CONTENTS

RIKEN Accel. Prog. Rep. 50 (2017)

C O N T E N T S
PagePREFACEThe 50th Anniversary Special Issue Research Activities 1991–2016
Retrospective of my 24-year “RIBF life” ·······························································································
Y. YanoS-1

RIKEN Accelerator Research Facility (RARF) – The predecessor of Nishina Center – ·········································
M. Ishihara

S-6

RIPS Project: Pursuit of the RIB Physics Program with RIPS ·······································································
M. Ishihara

S-9

Experiments at SMART and related activities ·························································································· S-14
H. Sakai
Nuclear Chemistry Laboratory ··········································································································· S-22
F. AmbeDevelopment of atomic physics under the contribution of RIKEN Accelerator Research Facility,
during 1972–1997 period ··········································································································· S-23
Y. Awaya (Enomoto)Ion beam breeding – An efﬁcient synergic link between agricultural science and accelerator physics – ······················ S-37
T. Abe and S. Yoshida
Historical overview of the RIKEN-RAL Muon Facility from catalyzed fusion to materials/life science ······················ S-39
K. Nagamine
The RIKEN-RAL Muon Facility at the ISIS Neutron and Muon Source ··························································· S-43
P. King
Pursuit of Spin Physics Program at RHIC ······························································································ S-46
M. Ishihara
RBRC: A great success ···················································································································· S-48
N. P. Samios
Scientiﬁc pedigree of Chief Scientists of Radiation Laboratory ····································································· S-49
H. Enʼyo
Advanced Meson Science Laboratory – Hadron part – ··············································································· S-51
M. Iwasaki
Developments of linear accelerators at RI Beam Factory ············································································ S-54
O. Kamigaito
Development of ECR ion sources at RIKEN ··························································································· S-56
T. Nakagawa
Realization of recirculating He-gas stripper ···························································································· S-58
H. Imao
Introduction of storage-ring experiments at RIBF ····················································································· S-60
M. Wakasugi
Research activities of Research Instruments Group ··················································································· S-61
T. Kubo
Recent activities of the User Liaison and Industrial Cooperation ··································································· S-63
H. Sakai
Safety management at Nishina Center since 1990 ····················································································· S-66
Y. Uwamino
Superheavy element research at RIKEN Nishina Center ············································································· S-67
K. Morimoto and K. Morita
Direct reaction experiments with fast RI beams for studying properties of exotic nuclei
and astrophysical nuclear processes ······························································································· S-68
T. Motobayashi

RIKEN Accel. Prog. Rep. 50 (2017)

CONTENTSRadioactive Isotope Physics Laboratory ································································································ S-69
H. Sakurai
Spin Isospin Laboratory ··················································································································· S-70
T. Uesaka
Nuclear Spectroscopy Laboratory ······································································································· S-71
H. Ueno10 years of Theoretical Physics Laboratory ···························································································· S-73
H. Kawai
Quantum Hadron Physics Laboratory ··································································································· S-74
T. Hatsuda
Theoretical Nuclear Physics Laboratory ································································································ S-75
T. Nakatsukasa
Gaussian Expansion Method and its application to nuclear physics with strangeness ··········································· S-76
E. Hiyama
Mathematical Physics Laboratory ······································································································· S-77
K. Hashimoto
A brief history of the High-Energy Astrophysics Laboratory ········································································ S-78
T. Tamagawa
Six Years of cross-disciplinary studies at the Astro-Glaciology Research Unit:
Astronomical signatures in polar ice cores ······················································································· S-80
Y. Motizuki
Overview of activities of the NUSPEQ group in CNS ················································································ S-82
S. Shimoura
Research activities of KEK RNB group at RIBF ······················································································ S-84
H. Miyatake

Ⅰ. HIGHLIGHTS OF THE YEAR
Two-Proton Radioactivity of 67Kr ········································································································
T. Goigoux et al.

1

94 β-decay half-lives of neutron-rich nuclei from 55Cs to 67Ho ······································································
J. Wu, S. Nishimura et al.

2First Spectroscopy of 110Zr ················································································································
N. Paul et al.

3

Nucleus 26O: A barely unbound system beyond the drip line ·········································································
Y. Kondo et al.

4Interaction cross section study of the two-neutron halo nucleus 22C·································································
Y. Togano et al.

5

Spallation reaction study for the long-lived ﬁssion product 107Pd ····································································
H. Wang et al.

6

Investigation of isoscalar and isovector dipole excitations in 20O ···································································
N. Nakatsuka et al.

7

Measurement of multiple isobar chains as a ﬁrst step toward SHE identiﬁcation via mass spectrometry ·····················
P. Schury, M. Wada et al.

8First direct mass measurements of mendelevium and einsteinium with an MRTOF mass spectrograph ·······················
Y. Ito et al.

9

Nuclear spectroscopy of multi-nucleon transfer reaction products in the 136Xe and 198Pt system ································
Y. Hirayama et al.

10Electron scattering off 208Pb and 132Xe at SCRIT electron scattering facility ·······················································
K. Tsukada et al.

11First direct measurement of the 11C(α , p)14N stellar reaction by an extended thick-target method ······························
S. Hayakawa et al.

12

A directly measurable parameter quantifying the halo nature of one-neutron halo nuclei ·······································
S. Watanabe et al.

13

CONTENTS

RIKEN Accel. Prog. Rep. 50 (2017)

Simultaneous microscopic description of nuclear level density and radiative strength function ································
N. Quang Hung et al.
Disentangling transverse single spin asymmetries for forward neutrons
in high-energy polarized-proton–nucleus collisions ·············································································
G. Mitsuka

14

15

Baryon interaction in lattice QCD ·······································································································
T. Iritani for HAL QCD Coll.

