables a tailor-made growth of graphene which would benecessary for controls of spin transport properties including
realization of a long spin diffusion length in the graphene-based
spintronicdevices beyond the limits of exfoliated graphene.

Fig. 1 (upper) Change in the RHEED specular intensitiesand (lower) plot of the AES intensity ratio, IC/INi, as afunction of benzene exposure.

Fig. 2 Pos (2D) as a function of Pos (G). The symbols ■ , ● ,▲ , ▼ and ◆ denote the data obtained from the different
areas on the graphene sheets prepared at 25 L, 62 L, 5.6
× 104 L, 1.1 × 105 L exposures and on the exfoliated SLG
sheet, respectively.
References[1] S. Entani et al., J. Phys. Chem. C 122, 345 (2010).
[2] K. S. Novoselov et al., Proc. Natl. Acad. Sci. USA 102,
10451 (2005).
[3] C. Oshima et al., J. Phys. Condens. Mater. 9, 1 (1997).
[4] S. Entani et al., J. Appl. Phys. 111, 064324 (2012).

Research Highlights

First observation of 239Pu NMR−A new frontier for the physics and chemistry of actinide compounds
H. Chudo1,2), H. Yasuoka1,2), G. Koutroulakis2), S. Richmond2),
E. D. Bauer2), J. D. Thompson2), and D. L. Clark2)
1) R.G. for Mechanical Control of Materials and Spin Systems, ASRC, JAEA
2) Los Alamos National Laboratory

Spin Echo Intensity (a. u.)

From a least-square ﬁt of the slope, the gamma value in PuO2
has been determined to be 239γn(PuO2) = 2.856 ± 0.001 MHz/T.
We have tried to obtain the value of T1 using the inversion
recovery method. As is expected from the singlet ground stateof Pu4+, the T1 value is expected to be extremely long at low
temperatures. Actually, we could not obtain the correct value of
T1 by the inversion recovery method. Nevertheless, we could
place the best estimate of 100 s at 4 K. This long T1 assures thatthe observed NMR is really associated with Pu4+ in PuO2.
The gamma value obtained here is exclusively for the caseof 239Pu in PuO2 and it is not necessarily the “bare” gamma
value of 239Pu. In order to estimate bare gamma value, we haveused the free ion value of the hyperﬁne coupling constant Ahf =283.5 T/μB [3] to estimate the value of NMR shift (K) in PuO2.
Combined with the susceptibility data, χo=5.36×10-4 emu/mol, K
is obtained to be +24.8% using a relation of K= (χo·Ahf) /(NA·μB).
Since the bare gamma vale γn is expressed as 239γn= 239γ(PuO2)/(1+K), we have the value of 2.29 MHz/T, corresponding to anuclear moment of 0.15 μN for 239Pu.
We also performed measurements on a sample known to
be not fully oxidized, i.e., PuO2-x. In Fig. 1(b) a 239Pu NMR
spectrum is shown, taken by sweeping the external magnetic
field (Ho= 4.45 − 5.05 T) at f = 12.1 MHz and T = 4 K. The
spectrum consists of two lines with NMR shifts K ≈ 11% and K≈ 19%, respectively. Although we do not have a ﬁrm conclusion,
we infer that those lines are associated with either Pu atoms
nearby oxygen vacancies in PuO2-x or Pu atoms in an α-Pu2O3
impurity phase. Controlled experiments are necessary for adeﬁnitive conclusion; nevertheless, this observation assures that
the Pu NMR spectrum is sensitive to the oxygen coordinationand can provide an atomic-scale fingerprint of the oxidation
process. This is of particular importance for understanding theconsequences of long-term storage of plutonium.
Spin Echo Intensity (a. u.)

We present here a success story of the ﬁrst observation of 239Pu
Nuclear Magnetic Resonance (NMR) signal [1]. This finding
puts an end to a ﬁfty-year long search for Pu NMR, and opens
new frontiers for the study of plutonium in the fields of solidstate physics, chemistry, and nuclear materials science.
There are two main reasons why 239Pu NMR has remained
elusive. First and foremost, in atoms with unpaired f electrons,
like rare earths and actinides, an extremely strong hyperfine
interaction between electron and nuclear spins gives rise
to a large internal magnetic field at the nuclear site. As aconsequence, the resonance frequency is shifted by several
orders of magnitude and the nuclear spin-lattice relaxation
time (T 1) becomes exceedingly short, rendering any NMR
measurement on Pu-based compounds very challenging.
Secondly, there is no accurate account of the 239Pu nuclear
moment, hence neither of the relevant value of nuclear
gyromagnetic ratio (gamma value).
In order to overcome above difficulties we have selected
a compound in which Pu ion is in tetravalent state, andcoordinated in a cubic local symmetry. The best material wehave selected is PuO2 where Pu ions should be Pu4+ (5f4, 3H4)
and the ground state in a cubic crystalline filed is Γ1 singlet.
Since the magnetic excited state Γ4 is located 123 meV higher
in energy, the Pu4+ ion in PuO2 should be almost nonmagnetic
below room temperature. As for the problem of undetermined
gamma value, we have just made use of the way of scanningexternal filed from the minimum to the maximum expectedvalues at a constant frequency.
A high purity PuO2 powder sample which was prepared bynitric and anion exchange follows by oxalate precipitation wasused [2]. The 239Pu abundance is about 94%, and 48.7 mg of
powder PuO2 was mixed 24 mg stycast epoxy and casted thesample with a Teﬂon mold. The typical sample dimensions were
1.5 × 1.5 × 9 mm3. All our NMR experiments were performed
using a superconducting, highhomogeneity, variable 8 Tesla
magnet. The low temperature environment was provided bya standard Variable Temperature Insert 4He flow cryostat. A
bottom-tuned NMR probe was used, with variable tuning andmatching capacitors mounted near the NMR coil allowing
for wide frequency coverage. The data were recorded with acommercial NMR spectrometer. All experiments have been
executed at Los Alamos National Laboratory (U.S.A.).
The ﬁrst ﬁeld-swept scan was made at 16.51 MHz and 3.95K.
The external ﬁeld was scanned from 3 T to 8 T to cover wide
range of the gamma values with 0.06 T step. In this scan wehave used t90 = 3 μs and t180 = 6 μs pulse width for exciting andrefocusing RF pulses, respectively. The time duration between
the ﬁrst and the second pulse (τ) was 60 μsec and the repetition
time of 1 s was used. In the Fig. 1(a), one can observe a clear
spin-echo signal at 5.8 T. This is the first observation of 239Pu
NMR signal.
In order to determine the gamma value in PuO2 precisely,
the NMR spectrum has been measured at several deferent
frequencies and a frequency−ﬁeld diagram has been constructed.

(a)

5.72

5.76 5.80 5.84
External Field (T)

(b)

6.2

6.4

6.6

6.8

External Field (T)Fig. 1 239Pu NMR (Spin-echo) ﬁeld swept spectra taken at 16.51
MHz and 3.95 K. (a): Pure PuO2, (b) NonstoichiometricPuO2-x.
References[1] H. Yasuoka, H. Chudo et al., Science 336, 901 (2012).
[2] Materials and Methods are available as supplementarymaterial in Science Online.
[3] B. D. Dunlap et al., in Actindes, (Academic Press, New
York, 1974), 1, p. 237 and references therein.
[4] G. Raphael et al., Solid State Communications 6, 383 (1968).

ASRC 4

Research Highlights

Anomalous electrical resistivity associated with unconventional
superconductivity in URu2Si2
N. Tateiwa1), Y. Haga1), T. D. Matsuda1), Y. Onuki2), and Z. Fisk1, 3)
1) R.G. for Actinide Materials, ASRC, JAEA
2) Osaka University 3) University of California

Unconventional superconductivity (SC) in the uranium
compound URu 2Si 2 below T sc = 1.4 K has attracted muchattention due to its novel superconducting properties [1]. The
SC has a strong relation with the electronic state of an unknown
ordered phase whose transition temperature is T0 = 17.5 K atambient pressure. The nature of the ordered phase known as“hidden order” (HO) has not been resolved for more than
25 years. The low temperature physical properties of URu2Si2
are very sensitive to the sample quality. We have grown a highquality single crystal of URu2Si2 to eliminate impurity effects[2]. In this study, we have investigated the electrical transport
under high pressures [3].
Figure 1 shows the pressure-temperature phase diagram in
URu2Si2 [3]. The ground state is changed from the HO to theantiferromagnetic (AF) state at a first order phase transitionpressure Px. The bulk superconducting state exists only below
Px. We have measured the electrical resistivity ρ under highpressure. The electronic property of the ordered state is reflected
through the scattering process of electron. For example, theusual electron-electron scattering gives the T 2-term in theresistivity. We focus on the pressure effects on T sc and theelectrical transport. We analyse the temperature dependence of2
ρ using the expression ρ = ρ0 + α1T + α2T , assuming that theresistivity ρ consists of a T-linear resistivity from the unusualscattering process of electron and the usual T 2-term.
We find a linearity between α1/α2 and Tsc as shown in Fig. 2.
The pressure dependence of the coefficient of α2 is very weak.
The value of Tsc depends primarily on the coefficient α1. Thissuggests that the anomalous electron scattering derives theunconventional SC in the hidden order phase. This finding
provides a key for further studies on the hidden and SC states in
URu2Si2 [3].

Fig. 1 Temperature pressure phase diagram in URu2Si2.
“SC” indicates the superconducting phase.

5 ASRC

Fig. 2 Relation between α 1 /α 2 for the resistivity ρ andsuperconducting transition temperatures Tsc, where the α1and α2 are obtained by the fitting to ρ0+α1T+α2T 2.
Similar correlation between the T-linear resistivity and Tsc
has been found in the organic superconductors, the iron pnictide
superconductors and the high-Tc cuprate superconductors [4].
This correlation may be a universality in the unconventional
superconductors. In these systems, the T-linear resistivity
appearing around a magnetic phase boundary has beeninterpreted as manifestation of quantum criticality.
So far, many theoretical models have been proposed for
the HO phase. Generally, the peculiarity of the HO phaseoriginating from the multipolar degree of freedom in the 5f
electrons has been stressed but no clear experimental evidence
was found. Unidentified mysterious phases have been reported
near the SC phase such as “pseudo-gap phase” in the cuprate
superconductors. We note recent studies on the mysterious
phases from the view point of electronic nematicity [5].
Interestingly, the symmetry breaking of the electronic state
has been revealed also in the HO phase by the collaboration
work between our research group and Kyoto University [6].
The result as well as the present finding suggests that the HO
phase in URu2Si2 shares the universality inherent to the strongly
correlated electron superconductors near quantum criticality.
Our studies provide a different point of view for theories of the
HO phase. Future studies on the phase will contribute to theunderstanding of all strongly correlated electron systems.
References[1] T. T. M. Palstra et al., Phys. Rev. Lett. 55, 2727 (1985).
[2] T. D. Matsuda et al., J. Phys. Soc. Jpn. 80, 114710 (2011).
[3] N. Tateiwa et al., Phys. Rev. B 85, 054516 (2012).
[4] L. Taillefer, Annu. Rev. Condensed Matter Phys. 1, 51(2010).
[5] J-H. Chu et al., Science 329, 824 (2010).
[6] R. Okazaki et al., Science 331, 439 (2011).

Research Highlights

Magnetic-field-induced quantum critical behavior in the heavy-fermion
superconductor CeCoIn5: 59Co Nuclear Magnetic Resonance study

8
10

6

CeCoIn5

59Co-NMR

H0 ( T )The need to determine the nature of spin fluctuations andtheir possible relationship to unconventional superconductivity
in heavy fermion systems, and strongly correlated systems more
broadly, has posed a long-standing problem. The intermetallic
compound CeCoIn5 with a tetragonal crystal structure is anabsolutely fascinating material. The superconducting criticaltemperature T c for this compound is 2.3 K, which is thehighest among Ce-based heavy fermion systems. Moreover, it
exhibits the various physical phenomena such as heavy fermion
behavior (i.e. large electronic specific heat coefficient γ ~1000 mJ mol-1 K-2), anisotropic superconductivity, magneticfield-induced spatially-modulation of superconductivity withcoexistence of antiferromagnetism (this is animatedly discussed
if it may be Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state),quantum criticality and so on. These rich physical properties
in CeCoIn5 are thought to occur in the background of strong
antiferromagnetic correlations. Nuclear magnetic resonance(NMR) technique is one of the most suitable tools to evaluate
such spin dynamics microscopically, while the usual transportmeasurements cannot estimate it directly. We have preformed
the 59Co-NMR measurements for CeCoIn 5 as functions ofexternal magnetic fields (H0) and temperatures (T), in orderto evaluate how the antiferromagnetic spin fluctuations
develop toward the anisotropic superconductivity at the lowest
temperatures. Since the perturbation energy is quite small of~10-5−10-2 meV in NMR spectroscopy, NMR relaxation rate
1/T1 responds promptly to the dynamical susceptibility of theelectronic states. In general, NMR 1/T 1 corresponds to thesquare of hyperﬁne coupling constant (Ahf2) times Σq Imχ(q, ω),
the latter of which is the imaginary part of momentum space(q)-summed electronic dynamical susceptibility. Although Ahf
is usually T-independent, the Ahf for 59Co nuclei in CeCoIn5 has
been found to be T-dependent for 59Co from our previous work[1]. This T-dependent Ahf(T) has been used for the successive
detailed analyses based on the uniform dynamical susceptibility
by Ce 4f electrons. For example, in the case of normal metal(i.e. Fermi-liquid state), (T 1 T) -1 /A hf 2 is known to become
constant, and its constant value corresponds to the enhancementof electronic correlations.
In the case of H0 well above the superconducting criticalﬁeld Hc2(0)~ 5 T parallel to the c-axis (see the 8 T data in Fig.
1), the normalized (T1T)-1/ Ahf2(T) shows a constant value inthe lowest temperatures below ~1 K. As the external fields
decreases toward to 5 T, (T1T)-1/ Ahf2(T) shows a critical increasein the lowest temperatures [2]. As shown in Fig. 1, this criticalbehavior of 1/T1 is well explained by the theoretical modelof antiferromagnetic spin fluctuations, i.e. self-consistentrenormalization (SCR) theory, which has been applied
successfully to characterize the nature of spin fluctuations inmany heavy fermion materials [3]. In addition, it is found thatthe obtained parameters from the fit to 1/T1-data can explain
the H0-dependence of macroscopic physical properties suchas resistivity, speciﬁc heat, and thermal expansion in the same
theoretical framework.

( T 1 T -1 ) / A2hf ( T ) ( arb. units )H. Sakai1,3), S. E. Brown2,3), S.-H. Baek3), F. Ronning3), E. D. Bauer3), and J. D. Thompson3)
1) R. G. for Condensed Matter Physics of Heavy Element Systems, ASRC, JAEA
2) University of California 3) Los Alamos National LaboratoryFL

H0 // c

５
SC

4

０
2.3

T(K)

2
0
0.1

1

10

T(K)
Fig. 1 T-dependence of the normalized (T1T)-1/Ahf2(T) for 59CoNMR in CeCoIn5 under the external fields of 8, 6.4,
and 5 T parallel to c-axis. The solid curves represent
the calculated curves based on the theoretical model ofantiferromagnetic spin ﬂuctuations [2]. The inset shows
the schematic H 0-T phase diagram in the case of H 0
parallel to the c-axis.
Thus, our results have conclusively proved that thequantum critical behavior near Hc2(0) for the heavy fermion
superconductor CeCoIn5 is caused by the antiferromagnetic
spin fluctuations. Such kind of field-tuned criticality may
exist even in the high-Tc cuprates, in which antiferromagnetic
spin fluctuations develop well, although it cannot be verified
easily since the Hc2(0) for these superconductors is extensively
higher. Perhaps, this work may provide small-scale, but really
identiﬁable values for building a new theory to design for a newhigher-Tc material.
References[1] H. Sakai et al., Phys. Rev. B 82, 020501(R) (2010).
[2] H. Sakai et al., Phys. Rev. Lett. 107, 137001 (2011).
[3] S. Kambe et al., J. Low Temp. Phys. 108, 383 (1997).

ASRC 6

Research Highlights

Local distributions of radioactive Cs deposited on plant andsoil from Fukushima Daiichi Nuclear Power Plants
F. Sakamoto1), T. Ohnuki1), N. Kozai1), S. Igarashi1,2), S. Yamasaki1), Z. Yoshida3), and S. Tanaka4)
1) R. G. for Bioactinide, ASRC, JAEA 2) Ibaraki University 3) JAEA
4) NPO Radiation Safety Forum

After the accident of Fukushima Daiichi Nuclear Power
Plant (FDNPP), the fallout radioactive Cs were dispersed
from FDNPP to ocean [1,2] and land [1]. Some of the released
radioactive Cs was deposited on the ground of the area locatednorth-west direction from FDNPP. The spatial concentration
distribution and depth profiles of radioactive Cs were measured
to estimate dose rate and to estimate the fate in the terrestrial
environment.
For the estimation of migration of radioactive Cs, chemical
states of the deposited radioactive Cs should be clarified.
We first sampled the soils, plants, and paddy area at Iitatemura, Fukushima on June, 2011 to estimate the chemical
states of radioactive Cs deposited [3]. We have measured local
distribution on/in trees, plants, and surface soil beneath theplants using autoradiography analysis.
The trees sampled were Cryptomeria japonica, Torreya
nucifera, and Prunus mume. The grass at meadow area and rice
(Orysa sative) stubble at paddy area were collected with soil
attached around roots. The local distribution of radioactive Cs
was measured by autoradiography technique using Bioimaging
analyzer of BAS2500 (Fuji Film, Japan). The samples were notpretreated for the autoradiography analysis. The shape and colorof the samples were recorded by optical photograph.
The autoradiography images of Torreya nucifera is shown in
Fig. 1 along with optical photograph. The black points in the
autoradiograph image showed the area of radioactive Cs was
accumulated. The black spots sized about 2 mm were distributedon the branch and leaves of Torreya nucifera, indicating thatradioactive Cs was distributed heterogeneously on the branch
and leaves of trees. The area of red circles in Fig. 1 showed noblack spot on the branch and the leaves. The optical photographshowed that the color of the leaves in the red circles sickly
green. This indicates that the branch and leaves in the red circles
were grown in this year probably after the FDNPP accident.
These results suggest that only small fraction of deposited Cs
may be transported to new branch and leaves grown after theaccident. Little fraction of the deposited radioactive Cs wastransported from the grown branch and leaves to new bornones. Similar results were obtained for Cryptomeria japonica
and Prunus mume. By the treatment of the branch and leaves
with a 1 M CH3COOH solution showed approximately 5% of
the radioactive Cs was dissolved from the branch and leaves
into the acetic acid solution, indicating that radioactive Cs wastightly associated with the branch and leaves.
The autoradiograph image of grass at the meadow (Fig. 2)
indicated the black spots were distributed on the grass above theground level (yellow dashed line), but not with soil root beneaththe ground level (red circles). The black spots on the stubble ofrice showed similar distribution. These results indicated that theradioactive Cs was deposited on the grass and the rice plant. In
addition, the ratio of the radioactive Cs penetrated into soil layer
by weathering was very small for two months after accident.
These results indicate that trees and plant would be the reservoirof the fallout Cs and function for retardation of the fallout Cs
7 ASRC

migration with rain water.

Fig. 1 Autoradiograph image (a) and optical photograph (b) of
Torreya nucifera sampled at Iitate, Fukushima, about 30
km from FDNPP.

Fig. 2 Autoradiograph image (a) and optical photograph (b)of cross section of meadow grass with soil beneath thegrass.
References[1] M. Chino et al., J. Nucl. Sci. Technol. 48, 1129 (2011).
[2] A. Omoto, Prog. ICAPP2011 Special Japan Session:presentation (2-6 May, 2011, Nice, France).
[3] F. Sakamoto et al., Trans. Atomic Energy Soc. Japan, 11, 1(2012) (in Japanese).

