CONTENTS

RIKEN Accel. Prog. Rep. 51 (2018)

C O N T E N T S
PagePREFACE

Ⅰ. HIGHLIGHTS OF THE YEAR
Persistence of the Z = 28 shell gap around 78Ni: first spectroscopy of 79Cu··························································
L. Olivier et al.

1

Decay properties of neutron-rich nuclei around mass A = 100········································································
S. Nishimura et al.

2

Discovery of new isotopes 81, 82Mo and 85, 86Ru and a determination of the particle instability of 103Sb··························
H. Suzuki et al.

3

Discovery of 72Rb: A nuclear sandbank beyond the proton drip line··································································
H. Suzuki et al.

4

Determination of fusion barrier distributions from quasielastic scattering cross sections towards superheavy nuclei
synthesis································································································································
T. Tanaka et al.
Direct mass measurement of neutron-rich calcium isotopes, 55–57Ca··································································
S. Michimasa et al.
Observation of new neutron-rich isotopes among flssion fragments from in-flight flssion of 345 MeV/nucleon 238U:
search for new isotopes conducted concurrently with decay measurement campaigns······································
Y. Shimizu et al.

5
6

7

Identication of New Neutron-rich Isotopes in the Rare-Earth Region Produced by 345 MeV/nucleon 238U····················
N. Fukuda et al.

8

Direct mass measurement of a T1/2 = 10 ms nucleus with a relative precision of 10−7 level········································
M. Wada et al.

9Supernova equation of state based on realistic nuclear forces·········································································
H. Togashi et al.

10Single electron yields of charm and bottom hadron decays in central Au+Au collisions at √ sNN = 200 GeV··················
K. Nagashima et al.

11

Are two nucleons bound in lattice QCD for heavy quark masses?····································································
T. Iritani

12

Origin of the fake eigen energy of the two-baryon system in lattice QCD···························································
T. Iritani

13Λc → N form factors from lattice QCD and phenomenology of Λc → nℓ+νℓ and Λc → p μ+μ− decays····························
S. Meinel

14

Lattice QCD calculation of neutral D-meson mixing matrix elements·······························································
E. Neil15

A prototype novel laser-melting sampler for analyzing ice cores with high depth resolution and high throughput············
M. Maruyama et al.

16

Production of vanadium-ion beam from RIKEN 28 GHz SC-ECRIS································································
Y. Higurashi et al.

17

Doughnut-shaped gas cell for KEK Isotope Separation System·······································································
Y. Hirayama et al.

18

Development of an off-axis electron beam source for cold highly charged ion generation in a linear combined ion trap····N. Kimura

19

TINA - a silicon tracker for transfer reactions···························································································
P. Schrock et al.

20

Spot size estimation for laser aiming system of ion microbeam irradiation using a tapered glass capillary optics·············
K. Sato et al.

21

Magnetic moments and ordered states in pyrochlore iridates Nd2Ir2O7 and Sm2Ir2O7 studied by muon-spin relaxation·······
R. Asih and I. Watanabe

22

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Effect of Fe substitution on Cu-spin dynamics in the electron-doped cuprates Eu2−xCexCuO4+α−δ ································
Risdiana

23

One-pot three-component double-click method for synthesis of [67Cu]-labeled biomolecular radiotherapeutics···············
K. Fujiki and K. Tanaka et al.

24

Cross section measurement to produce 99Mo through alpha-induced reactions on natural Zr·····································
T. Murata et al.

25

Analysis of carbon ion-induced mutations by exome sequencing of an unselected rice population······························
H. Ichida et al.

26

Effect of LET on mutational function revealed by whole-genome resequencing of Arabidopsis mutants······················
Y. Kazama et al.

27

Ⅱ. RESEARCH ACTIVITIES I (Nuclear, Particle and Astro-Physics)
1. Nuclear Physics
Single-neutron knockout from 20C and the structure of 19C·············································································
J.W. Hwang et al.

29

Observation of isoscalar and isovector dipole excitations in 20O······································································
N. Nakatsuka and H. Baba

30

Neutron-neutron correlation in Borromean nucleus 11Li via the (p, pn) reaction····················································
Y. Kubota et al.

31

Differential cross section of proton elastic scattering from neutron-rich 6He at 200 A MeV
and high momentum transfers·······································································································
S. Chebotaryov et al.