16

Performance of the SπRIT Time Projection Chamber ·················································································
G. Cerizza et al.

17

Commissioning of Rare RI Ring using exotic nuclei ··················································································
D. Nagae et al.

18

Construction status of OEDO beamline ·································································································
S. Michimasa et al.

19

Gamma-ray inspection of a rotating object ·····························································································
T. Kambara and A. Yoshida

20

Effects of 2.6 GeV uranium irradiation on FeSe ·······················································································
Y. Sun et al.

21

Stable transmission of slow highly charged ions through tapered glass capillary with active discharging method
for sub-micron sized beams·········································································································
T. Ikeda et al.

22

Investigation of magnetic ordered states in the pyrochlore iridates (Nd,Ca)2Ir2O7 probed by μ SR ·····························
R. Asih et al.

23

Studies of the muon transfer process in a mixture of hydrogen and higher Z gas ·················································
A. Vacchi et al.

24

Gas-phase chemistry of Re carbonyl complexes with short-lived isotopes ························································
Y. Wang et al.

25

Observation of the chemical reaction equilibria of element 104, rutherfordium:
Solid-liquid extraction of Rf, Zr, Hf and Th with Aliquat 336 resin from HCl ·············································
T. Yokokita et al.

26

Optimization of mutation induction by heavy-ion beam irradiation in rice with seed water content change ·················
Y. Hayashi et al.

27

Change in rice gene expression proﬁle dependent on linear energy transfer after heavy-ion beam irradiation ···············
K. Ishii et al.

28

Ⅱ. RESEARCH ACTIVITIES I (Nuclear, Particle and Astro-Physics)

1. Nuclear Physics
158,160
Nd ······················································································································
μ s isomers of
E. Ideguchi

29

Long-lived K isomer and enhanced γ vibration in 172Dy ··············································································
H. Watanabe

30

K-isomer properties of the doubly mid-shell nuclide 170Dy ··········································································
P.-A. Soderstrom et al.

31

Shape coexistence along N = 40 studied with isomer and beta decay ······························································
F. Recchia

32

Beta-delayed proton spectrum from the Tz = −2 nucleus 64Se at BigRIPS ··························································
P. Aguilera et al.

33

Study of the beta decay of 70Br ···········································································································
A. I. Morales et al.

34

Study of β-delayed proton emitters in the region from Zn to Kr ····································································
T. Goigoux et al.

35

Mass and β-decay measurement of neutron-rich nuclei around N=56 ······························································
A. Estrade et al.

36

β and β-n decay of 131−135In·················································································································
G. S. Simpson

37

RIKEN Accel. Prog. Rep. 50 (2017)

β -decay γ -ray spectroscopy of
B. Moon et al.

CONTENTS140

Te : level structure of 140I beyond N = 82 ························································

β decay of Sb : level scheme of
B. Moon et al.
140

140

38

Te ·································································································

39

β -delayed γ -ray spectroscopy of Dy ··································································································
G. X. Zhang and H. Watanabe

40

Measurement of →p –6He elastic scattering at 200 A MeV ··············································································
S. Sakaguchi et al.

41

Present status of data analysis of →p − 6He elastic scattering ··········································································
S. Chebotaryov et al.

42

Study of neutron-neutron correlation in Borromean nuclei via the (p, pn) reaction with the SAMURAI spectrometer ·····
Y. Kubota et al.

43

Exploring the N=16 sub-shell closure: level structure of 22C and search for 21B ··················································
N. Orr for the SAMURAI36 R3B-NeuLAND collaboration

44

Measurement of the neutron-decay lifetime of the 26O ground state at the SAMURAI setup at RIBF ·························
C. Caesar et al.

45

Search for unbound excited states of deformed halo nucleus 31Ne using breakup reactions ·····································
T. Tomai et al.

46

Progress report of Gamow–Teller giant resonance studies at RIBF ·································································
M. Sasano et al.

47(γ ,n) and (γ ,2n) cross sections in Coulomb breakup reactions of 79Se,80Se at 200 MeV/nucleon ································
A. Hirayama et al.

48

Measurement of Pion Multiplicities in Asymmetric Sn Reactions Using the SπRIT Time Projection Chamber ·············
J. Barney et al.

49

Search for PYGMY states in 70Ni ········································································································
O. Wieland et al.

50

Structure of Borromean nuclei around N=16 and 20 shells ··········································································
R. Kanungo

51

Study of the pygmy dipole resonance of 132Sn and 128Sn in inelastic α -scattering ·················································
J. Tscheuschner and T. Aumann

52Intermediate-energy Coulomb excitation of 136Te ·····················································································
V. Vaquero et al.

53

Measurement of proton elastic scattering from 132Sn in inverse kinematics ························································
J. Zenihiro et al.

54

Measurement of isoscalar giant monopole resonance in 132Sn using CNS active target ··········································
S. Ota et al.

55

Measurement of 4He(8He,8Be) reaction for verifying tetra-neutron resonance ····················································
S. Masuoka

56

Parity-transfer (16O,16F(0−)) reaction to study spin-dipole 0− states ··································································
M. Dozono et al.

57

Neutron shell structure of 23,25F and oxygen neutron dripline anomaly ·····························································
T .L. Tang et al.

58

Mass measurements of neutron-rich isotopes in the vicinity of 54Ca using the TOF–Bρ technique ·····························
M. Kobayashi et al.