Research Highlights

Li (Zn,Mn) As as a new generation ferromagnet based on a
I-II-V semiconductor [REIMEI project]
Z. Deng1), C.Q. Jin1), Q.Q. Liu1), X.C. Wang1), J.L. Zhu1), S. M. Feng1), L.C. Chen1), R.C. Yu1), C. Arguello2), T. Goko2),
Fanlong Ning2,3), Jinsong Zhang4), Yayu Wang4), A.A. Aczel5), T. Munsie5), T.J. Williams5), G.M. Luke5), T. Imai5),
T. Kakeshita6), S. Uchida6), W. Higemoto7), T.U. Ito7), Bo Gu8,9), S. Maekawa8,9), G. Morris10), W.Q. Yu11), and Y. J. Uemura2)
1) IOP, Beijing 2) Columbia University 3) Zhejian University 4) Tsinghua University5) McMaster University 6) University of Tokyo 7) R. G. for Condensed Matter Physics of
Heavy Element Systems, ASRC, JAEA 8)R. G. for Condensed Matter Theory, ASRC, JAEA
9) CREST, JST 10)TRIUMF 11) Renmin University

Ferromagnetic systems obtained by doping transition metals
into semiconductors [1] have generated extensive studies
since early 1990's [2] because of their potential use for spinsensitive electronics (spintronics) devices. In prototypicalsystems based on III-V semiconductors, such as (Ga,Mn) As
and (In,Mn) As, substitution of divalent Mn atoms into trivalent
Ga or In sites leads to severely limited chemical solubility,
resulting in chemically metastable specimens available only as
thin films [1]. Their materials quality exhibits high sensitivity
on preparation methods [3], and self-doping of hole carriers
via substitution prohibits electron doping. To overcome these
difficulties, Masek et al. [4] theoretically proposed systems
based on a I-II-V semiconductor LiZnAs, where magnetism due
to isovalent (Zn,Mn) substitution may be decoupled from carrier
doping with excess/deficient Li concentrations.
Recently we succeeded in synthesizing bulk poly-crystal
specimens of Li1+y(Zn1-xMnx) As and Li1+y(Cd1-xMnx)P at theInstitute of Physics (IOP) of Beijing [5]. As shown in Fig. 1 for
Li (Zn, Mn) As, these systems exhibit ferromagnetism with Tc
up to 50 K in nominally Li-excess (y = 0.05–0.2) compoundswith Mn concentrations x = 0.03−0.15, and a very low coercive
field (30−100 Oe) promising for spin manipulations. Resistivity
show metallic conductivity for Li deficient and Li excess
systems. The Hall resistivity exhibits anomalous Hall term
due to spontaneous magnetization, and, to our surprise, p-typecarriers in Li excess systems. This is likely due to excess Li
substituting the Zn or Cd site and forming an acceptor.
We performed MuSR measurements in Li1.1(Zn0.95Mn0.05)As,and confirmed static magnetic order below Tc ~ 27 K, withthe full volume fraction at T = 0 [5]. In a plot of the muon
spin relaxation rate (which represent the ordered moment size
times concentration) and Tc, the results from Li (Zn,Mn) As
and (Ga,Mn) As [6] exhibit a common slope, which suggests a
common ferromagnetic interactions. These results are consistent
with Local Density Approximation and quantum Monte-Carlocalculations by Gu and Maekawa.
The availability of bulk specimens allowed NMR studies inthese two systems with signals from 7Li and 31P nuclei. The Li
NMR in Li (Zn,Mn) As exhibits sharp peaking of the relaxation
rate 1/T1 at the ferromagnetic transition temperature TC. The
observed scaling of 1/T 1T with 1/(T+T W), appearing with apositive TW in a wide temperature region above TC, suggests an
influence of antiferromagnetic coupling between Mn moments
located in nearest-neighbor geometry.
As shown in Fig. 2, ferromagnetic Li (Zn,Mn) As (TC ~ 50 K)
and semiconducting LiZnAs have a crystal structure similar
to those of antiferromagnetic LiMnAs (T N ~ 450 K) andsuperconducting LiFeAs (Tc ~ 25 K), having common squarelattice As layers with 10% lattice constants matching. Thisfeature may enable fabrication of junction devices of various
combinations of these systems for spin-sensitive electronics.

Fig. 1 Magnetization M (H) of Li1.1 (Zn1-xMnx) As. The graysymbol shows in a very small coercive field of 30100 Oe. The inset table shows the values of T c andthe average ferromagnetic ordered moment size M(T=2K;H=2kOe) per Mn derived from magnetization
measurements for nominally Li excess systems. (citedfrom [5])Fig. 2 Crystal structures of Li(Zn,Mn)As, LiMnAs and LiFeAs.
References[1] H. Ohno, Science 281 ,951-956 (1998).
[2] T. Dietl, Nature Materials 9, 965-974 (2010).
[3] S.J. Potashnik et al., Appl. Phys. Lett. 79, 1495 (2001).
[4] J. Masek et al., Phys. Rev. Lett. 98, 067202 (2007).
[5] Z. Deng et al., Nature Communications, 2, 422 (2011) andin preparation.
[6] S.R. Dunsiger et al., Nature Materials 9, 299-303 (2010).

ASRC 8

Research Group for Condensed Matter Theory
Group Leader : Michiyasu Mori
Members : Hiroaki Onishi, Katsunori Kubo, Jun'ichi Ieda, Hiroto Adachi, Bo Gu, Mari Matsuo,
Mamoru Matsuo, Yuta Yamane, Yuichi Ohnuma
Group Activities

We study new functional materials emerging from theelectrons internal degrees of freedom (spin, charge and orbital)
and the electrons correlation. New principle and new function ofdevices are also our important targets. So far, we have found (1)a new method of spin injection into all types of materials and (2)a spin current generation by a mechanical vibration (phonon).
Details of these two results are summarized in ResearchHighlights. Studies on spin Seebeck effect, spin current
generation by mechanical rotation, ferromagnetic Josephson
junction with magnetic domain wall, and enhanced spin Hall
effect are also progressing soundly.
Theory of spinmotive force and its continuous generation byhighly asymmetric geometry
A spin-originated motive force, i.e., “spinmotive force”, isthe conversion of the magnetic energy in a ferromagnet into
the electrical energy of conduction electrons via the magnetic
exchange interaction. The spinmotive force is given by the spinelectric ﬁeld,,
where m is the local magnetization, P is the spin polarization of
conduction electrons. The Planck constant and the elementarycharge are denoted by ħ and e, respectively. Note that both thetime and the spatial variations of m are necessary to obtainthe spinmotive force. So far, a motion of magnetization or
ferromagnetic nano-particles has been used to generate thespinmotive force. Hence, the obtained results are limited to apulse or ac-type generations.
We proposed a new method to generate a dc spinmotive force[1]. By exciting a ferromagnetic resonance in a comb-shaped
ferromagnetic thin ﬁlm as shown in Fig. 1, it is found that thecontinuous spinmotive force can be obtained. The spin electricﬁeld in the comb-shaped ferromagnet is calculated by supposingthat the local magnetization dynamics is determined by theLandau-Lifshitz-Gilbert equation. Experimental results arequantitatively well reproduced by our theoretical calculations.
Our theory can provide a microscopic understanding of thespinmotive force.

Non-monotonic temperature dependence of thermopower incorrelated electron systems
Since the discovery of unusually large thermopowerin Na xCoO 2, transition-metal oxides with strong electron
correlation have attracted much attention as promising
candidates for high-performance thermoelectric materials.
Thermopower is none other than the amount of entropy flow
along with the electric current. The consideration on the entropy
in thermodynamics tells us the low and high temperature(T) limits of the thermopower: In the metallic systems, thethermopower goes to zero as T goes to 0 K. On the other
hand, the high-temperature limit of thermopower is given by
the entropy consideration in the atomic limit. In the strongly
correlated systems, the spin and orbital degrees of freedom canenhance the high-temperature thermopower in principle.
We studied the role of strong Coulomb interaction on
thermopower, whose temperature dependence is particularly
examined in detail. For this purpose, the single- and multiband Hubbard models are adopted as a minimum model andthe strong Coulomb interaction is treated in the dynamicalmean ﬁeld theory (DMFT), which can capture the coherent-toincoherent crossover due to the strong Coulomb interaction,
U. This method based on the local picture is useful tounderstand the overall behavior of thermopower as a functionof temperature. It is found that the Coulomb interaction gives
rise to a non-monotonic temperature-dependence, which is welldescribed by the entropy consideration at high temperatures. In
the light of our theoretical results, the thermoelectric response in
the transition metal oxides, La1-xSrxVO3 is well explained.

Fig. 2 (a) Thermopower in the high temperature limit, Q 1(T → ∞ with kBT<U) and Q2 (T → ∞ with U<kBT), vs.
electron density, n in the single band Hubbard model. (b)Temperature dependence of the thermopower calculated
by DMFT with the non-crossing approximation as
impurity solver, for various parameter sets of U and n.

Fig. 1 Schematic of the comb-shaped ferromagnetic thin ﬁlm.
The ferromagnetic resonance frequency in the pad region(left) is different from that in the wire region (right).
9 ASRC

References[1] Y. Yamane et al., Phys. Rev. Lett. 107, 236602 (2011).
[2] M. Uchida et al., Phys. Rev. B 83, 165127 (2011).
[3] M. Matsuo et al., Phys. Rev. B 84, 153107 (2011).

Research Group for Molecular Spintronics
Group Leader: Seiji Sakai
Members: Yoshihito Matsumoto, Shiro Entani, Manabu Ohtomo, Pavel V. Avramov

Precise layer number control of graphene in ultra-highvacuum chemical vapour deposition
After the discovery of the convenient fabrication method by the
exfoliation from graphite (A. Geim and K. Novoselov, the 2010Nobel Prize in physics), graphene has been attracting world-wide
attention as an innovative electronic material. In the spintronics,
graphene is expected to be an ideal spin-transport material due tothe extremely long spin diffusion length and high carrier mobility.
However, not only the non-uniformity in the carbon layer
number and in the electronic states but also the polycrystalline
nature of exfoliated graphene are making it impossible to control
the spin transport properties in graphene. It can be said that a
new fabrication method which enables tailoring of graphene isnecessary for the development of spintronic applications.
From the above view point, ultrahigh vacuum chemical
vapor deposition (UHV-CVD) can be an alternative fabrication
method, because single-layer graphene is known to beepitaxially grown on the catalytic metal crystal. In UHV-CVD,
graphene grows through the dissociation and polymerization ofhydrocarbon precursors on the metal surfaces.
In this study [1], we focused on a UHV-CVD growth of
microstructure-controlled graphene by using epitaxial metal thinfilms as a catalytic substrate and with in-situ spectroscopy. It
was successfully demonstrated that single-crystalline graphene(single-layer and bilayer graphene) with the same number ofcarbon layer over the entire area can be obtained by precise
control of the exposure amount of precursors. In addition, it wassuggested that the uniformity of the electronic states in UHVCVD graphene can be remarkably high compared to exfoliatedgraphene (see the Research Highlight for additional details).
Our findings would enable controls of spin transport
properties of graphene and lead to the development of graphenebased spintronics and nano-electronics.

Very high interface spin polarization and its mechanism infullerene-magnetic metal system
Generation of high spin polarization of conduction electrons
at the interface between the magnetic electrode and moleculartransport medium is essential for efficient spin injection. After
1988, magnetic metal crystals have been commonly used fora magnetic electrode in spintronic devices. However, it has
been pointed out that much higher spin polarization than thatin magnetic metal crystals or an appropriate barrier material isnecessary to realize high spin injection efficiency overcoming
the conductivity mismatch problem that can limit spinpolarization of injected electrons into a molecular medium [2].
In this study, it was demonstrated that new compounds offullerene and magnetic metal (e.g., C 60-Co compound, seeFig. 1) can be a promising barrier material which gives rise tonearly-complete spin polarization of conduction electrons at theinterface with magnetic metal crystals. In order to elucidate themagnitude of spin polarization at the interface with the magnetic
metal crystal, the characteristics of tunnelling current andmagnetoresistance were analysed for the C60-Co films consistingof a C60-Co compound and a small amount of Co nanocrystals[3, 4]. It was revealed that spin polarization increases as high as
80% at the C60-Co compound/Co crystal interface in comparison
with that in Co crystal (30%). Our theoretical analysis [5]based on the X-ray absorption and magnetic circular dichroism
spectroscopy indicated that the C60-Co compound can work as aspin filtering barrier due to the exchange splitting in the LUMO
region as represented in Fig. 1.

Group Activities

Spintronics is an emerging technology taking advantage ofthe dual freedom of both charge and spin degrees. Since thediscovery of the giant magnetoresistance of metal multilayers in1988 (A. Fert and P. Grünberg, the 2007 Nobel Prize in Physics),
spintronics has been developed based on inorganic substances
like metals and semiconductors. Recent studies have started
to shed light on spintronic applications of molecular materials
including organic molecules and nanocarbons in which the spinsof conduction electrons can be preserved for a long time anddistance. We call this new field “Molecular spintroncis”.
In molecular spintronics, efficient control of spin transport
processes (spin injection, manipulation and detection) in molecularmaterials are of special importance to realize spintronic applications.
Our group aims at elucidating the advantages of molecular materials
as innovative spintronic materials by exploring novel systems
for efficient spin transport control based on the hybrid systems ofmolecular materials and magnetic metals and also by developing
cutting-edge spectroscopy techniques for the electronic and magnetic
states of the molecular material-based structures and interfaces therein.
Typical progresses in FY2011 are summarized in the following.

Fig. 1 Atomic structure of the C60-Co compound (left) and aschematic view of the spin filtering effect of the C60-Co
compound as a tunnelling barrier for spin injection into a
molecular medium (right) [5, 6]. LUMO/HOMO and up/downarrows in the right figure represent the lowest unoccupied/highest occupied molecular orbital and up/down spin,
respectively. The HOMO-LUMO (band) gaps in the C60-Co
compound are smaller for the spin-down electrons (0.8 eV)than that for the spin-up electrons (1.9 eV), which causes spin
filtering.
References[1] S. Entani et al., J. Appl. Phys. 111, 064324 (2012).
[2] G. Schmidt et al., Phys Rev. B 62, R4790 (2000).
[3] S. Sakai et al., Phys. Rev. B 83, 174422 (2011).
[4] S. Sakai et al., J. Magn. Magn. Mater. 324, 1970 (2012).
[5] I. Hojo et al., J. Electro. Spec. Relat. Phenom. 185, 32 (2012).
[6] A. Nakajima et al., J. Phys. Chem. A 104, 176 (2000).

ASRC 10

Research Group for Mechanical Control of Materials and Spin Systems
Group Leader : Eiji Saitoh
Members : Satoru Okayasu, Masao Ono, Rie Haruki, Hiroyuki Chudo, Hiroshi Yasuoka

Group Activities

The research objective of our group is to develop new
methods for controlling spin currents by combining electron
spins and mechanical rotation, and/or by coupling spins and
NMR techniques. That is to expand spintronics frontier using
mechanical motion and NMR method. Our goals are :1) Magnetization manipulation in terms of mechanical rotation.
2) Detection of a spin current generated from rotating objects
using the spin Hall and spin torque effect.
3) Detection of spin transfer between nonmagnetic andferromagnetic layers by NMR.
Ferrromagentic enhancement in Barnett effects measured
with a highly stabilized rotator at high temperatures
To overcome the difficulty of detecting the tiny effective
magnetic fields induced by rotations, improvements of thehigh-speed rotation system are needed for the reduction of
the magnitude of environmental fields. The residual magnetic
field less than 10 mOe has been achieved by improving theelectromagnetic shielding of the system. Figure 1 is a plot ofmagnetizations of a ferrite sample after a series of experimentsfor observing the Barnett effect. The sample is cooled after
heating to 500 ℃ (above the Curie temperature 480 ℃) withor without the rotations. Squares are the magnetization of thesample without the rotations, and circules are those with therotations where the rotational speed is 0.5 kHz. We observed thesystematic shifts of the magnetization by rotation (Fig. 1). Thisimplies that the effective magnetic ﬁeld induced by the rotations
modulates the net magnetization, consistent with the Barnett
effect affected by the magnetic transition instability

underlying physics of the interface spin exchanges. In orderto take further steps to understand the phenomena, we havebeen trying to generate a spin current using the spin pumping
from resonating nuclear spins. An experimental strategy in thiscategory is rather simple; we have tried to detect a current in thenonmagnetic metallic layer attached to a ferromagnetic layer
via the inverse spin Hall Effect (ISHE) which converts a spincurrent into an electric current. Here the spin pumping is driven
by ferromagnetic nuclear resonance (FNR) which coupledstrongly to the magnetic moment of electrons via the hyperﬁne
coupling in the order of 10-100 T/μB. The ferromagnetic layer
used in the present study was Heusler compounds Co2MnSi,
because it contains 59 Co and 55 Mn nuclei whose naturalabundances are 100%, being appropriate for FNR. A spin current
generated by the spin pumping that is driven either by the 59Co
and 55Mn FNR is detected by the ISHE in the Pt layer.
Figure 2(a) shows the schematic illustration of the setup forthe measurement of spin pumping using 59Co and 55Mn FNR.
The sample is an array of Pt(7 nm)/Co 2MnSi(20 nm) thinrectangular ﬁlms with width of 0.8×9 mm2 in size. These ﬁlms
were wired in series fashion in order to obtain the amplified
voltage arising from the ISHE. The sample assembly wasinserted into an RF-coil, where the RF ﬁeld for FNR was applied
parallel to the electrodes on the Pt layer. In order to align the
ferromagnetic domains, 270 Oe ﬁelds were applied within theﬁlm plane and were rotated with respect to the direction of the
RF field. The FNR spectra associated with the 59Co and 55Mn
nuclei in Pt(7 nm)/Co2MnSi(20 nm) are shown in Fig. 2(b). The
fractional change in the voltage across the FNR frequencies isshown in Fig. 2(c). The electromotive force spectrum exhibits
two broad peaks around the frequency 200 and 350 MHz,corresponding to the 59Co and 55Mn FNR spectra. Althoughthese peaks are broaden compared with the FNR spectrum
especially in 59Co FNR, which is attributed to the surface effect,
this voltage signal implies that the FNR generates a spin current
into the Pt layers.

Fig. 1 Magnetization of a sample by rotations with the angularspeed of Ω.The dotted line represents M=χ(Ω/γ+Henv.).
Sample: anisotropic ferrite magnet with the dimension of
5 mm long and φ1 mm in diameter, Henv. = −0.01 Oe.
Spin pumping induced by the FNR in a Pt/Co2MnSi hetero
junctionTransfer of spin angular momentum from a precessing
localized spin to the conduction electron is called the spin
pumping. The spin pumping from ferromagnetic magnetization
has already been established, and it has been used as a basic
technique for the spin current generation. However, themicroscopic mechanism has not been elucidated yet, particularly

11 ASRC

Fig. 2 (a) A schematic diagram of the sample set-up. (b) FNR
spectra of 59Co and 55Mn. (c) The electromotive force
between electrodes on the Pt layer arising from 59Co and55
Mn FNR.

Research Group for Reactions Involving Heavy Nuclei
Group Leader : Satoshi Chiba
Members : Katsuhisa Nishio, Shinichi Mitsuoka, Hroyuki Koura, Ichiro Nishinaka, Yutaka Utsuno, Hiroyuki Makii,
Yasuo Wakabayashi, Yoshihiro Aritomo, Shuya Ota, Tatsuro Nagayama

Neutron-induced fission cross section of short-lived nucleus
239
U determined by surrogate reaction method
Neutron-induced ﬁssion cross sections for 239U (half-life 23.5min) were determined using the surrogate reaction technique.
The compound nucleus 240U* was populated by the transferreaction 238U(18O,16O)240U*, and the fission probability of 240U*
was determined experimentally. The ﬁssion cross sections wereobtained by refering the know ﬁssion cross sections of 235U(n,f)
and measuring the ﬁssion probability of 236U* populated by thereaction 235U(18O,17O)236U*. The experiment was carried out at
the JAEA tandem accelerator facility. A thin uranium target layer
was bombarded by oxygen beams with 162 MeV. The transfer
channel was identiﬁed by detecting the projectile-like nucleus
using silicon ΔE-E detectors. Fission events were identifeid
by detecting fission fragments with multi-wire proportionalcounters. The results are shown in Fig. 1.

Fig. 1 Neutron-induced fission cross sections (in barn)for 239U(n,f) plotted as a function of neutron energy(preliminary). The step structure associated with the ﬁrst
chance ﬁssion is seen at En = 7 MeV.
Reaction dynamics in collisions between heavy nuclei in theframework of fluctuation-dissipation model
Exotic nuclei far from stable isotopes are produced bycollisions between heavy nuclei. An example is super-heavy
nuclei (SHN), which can be produced by fusion-evaporation
reactions. Understanding the fusion process is essential topredict the cross section for SHN and to make an experimental
strategy. We have developed a model to calculate the evolutionof nuclear shape from the initial impact between a projectile
nucleus and an actinide target nucleus in the framework offluctuation-dissipation model [1]. The actinide nucleus isprolately deformed, so that we have effectively taken into
account the orientation effects on the reaction. Figure 1 shows
the time evolutions of nuclear shape for systems produced by
the 30Si + 238U and 36S + 238U reactions. Fusion is deﬁned as thecase that the nuclear shape attains the one of ground state ofSHN (compound nucleus). The calculation shows the difference
between fusion-ﬁssion and quasiﬁssion in the mass asymmetryof ﬁssion fragments and in the time scale for ﬁssion. The fusion
probability is obtained from the fusion-fission yield relative
to the total fission yield. The probability agreed with thosedetermined by the evaporation residue cross sections [2,3]. The
same model successfully described the nucleon-transfer induced
ﬁssion [4].