59

Competition between shape and shell in 75Cu clariﬁed by the novel magnetic moment measurement ·························
Y. Ichikawa et al.

60

Determination of neutron skin thickness via measurements of σ I and σ CC of Ni isotopes ········································
M. Takechi et al.

61

Deuteron analyzing powers for d-p elastic scattering at 186.6 MeV/nucleon ······················································
K. Sekiguchi et al.

62

Commissioning the BRIKEN array in parasitic mode using exotic Ni-Ga secondary beam ·····································
G. G. Kiss et al.

63

168

CONTENTS

RIKEN Accel. Prog. Rep. 50 (2017)

Search for β -delayed two and three-neutron emitters in the vicinity of N=28 using the BRIKEN array ······················
V. H. Phong et al.

64

Initial effort to resolve isomers in MRTOF-MS via in-trap decay ···································································
P. Schury, M. Wada et al.

65

Direct high-precision mass measurements of octupole-deformed nuclei with an MRTOF mass spectrograph ···············
Y. Ito et al.

66

Precision mass measurements of proton-rich nuclei in A ∼ 60−80 region
with the multireﬂection time-of-ﬂight mass spectrograph ······································································
S. Kimura et al.

67

Study of barrier distribution in the reaction 48Ca,50Ti+208Pb and 48Ca+248Cm at RIKEN-GARIS ································
T. Tanaka et al.

68

Measurement of barrier distribution for 50Ti,51V+248Cm, and 51V+208Pb reactions ·················································
T. Niwase et al.

69

Yield development of KEK isotope separation system ················································································Y. X. Watanabe et al.

70

Proton-proton correlations in distinguishing the two-proton emission mechanism of 23Al and 22Mg ···························
D. Q. Fang, Y. G. Ma et al.

71

Magnetic moment of the 13/2+ isomeric state in 69Cu: Spin alignment in a single-nucleon removal reaction ·················
A. Kusoglu, G. Georgiev et al.

72

Search for low-lying resonances in 10N structure with proton resonant scattering ·················································
E. Milman et al.

73

21
β -NMR measurements of O ·············································································································
A. Gladkov et al.

74

New measurement of the 34Si(p, p) reaction ····························································································
N. Kitamura et al.

75

Study on the β decay of 39S ···············································································································
L. C. Tao et al.

76

Production of a 7Be implanted target ····································································································
A. Inoue et al.

77

Experimental investigation of a linear-chain structure in 14C ········································································
H. Yamaguchi et al.

78

Be(n, p)7Li and 7Be(n, α )4He reaction measurements at CRIB using the Trojan Horse method ·······························
S. Hayakawa et al.

79

Study of α -cluster structure in 22Mg ·····································································································K. Y. Chae

80

26m

Al beam production with CRIB ·······································································································
D. Kahl and H. Yamaguchi

81

Shape coexistence in the N =19 neutron-rich nucleus 31Mg explored by β -γ spectroscopy of spin-polarized 31Na ···········
H. Nishibata et al.

82

RI beam production at BigRIPS in 2016 ································································································
H. Takeda et al.

83

Production cross section measurements of Ne isotopes with a 48Ca beam ·························································
D. S. Ahn et al.

85

Production cross sections of neutron-rich nuclei in the region around Z = 33 using the in-ﬂight ﬁssionof a 238U beam at the 345 MeV/nucleon ···························································································
Y. Shimizu et al.

86

Production cross-section measurement for radioactive isotopes produced from 124Xe beam at 345 MeV/nucleon
by BigRIPS separator ···············································································································
H. Suzuki et al.

87

7

2. Nuclear Physics (Theory)
Sum rule study for Double Gamow-Teller state ·······················································································
H. Sagawa and T. Uesaka

89

RIKEN Accel. Prog. Rep. 50 (2017)

CONTENTS

Effect of isoscalar spin-triplet pairings on spin-isospin responses ··································································
H. Sagawa et al.

90

Decay dynamics of the unbound 25O and 26O nuclei ···················································································
K. Hagino and H. Sagawa

91

QRPA calculations with Skyrme energy density functional for rotating unstable nuclei ·········································
M. Yamagami and K. Matsuyanagi

92

Improved treatment of blocking effect at ﬁnite temperature ·········································································
N. Quang Hung et al.

93

Effective restoration of dipole sum rules within the renormalized random-phase approximation ······························
N. Quang Hung et al.

94

Giant dipole resonance in hot rotating nuclei ··························································································
D. R. Chakrabarty et al.

95

Enhanced collectivity of γ vibration in the neutron-rich Dy isotopes around N = 108 ···········································
K. Yoshida and H. Watanabe

96

Three-body model for IS spin-triplet neutron-proton pair in 102Sb ··································································Y. Tanimura and H. Sagawa

97

Quasi-particle random phase approximation (QRPA) with quasi-particle-vibration coupling (QPVC):
application to the Gamow-Teller response of a superﬂuid nucleus 120Sn ·····················································
Y. F. Niu et al.

98

Shell-model evaluation of beta-decay half-lives for N = 50 neutron deﬁcient nuclei ············································
M. Honma et al.

99

Application of top-on-top model to 11/2− band in 135Pr ···············································································
Sugawara-Tanabe and K. Tanabe

100

Fully self-consistent study of charge-exchange resonances and their impact on the symmetry energy parameters ··········
X. Roca-Maza et al.

101

Liquid-Gas Phase Transitions in Quantum Field Theories ···········································································
H. Nishimura et al.

102

Joint project for large-scale nuclear structure calculations in 2016 ·································································
N. Shimizu et al.

103

3. Nuclear Data
Thick-target transmission method for excitation functions of interaction cross sections ·········································
M. Aikawa, S. Ebata and S. Imai

105

Report on EXFOR Compilation 2016 from the RIBF ·················································································
D. Ichinkhorloo et al.

106

4. Hadron Physics–

Charged background study for AN of forward neutron production in √ s =200 GeV polarized proton-proton collisions
in PHENIX experiment ·············································································································
M. Kim et al.

107

Spin Physics in RHICf Experiment ······································································································J. S. Park108

DAQ system in RHICf experiment ······································································································
H. Menjo et al.

109

Measurement of double-helicity asymmetries in inclusive J/ψ production in longitudinally polarized p + p collisions–at √ s = 510 GeV ·····················································································································
Y. Goto110

Status of double helicity asymmetries (ALL) in π± production at mid-rapidity in longitudinally polarized p + p collisions
with PHENIX experiment ··········································································································
T. Moon for the PHENIX Collabor

111–

Single transverse spin asymmetry (AN) via charged pion production in polarized p + Au collisions at √ s = 200 GeV ·····J. H. Yoo for the PHENIX collab

112

Nuclear modiﬁcation factors of semi-leptonic charm and bottom decay electrons in central Au+Au collisions—at √ sNN = 200 GeV ···················································································································
K. Nagashima et al.

113

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RIKEN Accel. Prog. Rep. 50 (2017)

Measurements of J/ψ mesons from B meson decays with the PHENIX-VTX detector ··········································
T. Hachiya (PHENIX)

114

Improvement in the track reconstruction efﬁciency with VTX in the PHENIX experiment ·····································
Y. Ueda et al.

115

Development of a prototype silicon tracking detector for the sPHENIX experiment ·············································
Y. Yamaguchi et al.

116

Fragmentation function measurements in Belle ·······················································································
R.Seidl et al.

117

Measurement of anti-quark ﬂavor asymmetry in the proton at SeaQuest ··························································
K. Nakano et al.

118

Search for K̄NN bound state at J-PARC ·································································································
F. Sakuma et al.

119

Energy calibration using the p(d, 3He)π 0 reaction in pionic atom spectroscopy at BigRIPS ·····································
T. Nishi et al.

120

Clear indication of a strong I =0 K̄N attraction in the Λ(1405) region from the CLAS photo-production data ················
M. Hassanvand et al.

121

5. Hadron Physics (Theory)
Transport coefﬁcients of quark-gluon plasma in strong magnetic ﬁeld ·····························································
H. -U. Yee

123

Renormalization in the quasi parton distribution functions ···········································································
T. Ishikawa

124

Coulomb sum rule in a covariant effective quark theory ·············································································
I. Cloët, W. Bentz and A. W. Thomas

125

Canonical approach to ﬁnite density QCD with multiple precision computation ·················································
R. Fukuda et al.

126

Chiral magnetic superconductivity ······································································································
D. E. Kharzeev

127

Volume dependence of baryon number cumulants and their ratios ··································································
V. Skokov

128

ΛN and ∑ N interactions from 2 + 1 lattice QCD with almost physical masses ····················································
H. Nemura

129

Nucleon form factors with large momenta from lattice QCD ········································································
S. Syritsyn and B. Musch

130

Octet Baryon Magnetic Moments from an SU(3) Flavor-Symmetric Lattice QCD Calculation ·································
B. Tiburzi

131Λb → Λ+− form factors, differential branching fraction, and angular observables from lattice QCD
with relativistic b quarks ············································································································
W. Detmold and S. Meinel132

Λc → Λ+ν form factors and decay rates from lattice QCD with physical quark masses ········································
S. Meinel

133

6. Particle Physics
Light scalar resonance from lattice simulation of SU(3) gauge theory with eight light fermions ·······························
E. T. Neil

135

Using Λb → Λμ+μ− data within a Bayesian analysis of |ΔB| = |ΔS| = 1 decays ·····················································
S. Meinel and D. van Dyk

136

Determination of |Vus| from inclusive τ decay with lattice HVPs ····································································
T. Izubuchi and H. Ohki137

New insights on dark matter using lattice gauge theories ············································································
E. Rinaldi

138

Parity-doublet representation of Majorana fermions and neutron oscillation ······················································
K. Fujikawa and A. Tureanu

139

Separability criteria with angular and Hilbert-space averages ·······································································
K. Fujikawa et al.

140

RIKEN Accel. Prog. Rep. 50 (2017)

CONTENTS

7. Astrophysics and Astro-Glaciology
High-density kaonic-proton matter (KPM) composed of Λ∗ ≡ K−p multiplets and its astrophysical connections ·············
Y. Akaishi and T. Yamazaki

141Time-reversal measurement of the p-wave cross sections of the 7Be(n, α )4He reaction for the cosmological Li problem ····
T. Kawabata et al.

142

Box-model simulation for inﬂuence of solar proton events on the middle atmosphere ··········································
Y. Nakai et al.

143

Characteristics of Na+ and Cl− distributions in shallow samples from an Antarctic ice core DF01 (Dome Fuji) drilledin 2001: Result of strong atmospheric high-pressure blocking events? ······················································
Y. Motizuki et al.

144

8. Accelerator
Beam test using new central region for energy upgrade at RIKEN AVF cyclotron ···············································
J. Ohnishi et al.

145

Injection-beam-orbit analysis of AVF cyclotron using 4-dimensional emittance ··················································
Y. Kotaka et al.