Group Activities

The research objective of our group is to investigate heavyion induced reactions such as nucleon-transfer and fusion
reactions. One subject is to develop experimental and theoreticalmethods to determine neutron-induced reaction cross sections
with heavy-ion reactions. For nuclei with short half-lives,
it is practically impossible to measure the cross sections inexperiments using neutron source. The idea of the so-calledsurrogate reaction method is to populate the same compound
nucleus as the neutron-capture reaction by nucleon-transfer
reactions using available target nucleus and to measure thedecay probabilities for ﬁssion and gamma-ray emission to derivefission and capture cross sections. In addition, nuclear fission
and nuclear structure of exotic nuclei and reaction mechanism to
produce exotic nuclei are in our scope.

Fig. 2 Time evolutions of the probability distribution on the
nuclear shape projected on on the mass asymmetry (massunit) and charge-center distance for the systems producedin the reactions of 30Si + 238U (left) and 36S + 238U (right).
Quasifission finishes at the time less than 30×10-21 s,
whereas fusion-ﬁssion appears later than 30×10-21 s.
References[1] Y. Aritomo et al., Phy. Rev. C 85, 044614 (2012).
[2] K. Nishio et al., Phys. Rev. C 82, 024611 (2010).
[3] K. Nishio et al., Phys. Rev. C 82, 044604 (2010).
[4] Y. Aritomo et al., Phys. Rev. C 84, 024602 (2011).

ASRC 12

Research Group for Superheavy Elements
Group Leader : Matthias Schädel
Members : Kazuaki Tsukada, Masato Asai, Tetsuya Sato, Atsushi Toyoshima, Zijie Li, Nozomi Sato,
Kazuhiro Ooe, Yuichiro Nagame
Group Activities

The research objectives of this group are to understandchemical and nuclear properties of superheavy elements (SHEs)
placed at the uppermost end of the Periodic Table and on theheaviest frontier of the nuclear chart. To clarify the chemical
properties of SHEs, we investigate valence electronic structuresof SHEs through experimental determinations of ionization
potentials, redox potentials, and compound formations of SHEs.
To elucidate the limits of stability of the heaviest nuclei, weinvestigate the shell structure of superheavy nuclei throughexperimental assignments of proton and neutron single-particle
orbitals and through the evolution of nuclear deformation at thehighest proton and neutron numbers.
Element 104, rutherfordium (Rf) is the first transactinoid
element. From the simple extension of the Periodic Table of the
Elements, Rf should belong to the group 4 transition metals.
Although chemical properties of Rf are expected to be similar
to those of lighter homologues Zr and Hf, some differences arefound in HCl and HF solutions [1,2], which provides valuable
information on the valence electronic structure of Rf.
Fluorido complex formation of Rf in HF/HNO 3 mixed
solution [3]In the present work, we have investigated the cationexchange behavior of 261 Rf (T 1/2 = 78 s) produced in the248
Cm(18O, 5n) reaction on a “one-atom-at-a-time” scale using
an automated ion-exchange separation apparatus coupled withthe detection system for alpha-spectroscopy (AIDA), together
with its lighter group-4 homologs Zr and Hf, and the tetravalent
pseudo-homolog Th in HF/HNO3 mixed solution. The results
demonstrate that distribution coefﬁcients (Kd) of Rf in HF/0.10 M
HNO3 decrease with increasing concentration of the fluoride
ion [F−] (Fig. 1). This resembles the behavior of the homologs,
indicating the consecutive formation of ﬂuorido complexes of
Rf. We also measured the Kd values of Rf and the homologs as
a function of the hydrogen ion concentration [H+] in the rangeof [F−] = 5.29 × 10−7−3.17 × 10−6 M. The logKd values decreaselinearly with an increase of log[H +] with slopes between−2.1 and −2.5. This indicates that these elements are likely toform the same chemical compounds: mixture of [MF]3+ and[MF2]2+ (M = Rf, Zr, Hf, and Th) in the studied solution. It isalso ascertained that the fluorido complex formation of Rf isFig. 1 Distribution coefficients, K d, of Rf, Zr, Hf, and Th
between a cation-exchange resin CK08Y and 0.10 M
HNO3 plotted as a function of [F−].
13 ASRCsignificantly weaker than that of Zr and Hf, but it is stronger
than that of Th.
Sulfate complex formation of Rf in H 2SO 4/HNO 3 mixed
solution [4]The cation-exchange behavior of Rf was studied in 0.15−0.69
M H2SO4/HNO3 mixed solutions ([H+] = 1.0 M) using AIDA.
It was found that adsorption probabilities (%ads) of 261Rf on
cation-exchange resin decrease with an increase of [HSO4-],
showing a successive formation of Rf sulfate complexes.
Rutherfordium exhibits a weaker complex formation tendency
compared to the lighter homologues Zr and Hf. This is in good
agreement with theoretical predictions including relativistic
effects [5]. It was shown that the lower stability of the Rf
complexes is due to the smaller ionic contribution to thechemical bond, which is caused by the relativistic stabilizationof the 7s orbital, as well as the destabilization and spin-orbit
splitting of the 6d orbitals. It is also in agreement with its larger
ionic radius (76 pm) [6] in comparison with those of Zr (71pm) and Hf (72 pm) [7]. We like to compare this results with
our previous report for the complex formation with fluoride
ions [2,3]. The trend of the ﬂuoride complex formation in thegroup-4 elements is Zr ≈ Hf > Rf > Th, being also in agreementwith theoretical predictions [8]. The smaller ionic contribution
to the metal–fluorine bonding was also responsible for the
weaker ﬂuoride complexation of Rf in comparison with that ofZr and Hf [8].

Fig. 2 Variations of adsorption probabilities, %ads, of Rf, Zr,
and Hf on a cation-exchange resin CA08Y as a functionof [HSO4-] in the H2SO4/HNO3 mixed solutions ([H+] =1.0 M).
References[1] H. Haba et al., J. Nucl. Radiochem. Sci. 3, 143 (2002).
[2] A. Toyoshima et al., Radiochim. Acta 96, 125 (2008).
[3] Y. Ishii et al., Bull. Chem. Soc. Jpn. 84, 903 (2011).
[4] Z. J. Li et al., Radiochim. Acta 100, 157 (2012).
[5] V. Pershina et al., Radiochim. Acta 94, 407 (2006).
[6] V. Pershina, “Theoretical chemistry of the heaviest elements”,
in The Chemistry of Superheavy Elements (M. Schädel, ed.),Kluwer Academic Publisher, Dordrecht (2003).
[7] R. Shannon, Acta Cryst. A 32, 751 (1976).
[8] V. Pershina et al., Radiochim. Acta 90, 869 (2002).

Research Group for Actinide Materials Science
Group Leader : Zachary Fisk
Members : Yoshinori Haga, Etsuji Yamamoto, Naoyuki Tateiwa, Tatsuma D. Matsuda, Yuji Matsumoto,
Akio Nakamura

Superconductivity and hidden-order in URu2Si2 investigatedwith high-quality sample and high-pressure technique
One of the problems in condensed-matter physics is thesuperconductivity occurring in strongly correlated electron
systems where an unconventional type of pairing interaction
is required. A uranium intermetallic compound URu2Si2 shows‘heavy fermion’ superconductivity where the effective mass ofconduction electrons is much larger than that of conventional
metals. It is known that this superconductivity coexists witha so-called ‘hidden-order’ state where some of the electronic
degrees of freedom order. Although extensive studies havebeen carried out for more than 25 years, the order parametercharacterizing the ‘hidden-order’ is not established. We
investigated the peculiar properties of the superconductivity
and hidden-order phase by analyzing the impurity effects andextracted intrinsic behavior which is only seen in high-quality
single crystals, as shown in Fig. 1 [1]. The study is further
extended to high-pressure phase where both the ‘hidden-order’and superconducting transition temperature vary and are finallyreplaced by an antiferromagnetic order. From this study, an
unusual electron scattering in the ‘hidden-order’ state relevant tosuperconductivity was found [2]. See ‘Research Highlights’ fordetails.

Group Activities

5f electrons in actinide compounds play essential roles invarious phase transitions in actinide compounds. The electronic
states can be modified by the chemical or physical environment
around these electrons. It is therefore interesting to investigate
new materials under various conditions such as pressure,magnetic field or low temperature to find new phenomena. The
purification of a known compound also provides new insightparticularly for phenomena occurring at low temperatures,
where impurity disorder can deeply disturb and hence hide theintrinsic behavior.

New neptunium-gallium intermetallic phases
Successive crystal transformations as a function oftemperature or pressure are one of the prominent properties
observed in actinide elemental metals. In contrast to elemental
metals, however, such structural transitions are not likely tooccur in compounds because they are composed of more than
two kinds of atoms and such structural transitions usuallyaccompany changes in the arrangement of the different atomic
species. It is therefore worth investigating the metallic phase
diagram at lower temperatures to look for possible occurrencesof low-temperature phases. Most previous studies on actinide
binary phases have been performed using arc-melted samples
where the high-temperature melt typically around 1,500 ˚C isquenched to low temperature. We investigated Np-Ga phases
using Gallium flux technique where the crystal growth takes
place below 1,000 ˚C. The previous study reports NpGa3 withcubic AuCu3-type structure. We found trigonal phase of NpGa3
instead of cubic phase and a new compound Np3Ga11 [3]. As
shown in Fig. 2, the structure of both compounds conserves a
local atomic arrangement similar to that in the cubic AuCu3-type
structure.

Fig. 2 Crystal structure of trigonal NpGa3 and Np3Ga11.

Fig. 1 Temperature dependence of electrical resistivity
measured of URu 2Si 2 single crystals with different
residual resistivities. The low temperature behavior
as well as the superconducting transition temperaturestrongly depend on the crystal quality.

References[1] T. D. Matsuda et al., J. Phys. Soc. Jpn. 80, 114710 (2011).
[2] N. Tateiwa et al., Phys. Rev. B 85, 054516 (2012).
[3] Y. Haga et al., J. Phys. Soc. Jpn. 80, SA109 (2011).

ASRC 14

Research Group for Condensed Matter Physics of Heavy Element Systems
Group Leader : Shinsaku Kambe
Members : Wataru Higemoto, Yo Tokunaga, Hironori Sakai, Takashi U Ito, Kazuhiko Ninomiya

Group Activities

In heavy element (f-electron) systems, valence fluctuations,
the Kondo effect, and the RKKY interaction compete with one
another. Because of this, exotic behaviors such as quantum
critical points, heavy fermions, non-Fermi liquids, anisotropic
superconductivity and multipolar ordering appear when suchcompetition is strong. Recently, it has become clear that these
exotic behaviors for 5f-electron systems are different from thosefor 4f-electrons. This is because electrons with different spin andorbital character can coexist in 5f actinide systems, in contrast to
the case of 4f electrons. By means of microscopic spectroscopy:
NMR and μSR, our research group tries to clarify these exotic
behaviors due to the “many-fold” character of both 4f and 5f
compounds, including transuranium.
Non-collinear antiferromagnetic ordering and new type ofmultipolar frustration in TbCoGa5
HoCoGa5 type structure (115) compounds are particularlyinteresting since many fascinating phenomena are observed i.e.
unconventional superconductivity near a magnetic quantum
critical point (as shown in research highlight for CeCoIn 5),
and phase transition related with multipolar ordering. In thiscontext, it is quite important to understand magnetic interactions
between f-electrons in the 115 systems. A 115 type compound
TbCoGa5 shows successive two antiferromagnetic transitions.
From neutron diffraction measurements, there are two orderedstates AF-I (high T phase below TN1=36 K) and AF-II (low T
phase below TN2=5.4 K). Tb moments order in a stripe fashion
along the c-axis in the AF-I phase, and an ordering in the abplane is ﬁnally established in the AF-II phase. Unfortunately, theneutron measurements could not distinguish collinear from noncollinear structure of the AF-II phase. If non-collinear structureis the case, it is particularly interesting since such behaviour
suggests a magnetic frustration in the ab-plane.

Based on the Ga-NMR in TbCoGa 5, the AF-II has been
actually identified as non-collinear phase for the first time
(Fig. 1) [1]. Generally, non-collinear structure can appear to
reduce frustration, whereas there is no geometrical frustrationin TbCoGa5, indicating that there may be a new mechanism offrustration. Now a possible mechanism i.e. frustration between
dipolar and quadrupolar interactions is investigated.
Coexistence of superconductivity and multipolar ordering in
PrIr2Zn20
PrIr2Zn20 belongs to caged compounds RT2X20 having the
cubic CeCr2Al20-type structure where R atoms are encapsulated
in cages formed by 16 zinc atoms. In a RT 2X 20 system, amultipole phase transition is expected to occur owing to thehighly degenerate ground state. Among these systems, PrIr2Zn20
is particularly interesting since ac-magnetic susceptibility
measurements revealed superconductivity below 0.05 K.
Furthermore, recent low-temperature speciﬁc heat measurements
reveal another phase transition below 0.11 K, although theorigin of transition has not been identiﬁed.
To elucidate magnetic and superconducting properties, we
performed muon spin rotation and relaxation measurements(μSR) in PrIr2Zn20 at very low temperatures [2]. As shown in
Fig. 2, temperature independent μSR spectra were observed
below 1 K, indicating that a phase transition at 0.11 K is of a
non-magnetic origin, most probably pure quadrupole ordering.
In the superconducting phase, no sign of unconventional
superconductivity, such as superconductivity with broken timereversal symmetry, was seen below Tc=0.05 K. The present
measurement indicates that a coexistence of superconductivity
and quadrupolar ordering may be realized in PrIr2Zn20. Now
relation between the superconductivity and quadrupolar
ﬂuctuations is investigated.

Fig. 2 Zero field (ZF) μSR spectra in PrIr2Zn20 at 1.0 K and
0.02 K.
Fig. 1 Antiferromagneically ordered structures in TbCoGa5.
Collinear AF I at high temperatures TN2<T<TN1 (left) andnon-Collinear AF II at low temperatures T<TN2 (right). q
is ordering wave vector.
15 ASRC

References[1] Y. Tokunaga et al., Phys. Rev. B 84, 214403 (2011).
[2] W. Higemoto et al., to appear in Phys. Rev. B.

Research Group for Hadron Physics
Group Leader : Ken-ichi Imai
Members : Toshiki Maruyama, Hiroyuki Sako, Susumu Sato, Shoichi Hasegawa, Kotaro Shirotori, Ryuta Kiuchi,
Kiyoshi Tanida, Hitoshi Sugimura, Yudai Ichikawa, Minoru Okamoto

Experimental search for pentaquarks Θ+
The Θ+ baryon has been searched for via the π−p → K−X
reaction using a 1.92 GeV/c π− beam at the J-PARC−K1.8 beamline. The K1.8 beam line spectrometer and the SKS spectrometershown in Fig. 1, both of which have an excellent momentum
resolution, were used. In the missing mass spectrum, no
prominent peak has been observed (Fig. 2) in the Θ+ mass region[1]. The preliminary upper limit of the differential cross section
averaged over the scattering angle from 2 to 15 degrees at thelaboratory frame was less than 0.3 μb/sr at the 90% conﬁdence
level in the missing mass region of 1.51–1.55 GeV/c2.
Study of the exotic state with strangeness; H-dibaryon
One of the exotic hadronic states, composed of 6 quarks, isH-dibaryon (“uuddss” quark state). In order to observe such astate, a large acceptance tracking spectrometer is indispensable.
We have been doing R&D for a Time Projection Chamber(TPC), and Silicon Strip Detectors (SSDs) with Seoul National
University and Scintillating Fiber trackers (SciFi) with Tohoku
University as high-rate pion and kaon beam line trackers. A
beam test has been performed at RCNP in Nov. 2011, and good
performance (at 106 of incident beam rate) of these detectors
was obtained (e.g., in TPC, a few 100s micrometer resolution
was achieved). Design of the spectrometer is progressing incollaborating with Pusan National University.
Study of heavier flavour (charm/bottom) in heavy ion
collision
We have developed and installed a vertex pixel detector incollaboration at BNL-RHIC PHENIX experiment, to extrapolate
the signal from particle with charmed and/or bottom ﬂavours. In
2011 and 2012, we have accumulated collision data of Au + Au
and Cu + Au.
Numerical study of inhomogeneous structures in nuclear
matterWe have numerically explored the pasta structures [3] andproperties of low-density nuclear matter without any assumption
on the geometry. We observed conventional pasta structures,
while a mixture of the pasta structures appeared as a metastablestate at some transient densities. Proton density distributionsof the ground states of symmetric matter are shown in Fig. 3.

Typical pasta structures were observed: (a) Spherical dropletsat baryon density of 0.01 fm −3. (b) Cylindrical rods with ahoneycomb crystalline structure at 0.024 fm −3. (c) Slabs at
0.05 fm−3. (d) Cylindrical tubes with a honeycomb crystalline
structure at 0.08 fm−3. (e) Spherical bubbles at 0.09 fm−3.

Group Activities

The research objectives of Hadron Physics Research Group
are: (i) empirical study of structure of nuclei and hadrons withstrangeness, with use of high intensity K(π)-beams at J-PARC,
and (ii) theoretical study of nuclear matter, hadrons withstrangeness, and high density matter realized in neutron stars.
In JFY 2011, we have (1) searched for pentaquarks Θ+ at
J-PARC (E19) and established new upper limits, (2) proposed anexperiment for H-dibaryon at J-PARC (P42), and (3) developedand installed vertex pixel detector for charm/bottom tagging at
BNL−RHIC PHENIX experiment to study high energy heavy
ion collisions. Also we have studied (4) high density matters intheoretical simulations, in which phase transitions of baryon density
distribution has been found at the surface of the neutron star.

Fig. 1 K1.8 beam line spectrometer and the SKS spectrometer
at J-PARC.

Fig. 2 Missing mass spectrum distribution via π− p → K−X
reaction using a 1.92 GeV/c π− beam. The red histogramshows corresponding background.

Fig. 3 Proton density distributions of the ground states ofsymmetric nuclear matter. For details, see the text.
References[1] K. Shirotori et al., The Fifth Asia-Pacific Conference on
Few-Body Problems in Physics, APBF2011 (2011).
[2] Program Advisory Committee (PAC) for Nuclear andParticle Physics Experiments at the J-PARC 50 GeV Proton
Synchrotron: http://j-parc.jp/researcher/Hadron/en/PAC_for_
NuclPart_e.html, J-PARC PAC (2011).
[3] T. Maruyama and T. Tatsumi, J. Phys. Conf. Ser. 312,
042015 (2011).

ASRC 16

Research Group for Bioactinide
Group Leader : Toshihiko Ohnuki
Members : Naofumi Kozai, Fuminori Sakamoto, Shinya Yamasaki, Mingyu Jiang, Shousuke Igarashi

Group Activities

The research objectives of Bioactinides Chemistry Researchgroup are elucidate chemical states change of actinides andlanthanides including nano-particles formation in the biologicalreaction environments. In the year of 2011, chemical stateschange of lanthanides by the transfer of phosphorous ions andelectron from the cells to lanthanides has been studied.

Formation of phosphate nano-particles in the biologicalreaction environments
Phosphate minerals containing heavy elements of lanthanides
and U are known to be hardly soluble in the aqueous solution
in the environments. Phosphorous is an essential element of
microorganisms. The microorganisms store P in their cells.
We have found that yeast, Saccharomyces cerevisiae releases
P in solution containing Ce(III), followed by the formation of
cerium phosphate mineral of monazite [1]. However, not only
mechanism of the formation of REE phosphate mineral, but roleof microorganisms for the formation have not been elucidated.
When the yeast cells are exposed to the solution containing
1.44 × 10 -4 mol/L Yb(III) (heavy REE) for 2-120 h, andtwo months at 25 ± 1 °C at an initial pH of 3, 4, or 5, Yb
concentrations in solutions decreased as a function of exposure
time [2]. Field-emission scanning electron microscopy equippedwith energy-dispersive X-ray spectroscopy (FESEM), andtransmission electron microscopy (TEM) analyses revealed
that nano-sized blocky Yb phosphate with an amorphous phaseformed on the yeast cells surfaces in the solutions with Yb.
These nano-sized precipitates that formed on the cell surfaces
remained stable without changing their size even after twomonths of exposure at 25 ± 1 °C around neutral pHs.
The synchrotron-based extended X-ray absorption finestructure (EXAFS) analysis revealed that the chemical stateof the accumulated Yb on the cell surfaces changed from theadsorption on both phosphate and carboxyl sites at 30 min
to Yb phosphate precipitates at 5 days, indicating the Ybphosphate precipitation as a major post-adsorption process. In
addition, the precipitation of Yb phosphate occurred on cellsurfaces during 7 days of exposure in Yb-free solution after 2 hof exposure (short-term Yb adsorption) in Yb solution. These
results suggest the transformation of the adsorbed Yb to Yb
phosphate precipitates on cell surfaces, even though no P wasadded to the exposure solution. In an abiotic system, the EXAFS
data showed that the speciation of sorbed Yb on the referencematerials, carboxymethyl cellulose and Ln resin, did not changeeven when the Yb was exposed to P solution, without forming
Yb phosphate species. This result strongly suggests that thecell surface of the yeast plays an important role in the Ybphosphate precipitation process, not only as a carrier of thefunctional groups but also as a substrate inducing the nucleationof phosphate nanoparticles.
These results indicate that light and heavy REEs behave
different manner at the biological reaction environments. This
fact stimulates us to investigate the behaviour of series of REEs
at the biological reaction environment. We have a plan to study
on the behavior of series of REEs by yeast.

17 ASRC

Chemical states change of REEs - desferrioxamine B
complexes by Pseudomonas fluorescens and γ-Al2O3
Biological materials possess functional groups able tocomplex with metal cations. Siderophores are microbial
chelating agents produced to solubilize Fe(III). Desferrioxamine(DFO) B is a trihydroxamate siderophore ubiquitously found in
the environment and its interaction with various metal cations
has been studied. We found that at pH 7 negative adsorption
anomaly of Ce on P. fluorescens cells and γ-Al2O3 compared to
the neighbouring REEs(III), La(III) and Pr(III); this was because
the oxidization of Ce(III) to Ce(IV) during complexiation with
DFO and the higher stability of the Ce(IV)-DFO complex thanthat of the Ce(III)-DFO complex and the La(III)- and Pr(III)DFO complexes [3].
In this study, we have studied the interactions of REEs (La,Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er) - DFO complexes
with P. fluorescens cells and with γ-Al2O3, at pH 4 – 9. The
higher percent adsorption of REEs was obtained at lower pHs
on P. fluorescens cells and at higher pHs on γ-Al2O3. Degreeof negative anomaly of Ce compared to its neighbouring
REEs, La(III) and Pr(III) decreased with increasing pH. XAFS
analysis showed that Ce exists as the Ce(IV)-DFO complex
in higher pH than 6. Thus, the pH dependence of Ce anomaly
is predominantly dependent on the stability of Ce(IV)-DFO
complex.

Fig. 1 Degrees of Ce anomaly and Kd(Sm) on P. fluorescens
cells and γ-Al2O3 as a function of pH.The degree of Ce
anomaly for the Kd(REE) patterns was expressed by:
DA = logKd(Ce)-[logKd(La) + logKd(Pr)]/2.
References[1] M. Jiang et al., Chemical Geology, 277, 61(2010).
[2] M. Jiang, Thesis Kyushu Univ. (2012).
[3] T. Ohnuki, T. Yoshida, Chemistry Letters, 41, 98(2011) .

Research Group for Radiation and Biomolecular Sciences
Group Leader : Akinari Yokoya
Members : Kentaro Fujii, Miho Noguchi, Ayumi Urushibara, Toshitaka Oka, Yuki Sugaya,
Iyo Shiraishi, Takuya Shiina

In vitro study of repairability of 8-oxoG/single strand breakcontaining clusters depends on their relative positions
The biological consequences of clusters DNA damage site
containing a single strand break (SSB) and nucleobase lesion(s)remain largely unknown. We examined the repairbility of two- andthree-lesion clustered damage sites containing a 1-nucleotide gap(GAP) and 8-oxo-7,8-dihydroguanine(s) (8-oxoG(s)) by a baseexcision repair enzyme, Fpg, in vitro [1]. Fpg speciﬁcally excises
purine base lesions such as 8-oxoG residues from DNA backbone
via its AP lyase activity, and subsequently cleaves the DNA. The
processing of the tandem cluster by Fpg leads to the generation ofan additional band with a slightly larger size (18 mer OH termini)
than that observed after excision of a single 8-oxoG (Fig. 1).

the additional 8-oxoG on the complementary strand does not inhibit
the action of Fpg at the 8-oxoG placed with a GAP in tandem.
LET dependence of the yield of DNA damage induced infully hydrated DNA films by ion particle-irradiation
In order to clarify the characteristics of DNA damage inducedby high LET charged particle-radiation, the yield of DNA damage
induced in closed-circular plasmid DNA (pUC18) were measured
after exposing to various kinds of radiation (He, Ne and C ions;
2 to 900 keV/μm) using the JAEA-TIARA and NIRS-HIMAC
facilities [2]. Hydrated DNA samples were used together withbase excision repair enzymes, Fpg (see above) and EndoIII,
which mainly excises pyrimidine base lesions, to detect thelesions as enzyme sensitive sites (ESSs). The results show that 1)
the yields of ESS decrease drastically with increasing LET andvery few ESSs are induced >100 keV/μm, althoguh the yield of
SSB does not depend signiﬁcantly on LET of the ions (Fig. 2), 2)
the yield of duble strand breaks (DSBs) increases with increasing
LET, however, 3) those of clustered damage sites visualized asadditional DSBs by enzymatic treatment decrease with increasing
LET, and 4) C and Ne ions induce less nucleobase lesions than Heions for comparable LET values. These results indicate that theyields of clusters containing nucleobase lesions, which are lessreadily processed by the base excision repair enzymes, depend
not only on LET but also on the ion particle used.

Group Activities

The research objective of the research group is to fully
characterize molecular processes by which ionizing radiation
alters the chemical structure of DNA in cells. Two approaches
were proposed to address the main objective: 1) Obtain
experimental evidence of repairability of artificial clustered
DNA damage in vitro. 2) Determine the yields of DNA lesions
in a simple model DNA molecule, in terms of LET (Linear
Energy Transfer) as an index of charged particle-radiation.

Fig. 1 Gel image of the excision of an 8-oxoG by Fpg placed intandem with a GAP. (A) The shematic diagram of a Cy5labeled double stranded oligonucleotide containing a GAP and
an 8-oxoG tamdem clsuter. (B) 5’ Cy5-labeled tandem cluster(8G-2, GAP+1) was incubated with increasing amounts(0-10 units) of Fpg. The conﬁguration of the tandem cluster isindicated above the gel. 5’ Cy5-labeled duplex oligonucleotides
containing a single 8-oxoG (8G-2) incubated with Fpg and asingle GAP (GAP+1) are shown for comparison.
The activity of the enzyme causes successive β- andδ-elimination reactions and generates a 1-nt gap. We treated thecluster with 0.1M NaOH, as an alkaline treatment is known toconvert the β-elimination product to δ-elimination product atthe 3’ end. The result that the additional band disappeared after
the alkaline treatment indicates that the band corresponds to a
fragment generated by β-elimination. Further, to look at the effectof an additional 8-oxoG on the opposite strand for the excision of
the 8-oxoG placed with a GAP in tandem, a three-lesion cluster(two 8-oxoGs and one GAP) was treated with Fpg. The 8-oxoG
in tandem with a GAP in the three-lesion cluster is excised in a
fashion similar to the excision of the 8-oxoG with a GAP in thetandem two-lesion cluster, forming two bands. This indicates that

Fig. 2 Dependence of the yield of SSB or n(ESS or SSB) on LET for
fully hydrated DNA irradiated with 4He2+ ions (A), 12C5+,6+ (B)and 20Ne8+,10+ (C) at 5.6 °C ( ○ ), or following post-irradiation
incubation for 30 min at 37 °C in the absence ( ● ) or presenceof either Nth ( △ ), Fpg ( □ ), or both Nth and Fpg ( ◇ ).
The yields of isolated nucleobase lesions visualized by the
enzymatic treatment decrease drastically with increasing LET.
References[1] M. Noguchi et al., Mutat. Res. 732, 34 (2012).
[2] T. Ushigome et al., Radiat. Res. 177, 614 (2012).

ASRC 18

Research Group for Spin-Polarized Positron BeamGroup Leader : Atsuo Kawasuso
Members : Masaki Maekawa, Yuki Fukaya, Izumi Mochizuki, Atsushi Yabuuchi

Group Activities

The research objectives of Spin-Polarized Positron BeamGroup are to promote spintronics material study using a highly
spin-polarized positron beam. Using a positron source (68Ge68
Ga) produced through a nuclear reaction, we develop a spinpolarized positron beam. After establishing the foundation of
spin-polarized positron annihilation spectroscopy (SP-PAS)from both experimental and theoretical viewpoints, using SPPAS method, we study spintronics materials and novel spin
phenomena.
Construction of spin-polarized positron beam line using a68
Ge-68Ga source
To conduct spintronics study extensively, we need to havea spin-polarized positron beam. The performance required forthe spin-polarized positron beam is as follows: (i) Higher spinpolarization, (ii) Energy tunability from several eV to tenthkeV, (iii) Polarization switchability between longitudinal andtransverse directions. To fulfill the above requirements, we
produced a 68Ge-68Ga source which emits highly spin-polarized
positrons as compared to the conventional 22Na source andconstructed an electrostatic beam line as shown in Fig.1 [1]. The
68
Ge-68Ga source was produced through a proton nuclear reaction
69
Ga(p, 2n)68Ge. For an efficient production of 68Ge-68Ga, wefirst used an isotope-separated 69Ga metal as a target material.
However, melted Ga reacted with the capsule materials andeventually destroyed the capsule itself. We therefore replaced the69
Ga metal with a GaN crystal and have been repeating irradiation
experiment more than fifteen times since April/2010. The current
activity of the 68Ge-68Ga source gets to approximately 300 MBq.
Consequently, we succeeded to generate a spin-polarized positron
beam with a flux of 5×103 e+/sec and a polarization of more than
35 %. We also confirm that, by changing the energy selector
between magnetic and electrostatic deflectors, the polarization
direction can be changed between longitudinal and transverse.
Using this spin-polarized positron beam, we could observe themagnetic-field-reversal asymmetry of the Doppler broadening ofannihilation radiation spectra.
Spin Hall effect on a Pt(001) surface observed by spinpolarized positron annihilation
The spin Hall effect (SHE) is a phenomenon of electron spin
flow, which occurs near non-magnetic conducting material
surfaces under a direct current. The origin of SHE is thought
to be the spin-orbit interaction between conduction electrons
and nuclei. Conduction electrons with spins perpendicular tothe charge current will be bent to the transverse directions forboth the current and spin directions. Consequently, in-plane
polarized electron spins appear near each surface surrounding
the current axis. Recently, markedly large SHEs were reported
in some metals, such as Pt and Au. Furthermore, direction ofspin polarization is found to be different for different metal
kinds. Experimental detection of metal SHE is normallydone by using magnetotransport or ferromagnetic resonancemeasurements. These methods hardly determine polarizationof electron spins appeared on metal surfaces due to SHE. In
using a spin-polarized positron beam, we attempted to detect

19 ASRC

polarized electrons near the Pt(001) surface [2]. We foundthat the intensity of three-photon annihilation of spin-triplet
positronium changes upon current reversal (Fig. 2) and theasymmetry in the intensity depends on angle between positronpolarization and current directions as anticipated for SHE of
Pt. The spin polarization of surface electrons near the Fermi
level was evaluated to be more than 0.01 which is four orders ofmagnitude greater than that expected from a conventional spin
diffusion theory. To explain the above experimental fact, somespecial surface effects such as the Rashba effect and surface
ferromagnetism should be considered.
G e detector

S amplec hamber

E nergy s elector

B ea m pa s s

P os itron s ource(ins ide the s hields )Fig. 1 Picture of newly developed spin-polarized positron beamline. The source part (surrounded by lead and concrete
blocks) is directly connected to the proton irradiationchamber. The source strength is increased by repeating
irradiation annually. The positron beam is lifted up fromthe positron gun, bent 90° and transported horizontally tothe sample chamber. At the sample chamber, annihilation
gamma rays are measured by a high-purity Ge detector.

Fig. 2 Three-gamma annihilation intensity measured uponsuccessive current reversal observed for the Pt(001) surface.
(+) and (-) denote the direction of current applied for the
sample. Current and positron spin polarization directions
are perpendicular to each other. The oscillating behaviourof the three-gamma annihilation intensity upon current
reversal means that spin-polarization of surface electrons ischanged between parallel and anti-parallel with respect tothe positron spin-polarization upon current reversal.
References[1] M. Maekawa et al., Nucl. Inst. Meth. Phys. Res. B, submitted.
[2] A. Kawasuso et al., Phys. Rev. Lett., to be published.

Publication List
Research Group for Condensed Matter Theory
resonant inelastic x-ray scattering, K. Ishii, K. Tsutsui, K. Ikeuchi, I. Jarrige, J.
Mizuki, H. Hiraka, K. Yamada, S. Maekawa, Y. Endoh, H. Ishii, and Y.Q.Cai,
Phys. Rev. B 85, 104509-1-104509-5 (2012).
22) Acoustic spin pumping: Direct generation of spin currents from sound waves in
Pt/Y3Fe5O12 hybrid structures, K. Uchida, H. Adachi, T. An, H. Nakayama, M.
Toda, B. Hillebrands, S. Maekawa, and E. Saitoh, J. Appl. Phys. 111, 153903-1053903-8 (2012).
Invited Talks
1) Theory on pure spin current, S. Maekawa, Intermag 2011, Taipei, Taiwan(2011).
2) Are only phonons relevant to the long-range nature of the spin Seebeck effect?,
H. Adachi, Spin Caloritronics III, Leiden, Netherlands (2011).
3) Spin current from mechanical motion, J. Ieda, Spin Caloritronics III, Leiden,
Netherlands (2011).
4) Spin-wave, spin current and spin seebeck effect, S. Maekawa, PM'11, Poznan,
Poland (2011).
5) Spin Seebeck effect and thermoelectric power generation by insulator, H.
Adachi, Recent Progress on Thermoelectric Materials and Modules, Tokyo,
Japan, (2011).
6) Conservation laws and spin motive force in magnetic nanostructures, S.
Maekawa, 5th international workshop on Spin Current, Sendai, Japan (2011).
7) Non-equilibrium magnons, spin current and spin Seebeck effect, S. Maekawa,2nd International Workshop on Magnonics: From Fundamentals to
Applications, Recife, Brazil (2011).
8) Dynamics of Josephson-phase coupled with spin waves, M. Mori, The 26th
International Conference on Low Temperature Physics (LT26), Beijing, China(2011).
9) Conservation laws and spin motive force in magnetic nanostructures, S.
Maekawa, Moscow International Symposium on Magnetism, Moscow, Russia(2011).
10) Theory of phonon-drag spin Seebeck effect, H. Adachi, The 4th annual
showcase of materials-allied research at The Ohio State University, Ohio, USA(2011).
11) Influences of magnetic-fluctuation, resonance, and oscillation on Josephsoncurrent in superconductor/ferromagnet/superconductor junction, M. Mori,
Vortex matter in nanostructured superconductors (VORTEX VII), Rhodes,
Greece (2011).
12) Thermopower in correlated electron systems revisited: non-monotonic
temperature dependence, M. Mori, ARW Workshop Hvar 2011, Hvar, Croatia(2011).
13) Seebeck effect, spin Seebeck effect and spin-electronics, S. Maekawa, The 2nd
International Symposium on Hybrid Materials and Processing 2011, Busan,
Korea (2011).
14) Magnons, phonons, and spin Seebeck effect, S. Maekawa, 56th Annual
Conference on Magnetism & Magnetic Materials, Arizona, USA (2011).
15) Magnetic resonance appeared in ferromagnetic Josephson junction, M. Mori,
2011 Gordon Godfrey Workshop on Spins and Strong Correlations, Sydney,
Australia (2011).
16) Spin-motive force in magnetic nanostructures, S. Maekawa, Joint PolishJapanese Workshop on "Spintronics-from new materials to applications",
Warsaw, Poland (2011).
17) Heat and spin, S. Maekawa, FIRST-QS2C Workshop on "Eergent Phoenomenaof Carrelated Materials", Okinawa, Japan (2011).
18) Theory on spin current generation, S. Maekawa, SpinCaT conference, Bonn,
Germany (2012).
19) Phonon-driven spin Seebeck effect, H. Adachi, 2nd ASRC International
Workshop on Magnetic materials and Nanotructures, Tokai, Japan (2012).
20) Spin-Motive Force, S. Maekawa, RIKEN-APW-APCTP Jpint Workshop "Recet
trend in condensed matter physics", Wako, Japan (2012).
21) Heat and spin, S. Maekawa, ILL Colloquium, Grenoble, France (2012)22) Magnons, spin current and spin Seebeck effect, S. Maekawa, APS March
Meeting, Boston, USA (2012).
23) Spin-motive force and electric ﬁeld effects, J. Ieda, Mini workshop on electricfield effect, Sendai, Japan (2011).