146

Mg ion pumping effect during 24Mg8+ ion beam production at the Hyper-ECR ion source ······································
H. Muto et al.

147

Recent developments of RIKEN 28 GHz SC-ECRIS ·················································································
Y. Higurashi et al.

148

Four-dimensional transverse phase space distribution changes with respect to degree of vacuum of LEBT ··················
T. Nagatomo et al.

149

Beam energy measurement system using electrostatic pickups at the RIBF ·······················································
T. Watanabe et al.

150

Sensitivity improvement and miniaturization of HTc-SQUID beam current monitor ············································
T. Watanabe et al.

151

Radiation monitoring for cyclotrons in RIBF ··························································································
M. Nakamura et al.

152

Development of thin graphite carbon (GC) disks ······················································································
H. Hasebe et al.

153

Status of cryopumps in RIBF accelerator facilities (2016) ···········································································
Y. Watanabe et al.

154

Operation report 2016 for Nishina and RIBF water-cooling systems ·······························································
T. Maie et al.

155

Integration of standalone control system into EPICS-based system at RIKEN RIBF·············································
A. Uchiyama et al.

156

Introduction of visualization system for RIBF control network monitoring ·······················································
A. Uchiyama et al.

157

Improvements of the RIBF control system ·····························································································
M. Komiyama et al.

158

Long term operation of low charge state laser ion source ············································································
M. Okamura et al.

159

RFQ and IH linac for SLOWRI post accelerator ······················································································
S. Arai and M. Wada

160

Simultaneous acceleration of ions with different charge-to-mass ratio in the SLOWRI post accelerator ······················
S. Arai and M. Wada

161

9. Instrumentation
Development of beam trigger detector with compact geometry ·····································································
N. Chiga et al.

163

Development of new ionization chamber for low energy heavy ions ·······························································
N. Chiga et al.

164

Development of energy-control method for slowed-down 93Zr beam ·······························································
T. Sumikama et al.

165

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RIKEN Accel. Prog. Rep. 50 (2017)

Slowed-down RI beams of 93Zr and 107Pd at 50 MeV/u produced for spallation reaction ········································
T. Sumikama et al.

166

Operation of GET system as main readout device for SπRIT experiment at 2016 spring campaign ···························
T. Isobe et al.

167

Vertex Correlation Between Beam Line Detector and SπRIT-TPC ·································································
M. Kurata-Nishimura et al.

168

A Gating Grid Driver for Time Projection Chambers ·················································································S. Tangwancharoen et al.

169

The Veto Collimator for the SπRIT-TPC ································································································
Y. Zhang et al.

170

Zero suppression performance evaluation of GET electronics using SπRIT TPC experimental data ···························
G. Jhang

171

Kyoto Multiplicity Array for the SπRIT experiment···················································································
M. Kaneko et al.

172

KATANA - a charge-sensitive triggering system for the SπRIT experiment ·······················································
P. Lasko et al.

173

Trigger logic for the SπRIT experiments ································································································
C. Santamaria et al.

174

Calibration of the SπRIT TPC with light fragments ···················································································
J. Estee et al.

175

NeuLAND demonstrator performance in EOS experiments ·········································································
I. Gašparić et al.

176

Upgrade of proton detector NINJA ······································································································
N. Chiga et al.

177

Measurement of light charged particle in the SAMURAI magnet gap with NINJA ··············································T. Y. Saito, N. Chiga et al.

178

Background estimation for multi-charged particle coincidence events with SAMURAI ········································
S. Koyama et al.

179

Helium ﬁlling method for SAMURAI spectrometer ··················································································
V. Panin et al.

180

Improvement of the β -ion correlation algorithm in decay spectroscopy ···························································
J. Ha, T. Sumikama and S. Choi

181

Development of new analysis methods for EURICA data: γ -ray efﬁciency and γ -γ angular correlation ·······················
A. Yagi et al.

182

Isochronism of Rare RI Ring ·············································································································
Y. Yamaguchi et al.

183

Momentum acceptance of the Rare RI Ring studied from revolution frequency measurements ································
F. Suzaki et al.

184

Development of a monitor for stored particles in the Rare RI Ring ································································
S. Omika et al.

185

Particle selection using RF signal for Rare RI Ring experiments ···································································
Y. Abe et al.

186

Simulation and design of a large area position sensitive TOF MCP detector at the Rare RI Ring ······························
Z. Ge and S. Naimi et al.

187

Understanding bremsstrahlung spatial distribution of electron scaterring in the SCRIT experiment ··························
T. Fujita et al.

188

Properties of ion trapping measured by the SCRIT LMon ···········································································
A. Enokizono et al.

189

Upgrade of electron gun at the SCRIT facility ·························································································
M. Watanabe et al.

190

Development of an ion beam Buncher for SCRIT experiment ······································································
K. Yamada et al.

191

RIKEN Accel. Prog. Rep. 50 (2017)

CONTENTS

Ion stacking and pulse extraction at ERIS ······························································································
T. Ohnishi et al.

192

Design work of rf ion guide system at the SLOWRI facility ········································································
A. Takamine et al.

193

First cooling test of rf ion guide gas cell at the SLOWRI facility ···································································
A. Takamine et al.

194

Status of SLOWRI beamline construction ······························································································T. M. Kojima et al.

195

Introduction of silver atoms into superﬂuid helium using laser ablation method ·················································
T. Fujita et al.

196

Fluorescence detection and double resonance spectroscopy using 85Rb beam for the development of OROCHI ············
K. Imamura et al.