Publication List

Papers1) Thermoelectric response in the incoherent transport region near Mott transition:
the case study of La1-xSrxVO3, M. Uchida, K. Oishi, M. Matsuo, W. Koshibae,
Y. Onose, M. Mori, J. Fujioka, S. Miyasaka, S. Maekawa, and Y. Tokura, Phys.
Rev. B 83, 1651271-1-1651271-5 (2011).
2) Equation-of-motion approach of spin-motive force, Y. Yamane, J. Ieda, J. Ohe,S. E. Barnes, and S. Maekawa, J. Appl. Phys. 109, 07C735-1-07C735-3 (2011).
3) Spin current generation due to mechanical rotation in the presence of impurity
scattering, M. Matsuo, J. Ieda, E. Saitoh, and S. Maekawa, Appl. Phys. Lett. 98,
242501-1-242501-3 (2011).
4) Composite excitation of Josephson phase and spin waves in Josephson
junctions with ferromagnetic insulator, S. Hikino, M. Mori, S. Takahashi, and S.
Maekawa, J. Phys. Soc. Jpn. 80, 074707-1-074707-8 (2011).
5) Giant enhancement of spin accumulation and long-distance spin manipulation
in metallic lateral spin valves, Y. Fukuma, L. Wang, H. Idzuchi, S. Takahashi, S.
Maekawa, and Y. Otani, Nature Materials 10, 527-531 (2011).
6) Electrically tunable spin injector free from the impedance mismatch problem,
K. Ando, S. Takahashi, J. Ieda, H. Kurebayashi, T. Trypiniotis, C. Barnes, S.
Maekawa, and E. Saitoh, Nature Materials 10, 655-659 (2011).
7) Long-range spin Seebeck effect and acoustic spin pumping, K. Uchida, H.
Adachi, T. An, T. Ota, M. Toda, B. Hillebrands, S. Maekawa, and E. Saitoh,
Nature Materials 10, 737-741 (2011).
8) Spinmotive force due to intrinsic energy of ferromagnetic nanowires, Y.
Yamane, J. Ieda, J. Ohe, S. E. Barnes, and S. Maekawa, Appl. Phys. Express 4,193003-1-093003-3 (2011).
9) Spin-dependent inertial force and spin current in accelerating systems, M.
Matsuo, J. Ieda, E. Saitoh, and S. Maekawa, Phys. Rev. B 84, 104410-1104410-9 (2011).
10) Li(Zn,Mn)As as a new generation ferromagnet based on a I-II-V semiconductor,
Z. Deng, C.Q. Jin, Q.Q. Liu, X.C. Wang, J.L. Zhu, S.M. Feng, L.C. Chen,
R.C. Yu, C. Arguello, T. Goko, Fanlong Ning, Jinsong Zhang, Yayu Wang,
A.A. Aczel, T. Munsie, T.J. Williams, G.M. Luke, T. Kakeshita, S. Uchida, W.
Higemoto, T.U. Ito, Bo Gu, S. Maekawa, G.D. Morris, and Y.J. Uemura, Nature
Communications 2, 422 (2011).
11) Continuous Generation of Spinmotive Force in a Patterned Ferromagnetic Film,
Y. Yamane, K. Sasage, T. An, K. Harii, J. Ohe, J. Ieda, S. E. Barnes, E. Saitoh,and S. Maekawa, Phys. Rev. Lett. 107, 236602-1-236602-4 (2011).
12) Nonmonotonic temperature dependence of thermopower in strongly correlated
electron systems, M. Matsuo, S. Okamoto, W. Koshibae, M. Mori, and S.
Maekawa, Phys. Rev. B 84, 153107-1-153107-4 (2011).
13) Inverse spin-Hall effect induced by spin pumping in metallic system, K. Ando,
S. Takahashi, J. Ieda, Y. Kajiwara, H. Nakayama, T. Yoshino, K. Harii, Y.
Fujikawa, M. Matsuo, S. Maekawa, and E. Saitoh, J. Appl. Phys. 109, 1039131-103913-11 (2011).
14) Gutzwiller method for an extended periodic Anderson model with the c–f
Coulomb interaction, K. Kubo, J. Phys. Soc. Jpn. 80, 114711-1-114711-8(2011).
15) Mass enhancement in an intermediate-valent regime of heavy-Fermion systems,
K. Kubo, J. Phys. Soc. Jpn. 80, 063706-1-063706-4 (2011).
16) Multipole correlations of t2g-orbital Hubbard model with spin-orbit coupling,
H. Onishi, J. Phys. Soc. Jpn. 80 Suppl. A, SA141-1-SA141-3 (2011).
17) Correlation effects on antiferromagnetism in Fe pnictides, K. Kubo and P.
Thalmeier, J. Phys. Soc. Jpn. 80, Suppl. A, SA121-1-SA121-3 (2011).
18) Quantum dynamics of a driven correlated system coupled to phonons, L.
Vidmar, J. Bonča, T. Tohyama, and S. Maekawa, Phys. Rev. Lett. 107, 2464041-246404-5 (2011).
19) Polarization-analyzed resonant inelastic x-ray scattering of the orbital
excitations in KCuF 3, K. Ishii, S. Ishihara, Y. Murakami, K. Ikeuchi, K.
Kuzushita, T. Inami, K. Ohwada, M. Yoshida, I. Jarrige, N. Tatami, S. Niioka,
D. Bizen, Y. Ando, J. Mizuki, S. Maekawa, and Y. Endoh, Phys. Rev. B 83,
241101-1-241101-4 (2011).
20) Detection of spin-wave spin current in a magnetic insulator, Y. Kajiwara, S.
Takahashi, S. Maekawa, and E. Saitoh, IEEE Transaction on Magnetics 47,
1591-1594 (2011).
21) Electronic excitations around the substituted atom in La2Cu1−yNiyO4 as seen via

Research Group for Molecular Spintronics
Papers1) Interface properties of Ag and Au / graphene heterostructures studied by microraman spectroscopy, S. Entani, S. Sakai, Y. Matsumoto, H. Naramoto, T. Hao,and Y. Maeda, Jpn. J. Appl. Phys. 50, 04DN03-1-04DN03-5 (2011).
2) Ab initio LC-DFT study of graphene, multilayer graphenes and graphite, P. V.
Avramov, S. Sakai, S. Entani, Y. Matsumoto, and H. Naramoto, Chem. Phys.
Lett. 508, 86-89 (2011).
3) Effect of cotunneling and spin polarization on the large tunnelingmagnetoresistance effect in granular C60-Co ﬁlms, S. Sakai, S. Mitani, I. Sugai,
K. Takanashi, Y. Matsumoto, S. Entani, H. Naramoto, P. Avramov, and Y.
Maeda, Phys. Rev. B 83, 174422-1-174422-6 (2011).
4) Multiplet scattering approach to XAS for Co-C60 Films, I. Hojo, Y. Matsumoto,
T. Maruyama, S. Nagamatsu, S. Entani, S. Sakai, T. Konishi, and T. Fujikawa,
Photon Factory News 29, 20-25 (2011) (in Japanese).
5) Thermo-dynamical contours of electronic-vibrational spectra simulated using
the statistical quantum–mechanical methods, V. Pomogaev, A. Pomogaeva,

ASRC 20

P. Avramov, K. J. Jalkanen, and S. Kachin, Theor. Chem. Acc. 130, 609-632(2011).
6) Ferromagnetic interlayer coupling in C60-Co compound / Ni bilayer structure,
Y. Matsumoto, S. Sakai, S. Entani, Y. Takagi, T. Nakagawa, H. Naramoro, P.
Avramov, and T. Yakoyama, Chem. Phys. Lett. 511, 68-72 (2011).
7) Ion channeling study of epitaxy of iron based Heusler alloy films on Ge(111),
Y. Maeda, K. Narumi, S. Sakai, Y. Terai, K. Hamaya, T. Sadoh, and M. Miyao,
Thin Solid Films 519, 8461-8467 (2011).
8) Determination of silicon vacancy in ion-beam synthesized β-FeSi2, Y. Maeda,
T. Ichikawa, T. Jonishi, and K. Narumi, Physics Procedia 11, 83-86 (2011).
9) Relative isomer abundance of fullerenes and carbon nanotubes correlates withkinetic stability, A. S. Fedorov, D. A. Fedorov, A. A. Kuzukov, P. V. Avramov, Y.
Nishimura, S. Irle, and H. A. Witek, Phys. Rev. Lett. 107, 175506-1-175506-5(2011).
10) Local structures and magnetic properties of fullerene-Co systems studied by
XAFS and XMCD analyses, I. Hojo, A. Koide, Y. Matsumoto, T. Maruyama,
S. Nagamatsu, S. Entani, S. Sakai, and T. Fujikawa, J. Electro. Spec. Relat.
Phenom 185, 32-38 (2012).
11) Bias voltage dependence of tunneling magnetoresistance in granular C60-Co
films with current-perpendicular-to-plane geometry, S. Sakai, S. Mitani,

Y. Matsumoto, S. Entani, P. Avramov, M. Ohtomo, H. Naramoto, and K.
Takanashi, J. Magn. Magn, Mater. 324, 1970-1974 (2012).
12) Precise control of single- and bi-layer graphene growths on epitaxial Ni(111)thin film, S. Entani, Y. Matsumoto, M. Ohtomo, P. V. Avramov, H. Naramoto,and S. Sakai, J. Appl. Phys. 111, 064324-1-064324-6 (2012) (Press release 30th,
May, 2012).
13) Structure determination of self-assembled monolayer on oxide surface by softX-ray standing wave, Y. Baba, A. Narita, T. Sekiguchi, I. Shimoyama, N. Hirao,
S. Entani, and S. Sakai, e-Journal of Surf. Sci. Nanotech. 10, 69-73 (2012).
14) Quasi-monochromatic pencil beam of laser-driven protons generated using a
conical cavity target holder, M. Nishiuchi, A. S. Pirozhkov, H. Sasaki, K. Ogura,
T. Esirkepov, T. Tanimoto, M. Kanasaki, A. Yogo, T. Hori, A. Sagisaka, Y.
Fukuda, Y. Matsumoto, S. Entani, S. Sakai, C. Brenner, D. Neely, T. Yamauchi,
S. V. Bulanov, and K. Kondo, Physics of Plasmas 19, 030706-1-030706-4(2012).
Invited Talks
1) Spin states of molecules and nanocarbons analyzed by X-ray magnetic
dichroism spectroscopy, Y. Matsumoto, Photon Factory Meeting, Tsukuba,
Japan (2012) (in Japanese).

Research Group for Mechanical Control of Materials and Spin Systems

Publication List
21 ASRC

Papers1) Universality of the spin pumping in metallic bilayer Films, T. Yoshino, K.
Ando, K. Harii, H. Nakayama, Y. Kajiwara and E. Saitoh, Appl. Phys. Lett. 98,
132503-1-132503-3 (2011).
2) Inverse spin-Hall effect induced by spin pumping in metallic system, K. Ando,
S. Takahashi, J. Ieda, Y. Kajiwara, H. Nakayama, T. Yoshino, K. Harii, Y.
Fujikawa, M. Matsuo, S. Maekawa, and E. Saitoh, J. Appl. Phys. 109, 1039131-103913-3 (2011).
3) Spin pumping by parametrically excited exchange magnons, C. W. Sandweg,
Y. Kajiwara, A. V. Chumak, A. A. Serga, V. I. Vasyuchka, M. B. Jungfleisch, E.
Saitoh, and B. Hillebrands, Phys. Rev. Lett. 106, 216601-1-216601-4 (2011).
4) Detection of spin-wave spin current in a magnetic insulator, Y. Kajiwara, S.
Takahashi, S. Maekawa, and E. Saitoh, IEEE Transaction on Magnetics 47,
1591-1594 (2011).
5) Spin current depolarization under high electric fields in undoped InGaAs,
N. Okamoto, H. Kurebayashi, K. Harii, Y. Kajiwara, H. Beere, I. Farrer, T.
Trypiniotis, K. Ando, D. A. Ritchie, C. H. W. Barnes, and E. Saitoh, Appl. Phys.
Lett. 98, 242104-1-242104-3 (2011).
6) Spin current generation due to mechanical rotation in the presence of impurity
scattering, M. Matsuo, J. Ieda, E. Saitoh, and S. Maekawa, Appl. Phys. Lett. 98,
242501-1-242501-3 (2011).
7) Frequency dependence of spin pumping in Pt/Y3Fe5O12 Film, K. Harii, T. An,
Y. Kajiwara, K. Ando, H. Nakayama, T. Yoshino, and E. Saitoh, J. Appl. Phys.
109, 116105-1-116105-3 (2011).
8) Spin Seebeck effect in thin films of the Heusler compound Co2MnSi, S. Bosu,
Y. Sakuraba, K. Uchida, K. Saito, T. Ota, E. Saitoh, and K. Takanashi, Phys.
Rev. B 83, 224401-1-224401-6 (2011).
9) Electric detection of the spin-Seebeck effect in magnetic insulator in thepresence of interface barrier, K. Uchida, T. Ota, Y. Kajiwara, H. Umezawa, H.
Kawai, and E. Saitoh, J. Phys.: Conf. Ser. 303, 012096-1-012096-4 (2011).
10) Electrically tunable spin injector free from the impedance mismatch problem,
K. Ando, S. Takahashi, J. Ieda, H. Kurebayashi, T. Trypiniotis, C.H.W. Barnes,
S. Maekawa, and E. Saitoh, Nature materials 10, 655-659 (2011).
11) Spin-dependent inertial force and spin current in accelerating systems, M.
Matsuo, J. Ieda, E. Saitoh, and S. Maekawa, Phys. Rev. B 84, 104410-1104410-9 (2011).
12) Nonlinear spin pumping induced by parametric excitation, K. Ando, T. An, E.
Saitoh, Appl. Phys. Lett. 99, 092510-1-092510-4 (2011).
13) Long-range spin Seebeck effect and acoustic spin pumping, K. Uchida, H.
Adachi, T. An, T. Ota, M. Toda, B. Hillebrands, S. Maekawa, and E. Saitoh,
Nature materials 10, 737-741 (2011).
14) Spin pumping in polycrystalline magnetic insulator/metal Pt films, Y. Kajiwara,
K. Ando, H. Nakayama, R. Takahashi, and E. Saitoh, IEEE Transaction on
Magnetics 47, 2739-2742 (2011).
15) Temporal evolution of inverse spin Hall effect voltage in a magnetic insulatornonmagnetic metal structure, M. B. Jungfleisch, A. V. Chumak, V. I. Vasyuchka,
A. A. Serga, B. Obry, H. Schultheiss, P. A. Beck, A.D. Karenowska, E. Saitoh,
and B. Hillebrands, Appl. Phys. Lett. 99, 182512-1-182512-3 (2011).
16) Surface-acoustic-wave-driven spin pumping in Y3Fe5O12/Pt hybrid structures,
K. Uchida, T. An, Y. Kajiwara, M. Toda, and E. Saitoh, Appl. Phys. Lett. 99,
212501-1-212501-3 (2011).
17) Continuous generation of spinmotive force in a patterned ferromagnetic film, Y.
Yamane, K. Sasage, T. An, K. Harii, J. Ohe, J. Ieda, S. E. Barnes, E. Saitoh, and
S. Maekawa, Phys. Rev. Lett. 107, 236602-1-236602-4 (2011).
18) Two-dimensional temperature mapping using spin-Seebeck insulator, K.
Uchida, A. Kirihara, M. Ishida, R. Takahashi, and E. Saitoh, Jpn. J. Appl. Phys.
(Rapid Communication) 50, 120211-1-120211-3 (2011).
19) Strong Correlation among structural, electronic, and magnetic properties of
Sr2Fe1+xMo1-xO6 (0<x<1), K. Yoshida, S. Ikeuchi, H. Shimizu, S. Okayasu, andT. Suzuki, J. Phys. Soc. Jpn. 80, 044716-1-044716-4 (2011).
20) Flux pinning properties of correlated pinning at low temperatures in ErBCO
films with inclined columnar defects, S. Awaji, M. Namba, K. Watanabe, H.
Kai, M. Mukaida, and S. Okayasu, J. Appl. Phys. 111, 013914-1-013914-4(2012).

21) X-ray detection capability of a BaCl2 single crystal scintillator, M. Koshimizu,
K. Onodera, F. Nishikido, R. Haruki, K. Shibuya, S. Kishimoto, and K. Asai, J.
Appl. Phys. 111, 024906-1-024906-5 (2012).
22) Fast scintillation detectors for high-energy X-ray region, S. Kishimoto, F.
Nishikido, R. Haruki, K. Shibuya, and M. Koshimizu, Hyperfine Interact. 204,101-110 (2012).
23) All-oxide system for spin pumping, Z. Qiu,Y. kajiwara, K. Ando, Y. Fujikawa,
K. Uchida, T. Tashiro, K. Harii, T. Yoshino, and E. Saitoh, Appl. Phys. Lett. 100,02240211-02240213 (2012).
24) Electroresistance effect in gold thin film induced by ionic liquid gated electric
double layer, H. Nakayama, J. Ye T. Ohtani, Y. Fujikawa, K. Ando, Y. Iwasa,
and E. Saitoh, Appl. Phys. Express 5, 023002-1-023002-3 (2012).
25) Radiation effects on film formation and nanostructural changes of iron disilicide
thin film, M. Sasase, H. Yamamoto, and S. Okayasu, Nucl. Inst. Meth. Phys.
Res. B 272, 318-321 (2012).
26) Observation of inverse spin-Hall effect in silicon, K. Ando and E. Saitoh,
Nature communications 3, 629-1-629-6 (2012).
27) Scaling fit of spin pumping in various ferromagnetic materials, T. Yoshino, K.
Ando, Y. Kajiwara, H. Nakayama, and E. Saitoh, J. Appl. Phys. 111 07C502-107C502-3 (2012).
28) Electrical determination of spin mixing conductance at metal/insulator interface
using inverse spin-Hall effect, R. Takahashi, R. Iguchi, K. Ando, H. Nakayama,
T. Yoshino, and E. Saitoh, J. Appl. Phys. 111, 07C307-1-07C307-3 (2012).
29) Acoustic spin pumping: Direct generation of spin currents from sound waves in
Y3Fe5O12/Pt hybrid structures, K. Uchida, H. Adachi, T. An, H. Nakayama, M.
Toda, B. Hillebrands, S. Maekawa, and E. Saitoh, J. Appl. Phys. 111, 053903-1053903-8 (2012).
30) Thermal artifact on the spin Seebeck effect in metallic thin films deposited on
MgO substrates S. Bosu, Y. Sakuraba, K. Uchida, K. Saito, W, Kobayashi, E.
Saitoh, and K. Takanashi, J. Appl. Phys. 111, 07B106-1-07B106-3 (2012).
Books & Reviews
1) Progress in spin current science, E. Saitoh, PARITY 26, No.1, 32-33 (2011) (inJapanese).
2) Spin injection in Mott insulator, E. Kajiwara, K. Ando, and E. Saitoh, KOTAIBUTSURI 46, 115-164 (2011) (in Japanese).
3) A new application for electron spin: Spintronics in insulators, E. Saitoh, PARITY
26, No.5, 48-51 (2011) (in Japanese).
4) E. Saitoh and K. Uchida, "Thermoelectric generation using Seebeck effectin insulators", Principle and Applications in Thermoelectoric Conversion
Technology, CMS Press, 13-23 (2011).
5) Spintronics – a new role of spin in electronics, E. Saitoh, OYO BUTSURI 81,
71-74 (2012) (in Japanese).
Invited Talks
1) Spin Seebeck effect in metallic materials, E. Saitoh, SORST Symposium, Tokyo,
Japan (2011).
2) Spin current generation from metals and insulators, E. Saitoh, International
Symposium "Nanoscience and Quantum Physics 2011", Tokyo, Japan (2011).
3) Spintronics and spin current, E. Saitoh, The 20th young forum for Advanced
material science, Funabashi, Japan (2011).
4) Spin current generation from insulators and metals, E.Saitoh, The 3rd
Scienceweb GCOE International Symposium, Sendai, Japan (2011).
5) Spintronics in Mott Insulators, E. Saitoh, PF Workshop, Tsukuba, Japan (2011).
6) Spin pumping and spin Seebeck effects in insulators and metals, E. Saitoh, 2011Materials Research Society Spring Meeting, San Francisco, USA (2011).
7) Spin Hall effect and its application, E. Saitoh, International Center for Quantum
Materials (ICQM), Beijing, China (2011).
8) Spin current generation from magnetic dynamics and heat, E. Saitoh, JSPS
York-Tohoku Research Symposium on ＆“Magnetic Materials and Spintronics”,
York, UK (2011).
9) Spin current generation from magnetic dynamics and heat, E. Saitoh, 5thInternational Workshop on Spin Current, Sendai, Japan (2011).
10) Spin current and heat: Development for new functional devices using spin

currents, E. Saitoh, JST, Tokyo, Japan (2011).
11) Physics and applications for spin current, E. Saitoh, Science summer seminor,
Nagano, Japan (2011).
12) Spin Seebeck effect, E. Saitoh, ASPIMATT school on “Advanced spintronicmaterials and transport phenomena”, Diemerstein, Germany (2011).
13) Spin current generation using heat and magnetic dynamics, E. Saitoh, 2011 OSU
Materials Week, Ohio, USA (2011).
14) Fundamental physics on spin current, E. Saitoh, JPS Autumn meeting 2011,
Toyama, Japan (2011).
15) Spin current generation using heat and magnetic dynamics E. Saitoh, 2011
International Conference on Solid State Devices and Materials (SSDM),
Nagoya, Japan (2011).
16) Possibility of realization for electronic devices using spin current, E. Saitoh,
TECH Biz EXPO 2011, Nagoya, Japan (2011).
17) Spin current generation using heat and magnetic dynamics, E. Saitoh,
Magnetism and Magnetic Materials Conference 2011, Scottsdale, Arizona(2011).
18) Spin seebeck effect, E. Saitoh, JSAP spintronics seminor, Sendai, Japan (2011).

19) Spin current physics and application, E. Saitoh, Joint Polish-Japanese Workshop:
Spintronics-from new materials to applications, Warsaw, Poland (2011).
20) Spin current physics and application, E. Saitoh, The 7th International
Conference on Advanced Materials and Devices (ICAMD2011), Jeju, Korea(2011) (Plenary Talk).
21) Spin current in metals and insulators, E. Saitoh, The FIRST-QS2C Workshop on
Emergent Phenomena of Correlated Materials, Okinawa, Japan (2011).
22) Spin current and spintronics, E. Saitoh, 15th NAISTSeminor, Nara, Japan (2011).
23) Spin current generation and utilization, E. Saitoh, Spin Caloric Transport, Bad
Honnef, Germany (2012).
24) Spin current generation from heat and magnetic dynamics, E. Saitoh, The 2nd
ASRC International Workshop on Magnetic Materials and Nanostructures(JAEA), Tokai, Japan (2012).
25) Physics and applications on spin current, E. Saitoh, Sendai, Japan (2012).
26) Spin pumping and spin Seebeck effect, E. Saitoh, American Physical Society
March Meeting, Boston, USA (2012).
27) Thermo – acoustic effect in spin current, E. Saitoh, Japan Physical Society
Annual Meeting, Kobe, Japan (2012).

Research Group for Reactions Involving Heavy Nuclei
Matsumoto, Y. Hirabayashi, K. Katō, and S. Chiba, J. Nucl. Sci. Technol. 48,
1357-1360 (2011).
20) Shell structure of even-even nickel isotopes containing twenty to forty
neutrons, O.V. Bespalova, I.N. Boboshin, V.V. Varloamov, T.A. Ermakova, B.S.
Ishkhanov, A.A. Klimochkina, S.Yu. Komarov, H. Koura, E.A. Romanovsky,
and T.I. Spasskaya, Phys. Atom. Nucl. 74, 1521-1535 (2011).
21) Effects of nuclear orientation on fusion and ﬁssion process for reactions using
238
U target nucleus, K. Nishio, J. Phys.: Conf. Ser. 312, 082007-1-082007-10(2011).
22) Proton-proton phase shifts calculations in momentum space by a rigorous
Coulomb treatment, S. Oryu, Y. Hiratsuka, S. Nishinohara, and S. Chiba, J.
Phys. G 39, 045101-1-045101-12 (2012).
23) Dynamical approach to heavy-ion induced ﬁssion using actinide target nuclei atenergies around the Coulomb barrier, Y. Aritomo, K. Hagino, K. Nishio, and S.
Chiba, Phys. Rev. C 85, 044614-1-044614-15 (2012).
24) Production of 265Sg in the 248Cm(22Ne, 5n)265Sg reaction and decay propertiesof two isomeric states in 265Sg, H. Haba, D. Kaji, Y. Kudou, K. Morimoto, K.
Morita, K. Ozeki, R. Sakai, T. Sumita, A. Yoneda, Y. Kasamatsu, Y. Komori, A.
Shinohara, H. Kikunaga, H. Kudo, K. Nishio, K. Ooe, N. Sato, and K. Tsukada,Phys. Rev. C 85, 024611-1-024611-11 (2012).
25) High-spin spectrum of 24Mg studied through multiparticle angular correlations,E. S. Diffenderfer, L. T. Baby, D. Santiago-Gonzalez, N. Ahsan, A. Rojas, A.
Volya, I. Wiedenhover, A. H. Wuosmaa, M. P. Carpenter, R. V. F. Janssens, C.
J. Lister, M. Devlin, D. G. Sarantites, L. G. Sobotka, Y. Utsuno, and M. Horoi,
Phys. Rev. C 85, 034311-1-034311-17 (2012).
26) Tilted-foil technique for producing a spin-polarized radioactive isotope beam, Y.
Hirayama, M. Mihara, Y. X. Watanabe, S. C. Jeong, H. Miyatake, S. Momota,
T. Hashimoto, N. Imai, K. Matsuta, H. Ishiyama, S. Ichikawa, T. Ishii, T.
Izumikawa, I. Katayama, H. Kawakami, H. Kawamura, I. Nishinaka, K. Nishio,
H. Makii, S. Mitsuoka, A. Osa, Y. Otokawa, and T. K. Sato, Eur. Phys. J. A 48,
54-1-54-10 (2012).

Publication List

Papers1) Effective radii of deuteron induced reactions, S. Hashimoto, M. Yahiro, K.
Ogata, K. Minomo, and S. Chiba, Phys. Rev. C 83, 054617-1-054617-11 (2011).
2) Systematic description of 6Li(n, n')dα reactions with the microscopic coupledchannels method, T. Matsumoto, D. Ichinkohorloo, Y. Hirabayashi, K. Katō,and S. Chiba, Phys. Rev. C 83, 064611-1-064611-6 (2011).
3) In-beam γ -ray spectroscopy of 35Mg and 33Na, A. Gade, D. Bazin, B.A. Brown,
C.M. Campbell, J.M. Cook, S. Ettenauer, T. Glasmacher, K.W. Kemper, S.
McDaniel, A. Obertelli, T. Otsuka, A. Ratkiewicz, J.R. Terry, Y. Utsuno, and D.
Weisshaar, Phys. Rev. C 83, 044305-1-044305-5 (2011).
4) Dynamical model of surrogate reaction, Y. Aritomo, S. Chiba, and K. Nishio,
Phys. Rev. C 84, 024602-1-024602-10 (2011).
5) Spin-dependent observables in surrogate reactions, S. Chiba, O. Iwamoto, and
Y. Aritomo, Phys. Rev. C 84, 054602-1-054602-5 (2011).
6) Radiochemical study of sub-barrier fusion hindrance in the 19F +209Bi reaction, I.
Nishinaka, Y. Kasamatsu, M. Tanikawa, S. Goto, and M. Asai, Proc. Radiochim.
Acta 1, 117-121 (2011).
7) Three-body model calculation of spin distribution in two-nucleon transfer
reaction, K. Ogata, S. Hashimoto, and S. Chiba, J. Nucl. Sci. Technol. 48, 13371342 (2011).
8) Fission of actinide nuclei with double Λ particles within the Skyrme-HartreeFock method, F. Minato and S. Chiba, Nucl. Phys. A 856, 55-67 (2011).
9) Production and decay properties of 264Hs and 265Hs, N. Sato, H. Haba, T.
Ichikawa, D. Kaji, Y. Kudou, K. Morimoto, K. Morita, K. Ozeki, T. Sumita, A.
Yoneda, E. Ideguchi, H. Koura, A. Ozawa, T. Shinozuka, T. Yamaguchi, and A.
Yoneda, J. Phys. Soc. Jpn. 80, 094201-1-094201-7 (2011).
10) Isomeric states in 253No and 253Fm, S. Antalic, F.P. Hessberger, D. Ackermann, S.
Heinz, S. Hofmann, Z. Kalaninova, B. Kindler, J. Khuyagbaatar, I. Kojouharov,
P. Kuusiniemi, M. Leino, B. Lommel, R. Mann, K. Nishio, S. Saro, B. Streicher,
B. Sulignano, and M. Venhart, Eur. Phys. J. A 47, 62-1-62-12 (2011).
11) Covariance evaluation for actinide nuclear data in JENDL-4, O. Iwamoto, T.
Nakagawa, S. Chiba, and N. Otuka, J. Kor. Phys. Soc. 59, 1224-1229 (2011).
12) Self-consistent analyses of nuclear level structures, and nucleon interaction dataof even-even Sn Isotopes, J.-Y. Lee, E.Sh. Soukhovitskij, Y. Kim, R. Capote, S.
Chiba, and J.M. Quesada, J. Kor. Phys. Soc. 59, 1019-1022 (2011).
13) Status of JENDL high energy file, Y. Watanabe, K. Kosako, S. Kunieda,
S. Chiba, R. Fujimoto, H. Harada, M. Kawai, F. Maekawa, T. Murata, H.
Nakashima, K. Niita, N. Shigyo, S. Shimakawa, N. Yamano, and T. Fukahori, J.
Kor. Phys. Soc. 59, 1040-1045 (2011).
14) JENDL-4.0: A new library for innovative nuclear energy systems, K. Shibata,O. Iwamoto, T. Nakagawa, N. Iwamoto, A. Ichihara, S. Kunieda, S. Chiba, and
J. Katakura, J. Kor. Phys. Soc. 59, 1046-1051 (2011).
15) Measurements of inelastic neutron scattering at 96 MeV from carbon, iron,yttrium and lead, A. Ohrn, C. Gustavsson, M. Blann, V. Blideanu, J. Blomgren,
S. Chiba, H. Duarte, F. Haddad, C. Kalbach, J. Klug, A. Koning, C. Le brun, C.
Lebrun, F. R. Lecolley, X. Ledoux, N. Marie-noury, P. Mermod, L. Nilsson, M.
Osterlund, S. Pomp, A. Prokoﬁev, U. Tippawan, and Y. Watanabe, J. Kor. Phys.
Soc. 59, 1817-1820 (2011).
16) Neutron production in the lunar subsurface from alpha particles in galactic
cosmic rays, S. Ota, S. Kobayashi, L. Sihver, N. Yamashita, and N. Hasebe,
Earth Planets Space 63, 25-35 (2011).
17) Charge resolution of CR-39 plastic nuclear track detectors for intermediate
energy heavy ions, S. Ota, N. Yasuda, L. Sihver, S. Kodaira, M. Kurano, S.
Naka, Y. Ideguchi, E. R. Benton, and N. Hasebe, Nucl. Instr. Meth. B 269, 13821388 (2011).
18) Spin-polarization of radioactive 123Ing.s. by the tilted-foil method, Y. Hirayama,
M. Mihara, Y.X. Watanabe, S.C. Jeong, N. Imai, K. Matsuta, H. Miyatake, T.
Hashimoto, H. Ishiyama, S. Ichikawa, T. Ishii, T. Izumikawa, I. Katayama, H.
Kawakami, I. Nishinaka, K. Nishio, H. Makii, S. Mitsuoka, S. Momota, A. Osa, Y.
Otokawa, T.K. Sato, and Y. Wakabayashi, Eur. Phys. J. A 47, 138-1-138-5 (2011).
19) Analysis of n+ 6 Li reactions in three-body model, D. Ichinkhorloo, T.

Books & Reviews
1) From my experience of monitoring environmental radiation levels after the
Fukushima-Daiichi nuclear accident, S. Mitsuoka, Nuclear Data News 100, 2730 (2011) (in Japanese).
2) Recent study of nuclear masses—Report of RIBF-ULIC Symposium: Physics ofRare-RI Ring, H. Koura, Nuclear Data News 101, 20-30 (2012) (in Japanese).
3) Nucleosynthesis in supernovae and neutrino oscillation, T. Suzuki, T. Yoshida,
S. Chiba, and T. Kajino, BUTSURI 67, 49-54 (2011) (in Japanese).
4) Surrogate method, S. Chiba, in Soryushiron Kenkyu, Electronic Edition, Vol. 10,
No. 2 (2011).
Invited Talks
1) Nuclear orientation in fusion and synthesis of heavy element at sub-barrierenergy, K. Nishio, The 7th International Conference on Dynamic Aspects of
Nuclear Fission, Smolenice, Slovakia (2011).
2) Recent development in the shell model: shell evolution and methodology,
Y. Utsuno, ECT* Workshop "Nuclear Structure Seen through Ground-State
Properties of Exotic Nuclei", Trento, Italy (2011).
3) Long-term needs for nuclear data development, S. Chiba, Technical Meeting on
Long-Term Needs for Nuclear Data Development, Vienna, Austria (2011).
4) Current status of nuclear mass formulae, H. Koura, RIKEN RIBF-ULICSymposium "Physics of Rare-RI Ring", Wako, Japan (2011).
5) Surrogate reaction and nuclear data research in the future, S. Chiba, The 1st
International Symposium on the Science with KoRIA, Sejong, Korea (2011).
6) Fission research activity at JAEA, K. Nishio, The 5th ASRC International
Workshop "Perspectives in Nuclear Fission", Tokai, Japan (2012).
7) Surrogate research study at JAEA, S. Chiba, The 5th ASRC International
Workshop "Perspectives in Nuclear Fission", Tokai, Japan (2012).

ASRC 22

Research Group for Superheavy Elements

Publication List

Papers1) Fluorido complex formation of element 104, rutherfordium (Rf), Y. Ishii, A.
Toyoshima, K. Tsukada, M. Asai, Z. J. Li, Y. Nagame, S. Miyashita, T. Mori, H.
Suganuma, H. Haba, S. Goto, H. Kudo, K. Akiyama, Y. Oura, A. Shinohara, M.
Schädel, V. Pershina, and J. V. Kratz, Bull. Chem. Soc. Jpn. 84, 903-911 (2011).
2) Production and decay properties of 264Hs and 265Hs, N. Sato, H. Haba, T.
Ichikawa, D. Kaji, Y. Kudou, K. Morimoto, K. Morita, K. Ozeki, T. Sumita, A.
Yoneda, E. Ideguchi, H. Koura, A. Ozawa, T. Shinozuka, T. Yamaguchi, and A.
Yoshida, J. Phys. Soc. Jpn. 80, 094201-1-094201-7 (2011).
3) Production and properties of transuranium elements, Y. Nagame and M. Hirata,
Radiochim. Acta 99, 377-393 (2011).
4) Spin-polarization of radioactive 123Ing.s. by the tilted-foil method, Y. Hirayama,
M. Mihara, Y.X. Watanabe, S.C. Jeong, N. Imai, K. Matsuta, H. Miyatake, T.
Hashimoto, H. Ishiyama, S. Ichikawa, T. Ishii, T. Izumikawa, I. Katayama, H.
Kawakami, I. Nishinaka, K. Nishio, H. Makii, S. Mitsuoka, S. Momota, A. Osa, Y.
Otokawa, T.K. Sato, and Y. Wakabayashi, Eur. Phys. J. A 47, 138-1-138-5 (2011).
5) Search for a 2-quasiparticle high-K isomer in 256Rf, A. P. Robinson, T. L.
Khoo, D. Seweryniak, I. Ahmad, M. Asai, B. B. Back, M. P. Carpenter, P.
Chowdhury, C. N. Davids, J. Greene, P. T. Greenlees, K. Hauschild, A. Heinz,
R.-D. Herzberg, R. V. F. Janssens, D. G. Jenkins, G. D. Jones, S. Ketelhut, F. G.
Kondev, T. Lauritsen, C. J. Lister, A. Lopez-Martens, P. Marley, E. McCutchan,
P. Papadakis, D. Peterson, J. Qian, D. Rostron, U. Shirwadkar, I. Stefanescu, S.
K. Tandel, X. Wang, and S. Zhu, Phys. Rev. C 83, 064311-1-064311-7 (2011).
6) The recoil transfer chamber. An interface to connect the physical preseparator
TASCA with chemistry and counting setups, J. Even, J. Ballof, W. Brüchle, R.
A. Buda, Ch.E. Düllmann, K. Eberhardt, A. Gorshkov, E. Gromm, D. Hild, E.
Jäger, J. Khuyagbaatar, J.V. Kratz, J. Krier, D. Liebe, M. Mendel, D. Nayak,
K. Opel, J.P. Omtvedt, P. Reichert, J. Runke, A. Sabelnikov, F. Samadani, M.
Schädel, B. Schausten, N. Scheid, E. Schimpf, A. Semchenkov, P. ThörlePospiech, A. Toyoshima, A. Türler, V. Vicente Vilas, N. Wiehl, T. Wunderlich,and A. Yakushev, Nucl. Instrum. Methods A 638, 157-164 (2011).
7) Radiochemical study of sub-barrier fusion hindrance in the 19F+209Bi reaction,
I. Nishinaka, Y. Kasamatsu, M. Tanikawa, S. Goto, and M. Asai, Proc.
Radiochem. Acta 1, 117-122 (2011).
8) Solvent extraction of trivalent actinides with di(2-ethylhexyl) phosphoricacid, R. Takayama, K. Ooe, W. Yahagi, H. Fujisawa, Y. Komori, H. Kikunaga,
T. Yoshimura, N. Takahashi, K. Takahisa, H. Haba, Y. Kudou Y. Ezaki, A.
Toyoshima, M.Asai, Y. Nagame, T. Saito, T. Mitsugashira, and A. Shinohara,

Proc. Radiochem. Acta 1, 157-160 (2011).
9) Production of 265Sg in the 248Cm(22Ne, 5n)265Sg reaction and decay propertiesof two isomeric states in 265Sg, H. Haba, D. Kaji, Y. Kudou, K. Morimoto, K.
Morita, K. Ozeki, R. Sakai, T. Sumita, A. Yoneda, Y. Kasamatsu, Y. Komori, A.
Shinohara, H. Kikunaga, H. Kudo, K. Nishio, K. Ooe, N. Sato, and K. Tsukada,Phys. Rev. C 85, 024611-1-024611-11 (2012).
10) First experiment at TASCA towards x-ray ﬁngerprinting of element 115 decay
chains, U. Forsberg, P. Golubev, L.G. Sarmiento, J. Jeppsson, D. Rudolph,
L.-L. Andersson, D. Ackermann, M. Asai, M. Block, K. Eberhardt, J. Even,
Ch.E. Düllmann, J. Dvorak, J.M. Gates, K.E. Gregorich, R.-D. Herzberg, F.P.
Heßberger, E. Jäger, J. Khuyagbaatar, I. Kojouharov, J.V. Kratz, J. Krier, N. Kurz,
S. Lahiri, B. Lommel, M. Maiti, E. Merchán, J.P. Omtvedt, E. Parr, J. Runke, H.
Schaffner, M. Schädel, and A. Yakushev, Acta Phys. Pol. B 43, 305-311 (2012).
11) Sulfate complexation of element 104, Rf, in H2SO4/HNO3 mixed solution, Z.
J. Li, A. Toyoshima, M. Asai, K. Tsukada, T. K. Sato, N. Sato, T. Kikuchi, Y.
Nagame, M. Schädel, V. Pershina, X. H. Liang, Y. Kasamatsu, Y. Komori, K.
Ooe, A. Shinohara, S. Goto, H. Murayama, M. Murakami, H. Kudo, H. Haba, Y.
Takeda, M. Nishikawa, A. Yokoyama, S. Ikarashi, K. Sueki, K. Akiyama, and J.
V. Kratz, Radiochim. Acta 100, 157-164 (2012).
12) Tilted-foil technique for producing a spin-polarized radioactive isotope beam, Y.
Hirayama, M. Mihara, Y. X. Watanabe, S. C. Jeong, H. Miyatake, S. Momota,
T. Hashimoto, N. Imai, K. Matsuta, H. Ishiyama, S. Ichikawa, T. Ishii, T.
Izumikawa, I. Katayama, H. Kawakami, H. Kawamura, I. Nishinaka, K. Nishio,
H. Makii, S. Mitsuoka, A. Osa, Y. Otokawa, and T. K. Sato, Eur. Phys. J. A 48,
54-1-54-10 (2012).
Books & Reviews
1) Y. Nagame, M. Hirata, and H. Nakahara, "Production and Chemistry ofTransuranium Elements", in "Handbook of Nuclear and Radiochemistry(Second Ed.)", edited by A. Vértes, S. Nágy, Z. Klencsar, R. G, Lovas, and F.
Rösch, Springer, (Dordrecht), Vol. 2, pp. 817-875 (2011).
Invited Talks
1) Liquid phase experiments with the heaviest elements, Y. Nagame, The 4thInternational Conference on the Chemistry and Physics of the Transactinide
Elements (TAN11), Sochi, Russia (2011).
2) Chemistry and physics of (super-)heavy elements, M. Schädel, Summer School
on Actinide Science and Applications 2011, Karlsruhe, Germany (2011).