197

Effective suppression of stray laser light for ﬂuorescence detection from 85Rb atoms injected into superﬂuid helium ······
W. Kobayashi et al.

198

Experimental evaluation of laser-MW double resonance signal intensity in OROCHI project ·································
T. Egami et al.

199

70-m laser beam transport for the RIBF-PALIS experiment ·········································································
T. Sonoda et al.

200

Gas circulation and puriﬁcation system for RIBF-PALIS experiment ······························································
T. Sonoda and T. Tsubota

201

Concept design for cold highly charged ion generation toward time variation detection of ﬁne structure constant α ·······
N. Kimura et al.

202

Reduction in contaminants originating from primary beam by using beam stoppers in GARIS-II ·····························
S. Kimura et al.

203

Separated ﬂow operation of the SHARAQ spectrometer for in-ﬂight proton-decay experiments ······························
M. Dozono et al.

204

Development of multiwire drift chambers and the readout system for focal-plane tracking detectors in BigRIPS ··········S. Y. Matsumoto et al.

205

Development of control system for magnetic ﬁeld of the BigRIPS separator with a feedback algorithm ·····················
Y. Shimizu

206

Fast beam interlock system at BigRIPS separator ·····················································································
K. Yoshida et al.

207

Isomer identiﬁcation under high-rate-counting environment ········································································
S. Terashima et al.

208

Channeling effect in ultra-thin monolithic silicon telescopes ········································································
F. Parnefjord Gustafsson et al.

209

Pulse height defect in the sc CVD diamond detector versus the applied electric ﬁeld measured with ﬁssion fragmentsfrom 252Cf ·····························································································································
O. Beliuskina et al.
PANDORA project - low-energy neutron detector with real-time neutron-gamma discrimination ·····························
L. Stuhl et al.
Development of co-existing 129Xe and 131Xe nuclear spin masers with active feedback scheme
for the Xe atomic EDM search ····································································································
T. Sato et al.

210
211

212

Towards two-neutron transfer reactions with a tritium target: Characterization of a prototype TiD0.24 target··················
T. Koiwai, et al.

213

Isotope identiﬁcation in nuclear emulsion plate for double-hypernuclear study (isotope track-angle dependence) ··········
R. Murai et al.

214

Measurement of the activation of helium gas stripper by 238U beam irradiation at 11 A MeV ···································
A. Akashio et al.

215

Radiation evaluation for RILAC irradiation room ·····················································································
K. Tanaka et al.

216

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RIKEN Accel. Prog. Rep. 50 (2017)

Status report on the developement of the high-resolution missing-mass spectroscopy for the (p,2p) reaction
in inverse kinematics ················································································································
S. Reichert, M. Sako et al.

217

Preparation status of the J-PARC E16 experiment in 2016 ···········································································
S. Yokkaichi et al.

218

Hadron blind detector using a ﬁnely segmented pad readout ········································································
K. Kanno et al.

219

Expected energy resolution and its trigger dependence for very forward neutron measurements–in √ s = 510 GeV polarized proton-proton collisions at the RHICf experiment ·············································M. H. KIM

220

Sensor module prototype for Silicon INTT for sPHENIX ············································································
Y. Akiba et al.

221

Intermediate Silicon Strip Tracker for sPHENIX Experiment ·······································································
I. Nakagawa et al.

222

Development of data-collection and data-analysis systems for time-resolved ESR experiments ·······························T. L. Tang et al.

223

Parallel Readout VME DAQ system ·····································································································
H. Baba et al.

224

CCJ operations in 2016 ····················································································································
S. Yokkaichi et al.

225

Computing and network environment at the RIKEN Nishina Center ·······························································
T. Ichihara et al.

226

Ⅲ. RESEARCH ACTIVITIES II (Material Science and Biology)

1. Atomic and Solid State Physics (Ion)
Site occupancy of hydrogen in Ta-rich Ta-Nb alloys as observed by the channelling method ··································Y. Okada et al.

227

Nb/rare-earth bilayers: RKKY systems in proximity to an s-wave superconductor ··············································
H. Yamazaki

228

Investigation of non-catastrophic failure mode observed in SiC diodes ····························································
Y. Nakada et al.

229

Behavior of Cu impurity in Si studied by the β-NMR of 58Cu ·······································································
M. Mihara et al.

230

2. Atomic and Solid State Physics (Muon)
μSR study of impurity effects on the Cu-spin correlation and superconductivity
in the undoped superconductor T’-La1.8Eu0.2CuO4 ···············································································
T. Kawamata et al.

231

μSR study of ferromagnetic ﬂuctuations in heavily overdoped Bi-2201 cuprates ················································
K. Kurashima et al.

232

μSR studies of the barium iridate Ba3M Ir2O9 (M = Y, Sc) ············································································
H. Guo et al.

233

μSR investigation of a quantum criticality in the coupled spin ladder Ba2CuTeO6 ···············································Y. S. Choi, S.-H. Do et al.

234

Study of the spin dynamics of a honeycomb ruthenate using spin polarized muons ··············································
S. Yoon et al.

235

Successive magnetic phase transition of the new frustrated compound KCu3OCl(SO4)2 ········································
H. Kikuchi et al.

236

Investigation of the magnetic ground state in a new one-dimensional quantum spin system K2Cu3O(SO4)3 ··················
M. Fujihala et al.

237

Investigation on spin dynamics of a staircase kagome material by using spin polarized muons ································
S. Yoon et al.

238

Magnetic ordering and spin dynamics driven by p-orbital in RbO2 ·································································
F. Astuti et al.