Research Group for Actinide Materials Science
Papers1) Properties of ferromagnetic superconductors, D. Aoki, F. Hardy, A. Miyake, V.
Taufour, T.D. Matsuda, and J. Flouquet, C. R. Physique 12, 573-583 (2011).
2 Pressure evolution of the magnetic field induced ferromagnetic fluctuation
through the pseudo-metamagnetism of CeRu2Si2, D. Aoki, C. Paulsen, T.D.
Matsuda, L. Malone, G. Knebel, P. Haen, P. Lejay, R. Settai, Y. Ōnuki, and J.
Flouquet, J. Phys. Soc. Jpn. 80, 053702-1-053702-4 (2011).
3) Superconductivity reinforced by magnetic field and the magnetic instability
in uranium ferromagnets, D. Aoki, T.D. Matsuda, F. Hardy, C. Meingast, V.
Taufour, E. Hassinger, I. Sheikin, C. Paulsen, G. Knebel, H. Kotegawa, and J.
Flouquet, J. Phys. Soc. Jpn. 80, Suppl. A, SA008-1- SA008-6 (2011).
4) Ferromagnetic Quantum Critical Endpoint in UCoAl, D. Aoki, T. Combier, V.
Taufour, T.D. Matsuda, G. Knebel, H. Kotegawa, and J. Flouquet, J. Phys. Soc.
Jpn. 80, 094711-1-094711-10 (2011).
237
5)
Np nuclear relaxation rate in heavy fermion superconductor NpPd5Al2, H. Chudo,
Y. Tokunaga, S. Kambe, H. Sakai, Y. Haga, T. Matsuda, Y. Ōnuki, H. Yasuoka, D.
Aoki, Y. Homma, and R. Walstedt, Phys. Rev. B 84, 094402-1-094402-5 (2011).
6) Electronic structure of heavy Fermion uranium compounds studied by corelevel photoelectron spectroscopy, S.-I. Fujimori, T. Ohkochi, I. Kawasaki, A.
Yasui, Y. Takeda, T. Okane, Y. Saitoh, A. Fujimori, H. Yamagami, Y. Haga, E.
Yamamoto, Y. Tokiwa, S. Ikeda, T. Sugai, H. Ohkuni, N. Kimura, and Y. Ōnuki,
J. Phys. Soc. Jpn. 81, 014703-1-014703-9 (2011).
7) Crystal structure and physical properties of trigonal NpGa3 and Np3Ga11, Y.
Haga, D. Aoki, Y. Homma, T.D. Matsuda, S. Ikeda, H. Sakai, E. Yamamoto,
A. Nakamura, Y. Shiokawa, and Y. Ōnuki, J. Phys. Soc. Jpn. 80, Suppl. A,
SA109-1- SA109-3 (2011).
8) Possible long-periodic magnetic atructure in SmPb3, T.U. Ito, W. Higemoto, K.
Ninomiya, A. Amato, T. Sugai, Y. Haga, and H.S. Suzuki, J. Phys. Soc. Jpn. 80,
Suppl. A, SA075-1- SA075-3 (2011).
9) T-dependent nuclear hyperﬁne coupling at the In site in CeIrIn5, S. Kambe, H.
Sakai, Y. Tokunaga, T.D. Matsuda, Y. Haga, T. Takeuchi, Y. Ōnuki, and R.E.
Walstedt, J. Phys. Soc. Jpn. 80, Suppl. A, SA009-1- SA009-3 (2011).
10) Band structure and Fermi surface of URu2Si2 studied by soft x-ray angleresolved photoemission spectroscopy, I. Kawasaki, S.-I. Fujimori, Y. Takeda, T.
Okane, A. Yasui, Y. Saitoh, H. Yamagami, Y. Haga, E. Yamamoto, and Y. Ōnuki,
Phys. Rev. B 83, 235121-1-235121-6 (2011).
11) Pressure-induced structural phase transitions in UIr, H. Kotegawa, S. Araki, T.
Akazawa, A. Hori, Y. Irie, S. Fukushima, H. Hidaka, T. Kobayashi, K. Takeda,
Y. Ohishi, K. Murata, E. Yamamoto, S. Ikeda, Y. Haga, R. Settai, and Y. Ōnuki,
Phys. Rev. B 84, 054524-1-054524-5 (2011).
12) Evidence for spin-glass state in nonmagnetic atom disorder compound Pr2AgIn3,
D.X. Li, T. Yamamura, K. Yubuta, S. Nimori, Y. Haga, and T. Shikama, J. Phys.:Conf. Ser. 320, 012041-1-012041-6 (2011).
13) Thermoelectric evidence for high-field anomalies in the hidden order phase of

23 ASRC

URu2Si2, L. Malone, T.D. Matsuda, A. Antunes, G. Knebel, V. Taufour, D. Aoki, K.
Behnia, C. Proust, and J. Flouquet, Phys. Rev. B 83, 245117-1-245117-5 (2011).
14) Details of sample dependence and transport properties of URu2Si2, T.D. Matsuda, E.
Hassinger, D. Aoki, V. Taufour, G. Knebel, N. Tateiwa, E. Yamamoto, Y. Haga, Y.
Ōnuki, Z. Fisk, and J. Flouquet, J. Phys. Soc. Jpn. 80, 114710-1-114710-10 (2011).
15) Detailed characterization of U-Co binary compounds, T.D. Matsuda, T. Sugai, Y. Haga,
E. Yamamoto, and Y. Ōnuki, J. Phys. Soc. Jpn. 80, Suppl. A, SA101-1- SA101-3 (2011).
16) 9Be-NMR spin-lattice relaxation rate in heavy-fermion superconductor UBe13,
K. Morita, Y. Hara, Z. Sakano, H. Kotegawa, H. Tou, Y. Haga, and Y. Ōnuki, J.
Phys. Soc. Jpn. 80, Suppl. A, SA099-1- SA099-3 (2011).
17) Magnetic properties of barium uranate Ba2U2O7, A. Nakamura, Y. Doi, and Y.
Hinatsu, J. Sol. State Chem. 184, 531–535 (2011).
18) Strong longitudinal magnetic fluctuations near critical end point in UCoAl:
A 59Co-NMR study, H. Nohara, H. Kotegawa, H. Tou, T.D. Matsuda, E.
Yamamoto, Y. Haga, Z. Fisk, Y. Ōnuki, D. Aoki, and J. Flouquet, J. Phys. Soc.
Jpn. 80, 093707-1-093707-4 (2011).
19) Characteristic heavy fermion properties in YbCu2Si2 and YbT2Zn20 (T : Co,
Rh, Ir), Y. Ōnuki, S. Yasui, M. Matsushita, S. Yoshiuchi, M. Ohya, Y. Hirose,
N.D. Dung, F. Honda, T. Takeuchi, R. Settai, K. Sugiyama, E. Yamamoto, T.D.
Matsuda, Y. Haga, T. Tanaka, Y. Kubo, and H. Harima, J. Phys. Soc. Jpn. 80,
Suppl. A, SA003-1- SA003-6 (2011).
20) High field magnetoresistance and de Haas-van Alphen effect in LaRu2Al10, M.
Sakoda, S. Tanaka, E. Matsuoka, H. Sugawara, H. Harima, F. Honda, R. Settai, Y.
Ōnuki, T.D. Matsuda, and Y. Haga, J. Phys. Soc. Jpn. 80, 084716-1-084716-5 (2011).
21) Maki parameter and upper critical field of the heavy-Fermion superconductor
UBe13, Y. Shimizu, Y. Ikeda, T. Wakabayashi, Y. Haga, K. Tenya, H. Hidaka, T.
Yanagisawa, and H. Amitsuka, J. Phys. Soc. Jpn. 80, 093701-1-093701-4 (2011).
22) Speciﬁc heat and magnetization studies of the superconducting mixed state of UBe13,
Y. Shimizu, Y. Ikeda, T. Wakabayashi, K. Tenya, Y. Haga, H. Hidaka, T. Yanagisawa,
and H. Amitsuka, J. Phys. Soc. Jpn. 80, Suppl. A, SA100-1- SA100-3 (2011).
23) Magnetic-field-induced metallic state in β-US2, K. Sugiyama, Y. Hirose, K.
Enoki, S. Ikeda, E. Yamamoto, N. Tateiwa, Y. Haga, T. Kida, M. Hagiwara,
K. Kindo, F. Honda, R. Settai, and Y. Ōnuki, J. Phys. Soc. Jpn. 80, Suppl. A,
SA104-1- SA104-3 (2011).
24) Non-magnetic to magnetic transition under high pressure in narrow-gap
semiconductor β-US2, N. Tateiwa, Y. Haga, H. Sakai, S. Ikeda, T.D. Matsuda, E.
Yamamoto, and Y. Ōnuki, J. Phys. Soc. Jpn. 80, Suppl. A, SA103-1- SA103-3 (2011).
25) Miniature ceramic-anvil high-pressure cell for magnetic measurements in acommercial superconducting quantum interference device magnetometer, N. Tateiwa,
Y. Haga, Z. Fisk, and Y. Ōnuki, Rev. Sci. Instrum. 82, 053906-1-053906-8 (2011).
26) Ultrasonic measurements on the cage-structured clathrate compound U3Pd20Si6,
T. Yanagisawa, N. Tateiwa, T. Mayama, H. Saito, H. Hidaka, H. Amitsuka,
Y. Haga, Y. Nemoto, and T. Goto, J. Phys. Soc. Jpn. 80, Suppl. A, SA105-1SA105-3 (2011).

27) Electronic structure of YbCu 2 Ge 2 studied by soft x-ray angle-resolved
photoemission spectroscopy, A. Yasui, S.-I. Fujimori, I. Kawasaki, T. Okane, Y.
Takeda, Y. Saitoh, H. Yamagami, A. Sekiyama, R. Settai, T. Matsuda, Y. Haga,
and Y. Ōnuki, Phys. Rev. B 84, 195121-1-195121-6 (2011).
28) Ultrahigh-resolution laser photoemission study of URu2Si2 across the hiddenorder transition, R. Yoshida, Y. Nakamura, M. Fukui, Y. Haga, E. Yamamoto,Y. Ōnuki, M. Okawa, S. Shin, M. Hirai, Y. Muraoka, and T. Yokoya, J. Phys.
Chem. Solid. 72, 580–581 (2011).
29) Electrical and magnetic properties of quasicrystal approximants RCd6 (R:Rare Earth), A. Mori, H. Ota, S. Yoshiuchi, K. Iwakawa, Y. Taga, Y. Hirose, T.
Takeuchi, E. Yamamoto, Y. Haga, F. Honda, R. Settai, and Y. Ōnuki, J. Phys.
Soc. Jpn. 81, 024720-1-024720-10 (2012).
30) Strong correlation between anomalous quasiparticle scattering andunconventional superconductivity in the hidden-order phase of URu2Si2, N.

Tateiwa, T. Matsuda, Y. Ōnuki, Y. Haga, and Z. Fisk, Phys. Rev. B 85, 0545161-054516-5 (2012).
Books & Reviews
1) Miniature ceramic anvil high-pressure cell (mCAC) for magnetic measurements,
N. Tateiwa and Y. Haga, KOTAI BUTSURI 46, 791-799 (2011) (in Japanese).
Invited Talks
1) Unconventional superconducting characteristics of heavy fermion actinide
superconductors, Y. Haga, Heavy Fermion Physics: Perspective and Outlook,
Beijing, China (2012).
2) Strong correlation between anomalous quasiparticle scattering andunconventional superconductivity in hidden order phase of URu2Si2, N. Tateiwa,
Heavy Fermion Physics: Perspective and Outlook, Beijing, China (2012).

Research Group for Condensed Matter Physics of Heavy Element Systems
12) Possible long-periodic magnetic structure in SmPb3, T. U. Ito, W. Higemoto, K.
Ninomiya, A. Amato, T. Sugai, Y. Haga, and H. S. Suzuki, J. Phys. Soc. Jpn. 80,
Suppl. A, SA075-1-075-3 (2011).
13) Dilute La-substitutions in CeRhIn5 studied by means of NMR/NQR techniques, H.
Sakai, N. Kurita, C. F. Miclea, R. Movshovich, H.-O. Lee, F. Ronning, E. D. Bauer,
and J. D. Thompson, J. Phys. Soc. Jpn. 80, Suppl. A, SA059-1-059-3 (2011).
14) T-dependent nuclear hyperﬁne coupling at the In site in CeIrIn5, S. Kambe, H.
Sakai, Y. Tokunaga, T.D. Matsuda, Y. Haga, T. Takeuchi, Y. Ōnuki, and R.E.
Walstedt, J. Phys. Soc. Jpn. 80, Suppl. A, SA009-1-009-3 (2011).
15) Non-magnetic to magnetic transition under high pressure in narrow-gap
semiconductor β-US2, N. Tateiwa, Y. Haga, H. Sakai, S. Ikeda, T.D. Matsuda, E.
Yamamoto, and Y. Ōnuki, J. Phys. Soc. Jpn. 80, Suppl. A, SA103-1-103-3 (2011).
16) Crystal structure and physical properties of trigonal NpGa3 and Np3Ga11, Y. Haga, D.
Aoki, Y. Homma, T. D. Matsuda, S. Ikeda, H. Sakai, E. Yamamoto, A. Nakamura,Y. Shiokawa, and Y. Ōnuki, J. Phys. Soc. Jpn. 80, Suppl. A, SA109-1-109-3 (2011).
17) NMR study on AmO2: comparison with UO2 and NpO2, Y. Tokunaga, T. Nishi,
S. Kambe, M. Nakada, Y. Homma, H. Sakai, and H. Chudo, J. Phys. Soc. Jpn.
80, Suppl. A, SA110-1-110-3 (2011).
18) Present situation of radioactivity measurements, K. Ninomiya, Web. Site of
Science Council of Japan (2011).
19) Quasi-one-dimensional spin dynamics in LiV2O4: one-to-three-fimensionalcrossover as a possible origin of heavy Fermion state, R. Kadono, A. Koda,
W. Higemoto, K. Ohishi, H. Ueda, C. Urano, S.-i Kondo, M. Nohara, and H.
Takagi, J. Phys. Soc. Jpn. 81, 014709-1-014709-4 (2012).

Publication List

Papers1) NMR determination of noncollinear antiferromagnetic structure in TbCoGa5, Y.
Tokunaga, Y. Saito, H. Sakai, S. Kambe, N. Sanada, R. Watanuki, K. Suzuki, Y.
Kawasaki, and Y. Kishimoto, Phys. Rev. B 84, 214403-1-214403-7 (2011).
2) μSR evidence of nonmagnetic order and 141Pr hyperfine-enhanced nuclear
magnetism in the Cubic Γ3 ground doublet system PrTi2Al20, T. U. Ito, W.
Higemoto, K. Ninomiya, H. Luetkens, C. Baines, A. Sakai, and S. Nakatsuji, J.
Phys. Soc. Jpn. 80, 113703-1-113703-4 (2011).
3) Magnetic-field-induced enhancements of nuclear spin-lattice relaxation rates
in the heavy-fermion superconductor CeCoIn5 using 59Co nuclear magnetic
resonance, H. Sakai, S. E. Brown, S.-H. Baek, F. Ronning, E. D. Bauer, and J.
D. Thompson, Phys. Rev. Lett. 107, 137001-1-137001-4 (2011).
4) Li(Zn,Mn)As as a new generation ferromagnet based on a I-II-V semiconductor,
Z. Deng, C. Q. Jin, Q. Q. Liu, X. C. Wang, J. L. Zhu, S. M. Feng, L. C. Chen,
R. C. Yu, C. Arguello, T. Goko, Fanlong Ning, Jinsong Zhang, Yayu Wang,
A. A. Aczel, T. Munsie, T. J. Williams, G. M. Luke, T. Kakeshita, S. Uchida,
W. Higemoto, T. U. Ito, Bo Gu, S. Maekawa, G. D. Morris, and Y. J. Uemura,
Nature Communications 2, 422 (2011).
5) 237Np nuclear relaxation rate in heavy fermion superconductor NpPd5Al2, H. Chudo,
Y. Tokunaga, S. Kambe, H. Sakai, Y. Haga, T. D. Matsuda, Y. Ōnuki, H. Yasuoka, D.
Aoki and Y. Homma, and R. E. Walstedt, Phys. Rev. B 84, 094402-1-094402-5 (2011).
6) Absence of pure quadrupole ordering in SmSn3: Dipole-dipole and quadrupolequadrupole interactions in Sm-based compounds, T. U. Ito, W. Higemoto, K.
Ninomiya, and H. S. Suzuki, Phys. Rev. B 84, 064411-1-064411-5 (2011).
7) Introduction of the research group for condensed matter physics in heavy
elements system in ASRC, S. Kambe, “MESON” (Society of Muon and Meson
Science of Japan) 34, 17-22 (2011) (in Japanese).
8) Stabilization of commensurate antiferromagnetism in CePt2In7 by Pressure Up
to 2.4 GPa: 115In NMR and NQR under zero ﬁeld, H. Sakai, Y. Tokunaga, S.
Kambe, H.-O. Lee, V. A. Sidorov, P. H. Tobash, F. Ronning, E. D. Bauer, and J.
D. Thompson, Phys. Rev. B 83, 140408-1 140408-4(R) (2011).
9) Electronic inhomogeneity in a Kondo lattice, E. D. Bauer, Y.-f. Yang, C. Capan,
R. R. Urbano, C. F. Miclea, H. Sakai, F. Ronning, M. J. Graf, A. V. Balatsky, R.
Movshovich, A. D. Bianchi, A. P. Reyes, P. L. Kuhns, J. D. Thompson, and Z.
Fisk, Proceedings of the National Academy of Sciences of the United States ofAmerica 108, 6857-1-6857-5 (2011).
10) Incommensurate-to-commensurate magnetic phase transition in SmIn3 observed bymuon spin relaxation, T. U. Ito, W. Higemoto, K. Ninomiya, L. Hubertus, T. Sugai,
Y. Haga, and H. S. Suzuki, J. Phys. Soc. Jpn. 80, 033710-1-033710-4 (2011).
11) Suppression of time-reversal symmetry breaking superconductivity in Pr(Os1xRux)4Sb12 and Pr1-yLayOs4Sb12, L. Shu, W. Higemoto, Y. Aoki, A. D. Hillier, K.
Ohishi, K. Ishida, R. Kadono, A. Koda, O. O. Bernal, D. E. MacLaughlin, Y.
Tunashima, Y. Yonezawa, S. Sanada, D. Kikuchi, H. Sato, H. Sugawara, T. U.
Ito, and M. B. Maple, Phys. Rev. B 83, 10050-1-100504-4(R) (2011).

Invited Talks
1) Anisotropy of spin ﬂuctuations in the heavy Fermion systems: Nuclear magnetic
resonance study, H. Sakai, TOKIMEKI2011 International Workshop on Heavy
Fermions, Osaka, Japan, (2011).
2) Ligand and actinide NMR studies in actinide oxides and intermetallic
compounds, S. Kambe, American Chemical Society Fall Meeting, Denver, USA(2011).
3) NMR studies in actinide dioxides, Y. Tokunaga, 6th Workshop on Speciation,
Techniques, and Facilities for Radioactive Materials at Synchrotron Light
Sources and Other Quantum Beam Sources (AnXAS2011), Hyogo, Japan (2011).
4) Solid-state NMR study of actinide dioxides, Y. Tokunaga, MRS Spring Meeting,
San-Francisco, USA (2012).
5) Spin ﬂuctuation, orbital states and non-conventional superconductivity in actinides
compounds, S. Kambe, MRS Spring Meeting, San-Francisco, USA (2012).
6) No-collinear antiferromagnetic structure in TbCoGa5, Y. Tokunaga, The 3rd
ASRC International Workshop, Grenoble, France (2012).
7) Our recent progress of NMR measurements under extreme condition in our
research activity in ASRC-JAEA, H. Sakai, The 3rd ASRC International
Workshop, Grenoble, France (2012).

Research Group for Hadron Physics
Papers1) Identified charged hadron production in p+p collisions at √s=200 and 62.4 GeV, A.
Adare, K. Imai, S. Sato, K. Tanida et al., Phys. Rev. C 83, 064903-1-064903-29 (2011).
2) Azimuthal correlations of electrons from heavy ﬂavor decay with hadrons in
p+p and Au+Au collisions at √sNN=200 GeV, A. Adare, K. Imai, K. Tanida, etal., Phys. Rev. C 83, 044912-1-044912-16 (2011).
3) Measurement of neutral mesons in p+p collisions at √s=200 GeV and scaling
properties of hadron production, A. Adare, K. Imai, S. Sato, K. Tanida, et al.,Phys. Rev. D 83, 052004-1-052004-26 (2011).
4) Event structure and double helicity asymmetry in jet production from polarized
p+p collisions at √s=200 GeV, A. Adare, K. Imai, S. Sato, K. Tanida, et al.,Phys. Rev. D 84, 012006-1-012006-16 (2011).
5) Suppression of away-side jet fragments with respect to the reaction plane in
Au+Au collisions at √sNN=200 GeV, A. Adare, K. Imai, K. Tanida, et al., Phys.
Rev. C 84, 024904-1-024904-12 (2011).
6) Production of omega meson in p+p, d+Au, Cu+Cu, and Au+Au collisions at√sNN=200 GeV, A. Adare, K. Imai, S. Sato, K. Tanida, et al., Phys. Rev. C 84,
044902-1-044902-11 (2011).
7) Cold nuclear matter effects on J/psi yields as a function of rapidity and nuclear
geometry in d+A collisions at √sNN=200 GeV, A. Adare, K. Imai, K. Tanida, etal., Phys. Rev. Lett. 107, 142301-1-142301-7 (2011).
8) Heavy-quark production in p+p and energy loss and ﬂow of heavy quarks in

Au+Au collisions at √sNN =200 GeV, A. Adare, K. Imai, S. Sato, K. Tanida, etal., Phys. Rev. C 84, 044905-1-044905-42 (2011).
9) Suppression of back-to back hadron pairs at forward rapidity in d+Au collisionsat √sNN =200 GeV, A. Adare, K. Imai, K. Tanida, et al., Phys. Rev. Lett. 107,172301-1-172301-7 (2011).
10) Multi-antikaonic nuclei and in-medium kaon properties in dense matter, T.
Muto, T. Maruyama, and T. Tatsumi, J. Phys.: Conf. Ser. 312, 022018-1022018-6 (2011).
11) Liquid-gas mixed phase in nuclear matter at ﬁnite temperature, T. Maruyama
and T. Tatsumi, J. Phys.: Conf. Ser. 312, 042015-1-042015-6 (2011).
12) Pasta structures of quark-hadron phase transition in proto-neutron stars, N. Yasutake,
T. Maruyama, and T. Tatsumi. J. Phys.: Conf. Ser. 312, 042027-1-042027-6 (2011).
13) Effect of Λ(1405) on the structure of multi-antikaonic nuclei, T. Muto, T.
Maruyama, and T. Tatsumi, AIP Conf. Proc. 1374, 197-200 (2011).
14) J-PARC facilities and physics, S. Sato, Nucl. Phys. A 862, 238-243 (2011).
15) CANGAROO-III observation of TeV gamma rays from the unidentiﬁed gammaray source HESS J1614-518, T. Mizukami, R. Kiuchi, et al., Astrophys. J. 740,
78-1-78-9 (2011).
16) J-PARC Status, Nuclear and Particle Physics, S. Sato, AIP Conf. Proc. 1336,
560-564 (2011).
17) J-PARC and its prospect of particle and nuclear physics, K. Imai, AIP Conf.
Proc. 1342, 32-36 (2011).