239

RIKEN Accel. Prog. Rep. 50 (2017)

CONTENTS

Study of muon spin rotation of the superconducting state of organic superconductor λ-(BETS)2GaCl4 ·······················
D. P. Sari et al.

240

Na diffusion in NaxFeO2 ···················································································································
J. Sugiyama et al.

241

Solute-vacancy clustering in Al-Mg-Si and Al-Si alloys ··············································································
K. Nishimura et al.

242

Beamline tune for muonium emission from silica aerogel towards ultra-slow muon project at RIKEN-RAL ················
S. Okada et al.

243

Background study with negative muons in RIKEN-RAL for the laser spectroscopy of hyperﬁne splitting energy
in muonic hydrogen ··················································································································
M. Sato et al.

244

3. Radiochemistry and Nuclear Chemistry
Observation of the extraction of Fr2+ from a cryogenic gas cell ·····································································
P. Schury, M. Wada et al.

245

On-line column chromatography of 88Nb with 52 wt% Aliquat 336 resin from HF media for Db experiment ···············
D. Sato et al.

246

On-line solvent extraction of Re with a rapid solvent extraction apparatus coupled to the GARIS gas-jet system ···········
Y. Komori et al.

247

Extraction behavior of 93mMo and 179W from HF / HCl into Aliquat336 as model experiments for seaborgium (Sg) ········
A. Mitsukai et al

248

Batch solid-liquid extraction of Nb and Ta with 52 wt% Aliquat 336 resin from HF solutions ·································
D. Sato et al.

249

Extraction behaviors of Nb and Ta with triisooctyl amine from hydrochloric acid solution ·····································
R. Motoyama et al.

250

Chelate extraction of zirconium and hafnium using ﬂow injection analysis technique for aqueous chemistryof element 104, rutherfordium ·····································································································
R. Yamada et al.

251

Coprecipitation experiment with Sm hydroxide using a multitracer produced by nuclear spallation reaction:
A tool for chemical studies with superheavy elements··········································································
Y. Kasamatsu et al.

252

Fundamental study on DFO complexation of Zr : Application to the behavior of geochemical pairs
in aquatic environment ··············································································································
J. Inagaki et al.

253

Production and puriﬁcation of 88Zr and 121mTe ··························································································
T. Kubota et al.

254

99

Ru Mössbauer spectroscopy of Na-ion batteries of Na2RuO3 (III) ································································
K. Takahashi et al.

255

Excitation functions of natCu(α, x)57,58g+mCo nuclear reactions ·······································································
A. R. Usman et al

256

Activation cross sections of α -induced reactions on natZn for 68Ge production ····················································
M. Aikawa et al.

257

Activation cross sections of deuteron-induced reactions on natural palladium for 103Ag production ···························
N. Ukon et al.

258

Production cross sections of 169Yb in deuteron-induced reactions on 169Tm ·······················································
M. Saito et al.

259

No-carrier-added puriﬁcation of 28Mg using co-precipitation and cation exchange method ·····································
H. Kikunaga et al.

260

Speciﬁcation of 67Cu produced in the 70Zn(d,α n)67Cu reaction ·······································································
S. Yano et al.

261

Development of a production technology of 211At at the RIKEN AVF cyclotron:(i) Production of 211At from the 209Bi(α ,2n)211At reaction ·······································································
N. Sato et al.

262

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RIKEN Accel. Prog. Rep. 50 (2017)

Development of a production technology of 211At at the RIKEN AVF cyclotron:(ii) Puriﬁcation of 211At by a dry distillation method ············································································
S. Yano et al.

263

4. Radiation Chemistry and Biology
Focus formation of Rad51 and phosphorylated DNA-PK after heavy-ion irradiation in mammalian cells. ···················
M. Izumi and T. Abe

265

Low-dose high-LET heavy ion-induced bystander signaling (III) ··································································
M. Tomita et al.

266

Results of whole-genome analysis of pink and ebony mutant ········································································
K. Tsuneizumi et al.

267

Effect of carbon-ion irradiation on the mycelial growth of Tricholoma matsutake in the form of spawn ······················
H. Murata et al.

268

Flotation of Botryococcus braunii after ionizing irradiation··········································································
Y. Kazama et al.

269

Effects of LET-dose (Gy) combination on germination and viability rates in durum wheat irradiated by heavy-ion beam ···K. Murai, Y. Kazama and T. Abe

270

Whole genome sequencing of 12 morphological rice mutants from carbon-ion irradiations ····································
H. Ichida et al.

271

Analysis of a temperature sensitive virescent mutant of rice induced by heavy-ion beam ·······································
R. Morita et al.

272

Low polyphenol oxidase mutant induced by 12C6+ ion beam irradiation to protoplasts of lettuce (Lactuca sativa L.) ·······
R. Sawada et al.

273

Production of ﬂower color mutants of spray-mum ʻSouthern Chelseaʼ by Ar-ion beam irradiation ····························
M. Tamari et al.

274

New cherry blossom cultivars induced by C-ion beam irradiation ··································································
S. Ishii et al.

275

Current status of development of ion microbeam device to fatally damage the small active organs of insects ···············
T. Ikeda et al.

276

Ⅳ. OPERATION RECORDS
Program Advisory Committee meetings for nuclear physics and for materials and life experiments ··························
K. Yoneda et al.

277

Beam-time statistics of RIBF experiments ·····························································································
K. Yoneda et al.

278

Electric power condition of Wako campus in 2016 ···················································································
E. Ikezawa et al.