ASRC 2418) Heavy ion microbeam system for cell irradiation at Kyoto University, M.
Nakamura, K. Imai, M. Hirose, H. Matsumoto, M. Tosaki, D. Ohsawa, S.
Makino, Nucl. Instr. Meth. Phys. Res. B 269, 3153-3157 (2011).
19) Spin-density matrix elements for γp → K*0Σ+ at Eγ=1.85-3.0 GeV with evidence
for the κ(800) meson exchange., S.H. Hwang, K. Hicks, K. Imai, et al., Phys.
Rev. Lett. 108, 092001-1- 092001-5 (2012).
20) Searches for very high energy gamma rays from blazars with CANGAROOIII telescope in 2005-2009, Y. Mizumura, R. Kiuchi, et al., Astropart. Phys. 35,
563-572 (2012).
21) Development of a tracking detector system with multichannel scintillation ﬁbers
and PPD, R. Honda, S. Callier, S. Hasegawa, M. Ieiri, Y. Matsumoto, K. Miwa,
I. Nakamura, L. Raux, C. DeLaTaille, M. Tanaka, T. Uchida, and K. Yoshimura,
Nucl. Instr. Meth. Phys. Res. A, in press.
22) Search for θ+ via the pion induced reaction at J-PARC : J-PARC E19, K. Shirotori,
R. Honda, K. Imai, H. Sako, S. Sato, Sugimura, et al., Few-Body Systems, in press.
Invited Talks
1) Strangeness nuclear physics at J-PARC, K. Imai, Hadron physics meeting,
Pohang, Korea (2011).
2) Hadron Physics at J-PARC, K. Imai, ECT Workshop on Strange Hadronic
Matter, Trento, Italy (2011).

3) Search for H-dibaryon at J-PARC, S. Sato, ECT Workshop on Strange Hadronic
Matter, Trento, Italy (2011).
4) Experimental investigation of baryon-baryon interaction through Sigma-p
scattering at J-PARC, R. Honda, 8th Postgraduate Academic Forum of Beihang
University, Beijing, China (2011).
5) Search for θ via the pion induced reaction at J-PARC: J-PARC E19, K.Shirotori,
The Fifth Asia-Pacific Conference on Few-Body Problems in Physics 2011
(APBF2011), Seoul, Korea (2011).
6) Search for θ pentaquark baryon at the J-PARC K1.8 beam line: First result andcurrent status, K. Shirotori, Hadron Physics Meeting (Strangeness Physics at
J-PARC), Pohang, Korea (2011)
7) Status of E03 and E07, K. Tanida, Korea-Japan workshop on nuclear andhadron physics at J-PARC, Seoul, Korea (2011).
8) What is the charmed analog of Lambda(1405)?, K. Tanida, The fifth Asia-PacificConference on Few-Body Problems in Physics 2011 (APFB2011), Seoul, Korea (2011).
9) Three-dimensional calculation of inhomogeneous structure in low-density
nuclear matter, M. Okamoto, XVth Research Workshop on Nucleation Theory
and Applications, Dubna, Russia (2011).
10) Overview of spin physics results from PHENIX experiment, K. Tanida for the
PHENIX collaboration, The 4th International Workshop of High Energy Physics
in the LHC Era, Valparaiso, Chile (2012).

Research Group for Bioactinide
Publication List

Papers1) Accumulation of Co in yeast cells under metabolically active condition-implication for role of yeast in migration of radioactive Co-, N. Kozai, T.
Ohnuki, F. Sakamoto, Y. Suzuki, K. Tanaka, H. Iefuji, and T. Sakai, J. Nucl. Sci.
Technol., 48, 1206-1213 (2011).
2) Behavior of paramecium sp. in solutions containing Sr and Pb: Do paramecium
sp. alter chemical forms of those met, N. Kozai, T. Ohnuki, M. Koka, T. Sato,and T. Kamiya, Nucl. Instr. Meth. Phys. Res. B 269, 2393-2398 (2011).
3) Speciﬁc sorption behavior of actinoids on biogenic Mn oxide, K. Tanaka, Y.
Tani, and T. Ohnuki, Chem. Lett. 40, 806-807 (2011).
4) Interactions of the rare earth elements - desferrioxamine B complexes with

Pseudomonas fluorescens and g-Al2O3, T. Ohnuki and T. Yoshida, Chem. Lett.
41, 98-100 (2011).
5) Local area distribution of fallout radionuclides from Fukushima Daiichi Nuclear
Power Plant by autoradiography analysis, F. Sakamoto, T. Ohnuki, N. Kozai,
S. Igarashi, S. Yamasaki, Z. Yoshida, and S. Tanaka, Trans. Atomic Energy Soc.
Japan 11, 1-7 (2012) (in Japanese) .
Invited Talks
1) Biotransformation of rare earth elements, T. Ohnuki, Goldschmidt Conference
2011, Prague, Czech Republic (2011).

Research Group for Radiation and Biomolecular Science
Papers1) Pulse radiolysis study on free radical scavenger edaravone (3-methyl-1-phenyl2-pyrazolin- 5-one) 2: A comparative study on edaravone derivatives, K. Hata,
M. Lin, Y. Katsumura, Y. Muroya, H. Fu, S. Yamashita, and H. Nakagawa, J.
Radiat. Res. 52, 15-23 (2011).
2) Fluorescent probe for steady-state radiolysis with heavy ions 1: LET effects and timedependence of OH yields, Y. Maeyama, S.Yamashita, G. Baldacchino, M.Taguchi, A.
Kimura, Y. Katsumura, and T. Murakami, Radiat. Phys. Chem. 80, 535-539 (2011).
3) Study on depth proﬁle of heavy ion irradiation effects in poly(tetraﬂuoroethyleneco-ethylene), T. Gowa, T. Shiotsu, T. Urakawa, T. Oka, T. Murakami, A. Oshima,
Y. Hama, and M. Washio, Radiat. Phys. Chem. 80, 264-267 (2011).
4) Ortho-positronium reactions in water studied by positron annihilation age-momentum
correlation, T. Hirade, T. Oka, and J. J. Lee, Materials Sci. Forum 666, 103-108 (2011).
5) Electron paramagnetic resonance study of unpaired electron species in thin ﬁlms
of pyrimidine bases induced by nitrogen and oxygen K-shell photoabsorption, T.
Oka, A. Yokoya, and K. Fujii, Appl. Phys. Lett. 98, 103701-1-103701-3 (2011).
6) A novel technique using DNA denaturation to detect multiply induced singlestrand breaks in a hydrated plasmid DNA molecule by X-ray and 4He2+ ion
irradiation, A. Yokoya, N. Shikazono, K. Fujii, M. Noguchi, and A. Urushibara,
Radiat. Protect. Dosim. 143, 219-225 (2011).
7) Model for analysis of the yield and the level of clustering of radiation-induced DNA
strand breaks in hydrated plasmids, N. Shikazono, A. Yokoya, A. Urushibara, M.
Noguchi, and K. Fujii, Radiat. Protect. Dosim. 143, 181-185 (2011).
8) Development of function-graded proton exchange membrane for PEFC using
heavy ion beam irradiation, F. Shiraki, T. Yoshikawa, A. Oshima, Y. Oshima, Y.
Takasawa, N. Fukutake, T. Gowa Oyama, T. Urakawa, H. Fujita, T. Takahashi,
T. Oka, H. Kudo, T. Murakami, Y. Hama, and M. Washio, Nucl. Instr. Meth.
Phys. Res. B 269, 1777-1781 (2011).
9) Induction of DNA DSB and its rejoining in clamped and non-clamped tumours after
exposure to carbon ion beams in comparison to X rays, R. Hirayama, A. Uzawa,
Y. Matsumoto, M. Noguchi, Y. Kase, N. Takase, A. Ito, S. Koike, K. Ando, R.
Okayasu, and Y. Furusawa, Radiat. Protect. Dosim. 143, 508-512 (2011).
10) Spin trapping reactions of a novel gauchetype radical trapper G-CYPMPO, T.

Oka, S. Yamashita, S. Saiki, M. Midorikawa, Y. Muroya, M. Kamibayashi, M.
Yamashita, K. Anzai, and Y. Katsumura, Anal. Chem. 83, 9600-9604 (2011).
11) The mutagenic potential of 8-oxoG/single strand break-containing clusters
depends on their relative positions, M. Noguchi, A. Urushibara, A. Yokoya, P.
O'Neill, and N. Shikazono, Mutation Res. 732, 34-42 (2012).
12) Yield of single- and double-strand breaks and nucleobase lesions in fully
hydrated plasmid DNA films irradiated with high-LET charged particles, T.
Ushigome, N. Shikazono, K. Fujii, R. Watanabe, M. Suzuki, C. Tsuruoka, H.
Tauchi, and A. Yokoya, Radiat. Res. 177, 614-627 (2012).
Books & Reviews
1) Radiation damage to DNA selectively induced by synchrotron X-rays, K. Fujii,
Radiation Effects Association 2011.4, 8-10 (2011) (in Japanese).
Invited Talks
1) Introduction to synchrotron radiation and radio-biological studies, A. Yokoya, Surface
Electro, Radiation, and Photo Chemistry International Master Course (SERP-Chem),
EU Education & Training "ERASUMUS MUNDUS", Orsay, France (2011).
2) Spectroscopic studies of genome damage induced by ionizing radiation, A.
Yokoya, Summer school of the radiation section of the Japan Society of Applied
Physics, Sendai, Japan (2011).
3) Unpaired electron species in DNA and DNA-base thin films induced by K-shell
photoabsorption, T. Oka, Photon Factory Seminar: Prospect on SynchrotronRadiobiology focusing on Inhomogeneous Energy Deposition, Tsukuba, Japan (2011).
4) Study of DNA damage using soft X-ray absorption technique, K. Fujii,
Photon Factory Seminar: Prospect on Synchrotron Radiobiology focusing on
Inhomogeneous Energy Deposition, Tsukuba, Japan (2011).
5) DNA base lesions induced by phosphorus K-ionization and its Auger decay,
A. Yokoya, Photon Factory Seminar: Prospect on Synchrotron Radiobiology
focusing on Inhomogeneous Energy Deposition, Tsukuba, Japan (2011).
6) Physicochemical processes of radiation damage to genomic DNA and its
enzymatic repair, A. Yokoya, 67th Annual meeting of the Physical Society ofJapan, Nishinomiya, Japan (2012).

Research Group for Spin-Polarized Positron Beam
Papers1) Development of pulsed positron beam with compact pulsing system, M.
Maekawa and A. Kawasuso, Nucl. Inst. Meth. Phys. Res. B 270, 23-27 (2011).
2) Positron annihilation study of 4H SiC by Ge+ implanted and subsequent
thermal annealing, Y. Runsheng, M. Maekawa, A. Kawasuso, B. Y. Wang, and
L. Wei, Nucl. Inst. Meth. Phys. Res. B 270, 47-49 (2011).
3) Microstructure of nearly stoichiometric ZrC Coating layers for advanced hightemperature gas cooled reactor fuel and positron annihilation spectroscopy ofvarious ZrC coating layers, J. Aihara, M. Maekawa, S. Ueta, A. Kawasuso, and

K. Sawa, J. Am. Ceram. Soc. 94, 4516-4522 (2011).
4) Doppler broadening of annihilation radiation measurements on 3d and 4f
ferromagnets using polarized positrons, A. Kawasuso, M. Maekawa, Y. Fukaya.
A. Yabuuchi, and I. Mochizuki, Phys. Rev. B 85, 024417-1-024417-6 (2012).
5) Increase in the beam intensity of the linac-based slow positron beam andits application at the Slow Positron Facility, KEK, K. Wada, T. Hyodo, A.
Yagishita1, M. Ikeda, S. Ohsawa, T. Shidara, K. Michishio, T. Tachibana, Y.
Nagashima, Y. Fukaya, M. Maekawa, and A. Kawasuso, Eur. Phys. J. D 66, 3740 (2012).

Researches conducted under collaborations between ASRC groups appear in each group’s publication list. Excluding the overlap, the total number of papers is 179.

25 ASRCAppendix◆ International Workshop
The 2nd ASRC International Workshop “Magnetic Materials and Nanostructures”
Date : January 10-13, 2012
Venue : Ricotti, Tokai, Japan
Organizers: T. Ziman (ILL, France), Y. J. Uemura (Columbia University, U.S.A)
URL: http://asrc.jaea.go.jp/soshiki/gr/mori-gr/workshop/mmn2011/index.html
The 3rd ASRC International Workshop “New Approach to the Exotic Phases of Actinide Compounds under Unconventional Experimental
Conditions”
Date : January 31-Feburary 3, 2012
Venue : Institut Laue Langevin, Grenoble, France
Organizers: A. Hiess (ILL, France), G. H. Lander (ILL, France), S. Kambe (JAEA)
URL: http://www.ill.eu/news-events/past-events/2012/reimei/

The 5th ASRC International Workshop “Perspectives in Nuclear Fission”
Date : March 14-16, 2012
Venue : Ricotti, Tokai, Japan
Organizers: A. Andreyev (University of West Scotland, U.K), K. Nishio (JAEA)
URL: http://asrc.jaea.go.jp/ﬁssion_workshop/index.html

Publication List

The 4th ASRC International Workshop “Transformation of Radionuclides by Microorganisms, Clays, and Plants: Implication for Migration andRemediation”
Date : March 12-13, 2012
Venue : Ibaraki Quantum Beam Research Center, Tokai, Japan
Organizers: L. Macaskie (University of Birmingham, U.K), T. Ohnuki (JAEA)
URL: http://asrc.jaea.go.jp/soshiki/gr/mysite3/bio_ws/◆ ASRC Seminar
No.

Title

436

Progress in the gamma spectroscopy of p-shell hypernuclei and theprospects for the sd-shell region

Toshio Motoba

Osaka Electro-Communication Universtiy

437

Functional analysis of nuclear non-coding RNAs in mammalian cells

Nobuyoshi Akimitsu

The University of Tokyo

438

Accident of the Fukushima Daiichi Nuclear Power Plant

Syunichi Tanaka

NPO Radiation Safety Fprum

439

Origin of spin-motive-forces

Stewart E. Barnes

University of Miami

440

Current status of Korea Isotope Accelerator

Yong Hee Chung

Hallym University

441

Iron-based n-type electron-induced ferromagnetic semiconductor

Pham Nam Hai

The Univertsity of Tokyo

Toshihiko Ohnuki

JAEA

Takumi Saito

The University of Tokyo

Noriko Tomioka

National Institute for Environmental Studies

Takeshi Matsunaga

JAEA

Kazuya Tanaka

Hiroshima University

Masayuki Niiyama

Kyoto Universtiy

442

443

7th JAEA Actinide Network workshop “Behavior of nuclear fission
products in environment”

Hadron physics at LEPS and LEPS II

SpeakerAfﬁliation

Satoshi Chiba
444

Shell structure and ﬁssion of exotic heavy nuclei

Katsuhisa Nishio

JAEA

Hiroyuki Koura
445

Extended Brueckner-Hartree-Fock theory in many body systemImportance of pion in nuclei -Hiroshi Toki

Kyoto Universtiy

446

Thermoelectric materials and its applications

Yuzuru Miyazaki

Tohoku Universtiy

447

Description of heavy-ion fusion reactions near the Coulomb barriers
based on a mean-ﬁeld approximation

Kouhei Washiyama

Universite Libre de Bruxelles

448

Magnetic properties of lightly doped antiferromagnetic YBCO

Oleg P. Sushkov

The University of New South Wales

Ryouhei Amano

Kanazawa University

Kohshin Washiyama

Kanazawa University

Ichiro Nishinaka

JAEA

Masahiko Watanabe

FUJIFILM RI Pharma CO., Ltd.

Noriko Ishioka

JAEA

Akihiko Yokoyama

Kanazawa University

449

Study for nuclear medicine using the tandem accelerator of JAEA-Tokai-Aim at the new cancer medical treatment by α-emitting radioisotopes-

ASRC 26

450 Schottky barrier distribution in a single Fe/GaAs junction

Takafumi Hirohata

The University of York451 Recent lattice QCD simulations on the H-dibaryon

Takashi Inoue

Nihon University(1) The SISAK system and on-line liquid-liquid extraction
452 (2) On-line LS alpha-detection system for continuous flow

Jon Petter Omtvedt

University of Oslo

237

Eric Colineau

Institute for Transuranium Elements

454 Overview of the surrogate reactions program at LLNL

Jason Burke

Lawrence Livermore National Laboratory

455 Experimental studies of hot and dense QCD medium at LHC-ALICE

Taku Gunji

The University of Tokyo

456 Theory of charmed deuterons

Makoto Oka

Tokyo Institute of Technology

Hiroshi Amitsuka

Hokkaido University

Michito Suzuki

JAEA

453

Np Mössbauer studies on actinide superconductors and related materials

A current review for study of hidden ordering in URu2Si2
457 Electronic state of hidden ordered phase in URu2Si2

Publication List

Non-Magnetic Kondo effect emerging from vibrating magnetic ion

Takashi Hotta

Tokyo Metropolitan University

458 Temperature can enhance coherent oscillations at a Landau-Zener transition

Timothy Ziman

Institut Laue-Langevin459 New radioactive ion beams at CERN-ISOLDE : Target and ion source developments

Thierry Stora

CERN

460 Spin excitations in cuprates and iridates probed by resonant x-ray scatteringGiniyatulla Khaliullin

Max-Planck Institut

Kentaro Fujii

JAEA

Shin-ichiro Fujii

Agency of Industrial Science and Technology

Dai Kato

Agency of Industrial Science and Technology

Mitsutoshi Tsukimoto

Tokyo University of Science

Nobuyoshi Akimitsu

The University of Tokyo

Electric-field control of the magnetic exchange interaction in quantum
462 dots and molecules

Jan Martinek

Polish Academy of Sciences

463 Spin excitation and phonon effect for spin-Peierls model

Takanori Sugimoto

Kyoto University

Laser ionization spectroscopy of exotic nuclei; Recent results from the464 ISOLDE-CERN and LISOL facilities

Piet van Duppen

University of Leuven

465 Search for neutron-rich Lambda hypernuclei at J-PARC

Atsushi Sakaguchi

Osaka University

Quantum critical behavior and field-induced superconducting phase in
466 CeCoIn investigated by the magnetocaloric effects
5

Yoshifumi Tokiwa

University of Goettingen

Theoretical research on the structural and transport characteristics of
467 several functional nanowires

Zhuo Xu

Chinese Academy of Science

468 Drawing a nuclear phase diagram by high-energy heavy-ion reactions

Takao Sakaguchi

Brookhaven National Laboratory

461 Biological assessment of radiation damage of ATP induced by soft X-rays◆ Research themes accepted for Reimei Research Program 2011
Research Theme

Project Director (Applicant)Organization

New approach to the exotic phases of actinides compounds under
unconventional experimental conditions

Arno Hiess

Institut Laue Langevin

New fission mechanism peculiar to proton-rich nuclei

Andrei Andreyev

University of the West of Scotland

Exploration of new biological specific function by heavy elements stimulus

Lynne E. Macaskie

University of Birmingham

Synthesis, magnetic and transport studies of Li(Zn,Mn)As and other doped
I-II-V magnets

Yasutomo J. Uemura

Columbia University

Theoretical studies in spintronics and multifunctional materials

Timothy Ziman

Institut Laue Langevin◆ Research Collaborations and Cooperations
The number of Research collaborations

27 ASRCThe number of organizations based on joint research arrangements

Research collaborations

37

Universities

21

Research cooperations

3

Public Institutes

7

Others7

Foreign Organizations

12

Annual Report of ASRC 2011