279

Operation report on the ring cyclotrons in the RIBF accelerator complex ·························································
K. Yadomi et al.

280

RILAC operation ···························································································································
E. Ikezawa et al.

281

AVF operations in 2016 ···················································································································
S. Ishikawa et al.

282

Present status of the liquid-helium supply and recovery system ····································································
T. Dantsuka et al.

283

Operation of the BigRIPS cryogenic plant ·····························································································
K. Kusaka et al.

284

Present status of the BigRIPS cryogenic plant ·························································································
K. Kusaka et al.

285

Radiation safety management at RIBF ··································································································
K. Tanaka et al.

286

Maintenance of vacuum equipment for accelerators ··················································································
S. Watanabe et al.

288

RIKEN Accel. Prog. Rep. 50 (2017)

CONTENTS

Operation of fee-based activities by the industrial cooperation team ·······························································
A. Yoshida et al.

289

Operation of the Pelletron tandem accelerator ·························································································
T. Ikeda et al.

290

Ⅴ. EVENTS
User’s Meeting to commemorate 25-years of the RIKEN-RAL Muon Facility project in the UK ·····························
I. Watanabe, K. Ishida and M. Iwasaki

291

The 14th International Symposium on Nuclei in the Cosmos ·········································································
S. Nishimura and T. Kajino

292International Symposium on Modern Technique and its Outlook in Heavy Ion Science (MOTO16) ··························
H. Sakurai, on behalf of MOTO16 organizers

293

The 14th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU2016) ···········
S. Yokkaichi

294

Nishina School 2016 ·······················································································································
T. Motobayashi and H. Ueno

295

RIBF Users Meeting 2016 ················································································································
T. Isobe et al.

296

Ⅵ. ORGANIZATION AND ACTIVITIES OF RIKEN NISHINA CENTER(Activities, Members, Publications & Presentations)
1. Organization ······························································································································

297

2. Finances ···································································································································

298

3. Stafﬁng ····································································································································

299

4. Research publication ····················································································································

299

5. Management ·····························································································································

300

6. International Collaboration ············································································································

305

7. Awards ····································································································································

307

8. Brief overview of the RI Beam Factory ······························································································

308

Theoretical Research Division
Quantum Hadron Physics Laboratory ·····························································································

310

Strangeness Nuclear Physics Laboratory ·························································································

319

Sub Nuclear System Research Division
Radiation Laboratory ················································································································

322

Advanced Meson Science Laboratory ····························································································327

RIKEN-BNL Research Center ·····································································································

332

Theory Group ··················································································································

333

Computing Group ·············································································································

335

Experimental Group ··········································································································

340

RIKEN Facility Ofﬁce at RAL ····································································································

344

RIBF Research Division
Radioactive Isotope Physics Laboratory ·························································································

347

Spin isospin Laboratory ·············································································································

355

Nuclear Spectroscopy Laboratory ·································································································

362

High Energy Astrophysics Laboratory ····························································································

366

Astro-Glaciology Research Unit ··································································································

370

Research Group for Superheavy Element ························································································

373

Superheavy Element Production Team ·····················································································

376

CONTENTS

RIKEN Accel. Prog. Rep. 50 (2017)

Superheavy Element Device Development Team ········································································

379

Nuclear Transmutation Data Research Group ···················································································

381

Fast RI Data Team ············································································································

382

Slow RI Data Team ···········································································································

384

Muon Data Team ··············································································································

385

High-Intensity Accelerator R&D Group ··························································································

387

High-Gradient Cavity R&D Team ··························································································

388

High-Power Target R&D Team ·····························································································

389

Accelerator Group ···················································································································

390

Accelerator R&D Team ······································································································

391

Ion Source Team ··············································································································

393

RILAC Team ··················································································································

394

Cyclotron Team ···············································································································

395

Beam Dynamics & Diagnostics Team ·····················································································

396

Cryogenic Technology Team ································································································

398

Infrastructure Management Team ··························································································

399

Instrumentation Development Group ·····························································································400

SLOWRI Team ················································································································

401

Rare RI-ring Team ············································································································

404

SCRIT Team ···················································································································

408

Research Instruments Group ·······································································································

411

BigRIPS Team ·················································································································

412

SAMURAI Team ··············································································································

416

Computing and Network Team ······························································································

419

Detector Team ·················································································································

421

Accelerator Applications Research Group ·······················································································

423

Ion Beam Breeding Team ····································································································424

RI Applications Team ·········································································································

428

User Liaison and Industrial Cooperation Group ·················································································

433

RIBF User Liaison Team (User Support Ofﬁce) ··········································································

434

Industrial Cooperation Team ································································································

435

Safety Management Group ·········································································································

437

Partner Institution ··························································································································

439

Center for Nuclear Study, Graduate School of Science, The University of Tokyo ·········································

440

Center for Radioactive Ion Beam Sciences, Institute of Natural Science and Technology, Niigata University ········

451

Wako Nuclear Science Center, IPNS (Institute for Particle and Nuclear Studies),
KEK (High Energy Accelerator Research Organization) ································································

455

Events (April 2016 - March 2017) ·······································································································

458

Press Releases (April 2016 - March 2017) ·····························································································

459

Ⅶ. LIST OF PREPRINTS
List of Preprints (April 2016 - March 2017) ···························································································

461

Ⅷ. LIST OF SYMPOSIA, WORKSHOPS & SEMINARS
List of Symposia & Workshops (April 2016 - March 2017) ·········································································

465

List of Seminars (April 2016 - March 2017) ···························································································

467