32

Two methods for invariant mass reconstruction from events with multiple charged particles····································
S. Koyama et al.

33

Electric dipole responses of 50Ca and 52Ca································································································
Y. Togano et al.

34

Many-neutron systems: search for superheavy 7H and its tetraneutron decay·······················································F. M. Marqués and Z. Yang

35

Low-energy dipole response of the halo nuclei 6, 8He···················································································
C. Lehr and T. Aumann et al.

36

Investigation of the tetraneutron by quasi-free α-knockout from 8He·································································
F. Schindler and T. Aumann et al.

37

Shell evolution at N = 40 towards 60Ca: Spectroscopy of 62Ti··········································································
M. L. Cortés et al.

38

Spectroscopy of Sc isotopes between the N = 34 and N = 40 subshell closures·····················································
P. Koseoglou et al.

39

Production of very neutron-rich nuclei via two-proton knockout reaction with deuterium operation of MINOS··············
M. Miwa et al.

40

Study on the impact parameter dependence on the trigger efficiency for the SπRIT experiment·································
M. Kaneko et al.

41

Status of collective flow analysis for SπRIT-TPC experiment·········································································
M. Kurata-Nishimura

42

Gamma decay of unbound neutron-hole states in 133Sn·················································································
V. Vaquero et al.

43

Shell evolution beyond Z = 28 and N = 50: spectroscopy of 81–84Zn··································································
C.M. Shand and Zs. Podolyak et al.

44

Robustness of the N = 34 shell closure: First spectroscopy of 52Ar···································································
H. N. Liu et al.

45

First Spectroscopic study of 56Ca··········································································································
S. Chen and F. Browne et al.

46

Triaxiality of neutron-rich 84,86,88Ge from low-energy spectra··········································································
M. Lettmann et al.

47

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Precise measurement of the 4He(8He,8Be) reaction······················································································
S. Masuoka et al.

48

Measurement of 77, 79Se(d, p)78, 80Se reactions as a surrogate for 79Se(n, γ)80Se reaction············································
N. Imai49

Spallation reaction study of 136Xe on proton, deuteron and carbon····································································
X. Sun and H. Wang et al.

50

Measurements of new beta-delayed neutron emission properties around doubly magic 78Ni·····································
K. Rykaczewski et al.

51

Beta-neutron-gamma spectroscopy of beta-delayed neutron emitters around doubly-magic 78Ni································
K. Rykaczewski et al.

52

Measuring the β-decay properties of Na-Al species located at the neutron drip line···············································
P. V. Phong et al.

53

Measurement of β-delayed neutron emission probabilities for progenitors of the A = 130 r-process abundance peak········
J. Liu and V. H. Phong et al.

54

β-delayed neutron emission probabilities for understanding the formation of the r-process rare-earth peak····················
G. G. Kiss et al.

55

Study of the superallowed 0+ → 0+ β decay of 70Br······················································································
A. I. Morales et al.

56

Results on 64As decay measured at BigRIPS·····························································································
B. Rubio57

γ rays identified in the decay chain of 64Se measured with EURICA·································································
P. Aguilera and F. Molina et al.

58

Isomer-decay spectroscopy of 67Fe and reaction-channel dependency of isomeric ratios from interactionsin the MINOS proton target··········································································································
P.-A. Söderström et al.

59

Beta-decay half-lives of 78Kr fragments from Cu to Ge················································································
T. Goigoux et al.

60

Isomer spectroscopy of 92, 94Se in the SEASTAR 2015 experiment···································································
C. Lizarazo et al.

61γ-decaying isomers and isomeric ratios in the 100Sn region·············································································
J. Park et al.

62

Coexisting Single-Particle and Collective Structures in 137Sb··········································································
J. Keatings

63

Investigation of octupole correlations of neutron-rich Z ～ 56 isotopes by β-γ spectroscopy·····································
R. Yokoyama et al.

64

First result of elastic electron scattering from 132Xe at the SCRIT facility···························································
K. Tsukada et al.

65→Complete set of deuteron analyzing powers from d p elastic scattering at 190 MeV/nucleon·····································
K. Sekiguchi et al.

66

Single-particle states and collective modes: magnetic moment of 75mCu·····························································
Y. Ichikawa et al.

67

Track reconstruction of recoil particles in CAT-S at RIBF113: 132Sn(d,d’) measurement··········································
S. Ota et al.

68

Atomic masses of intermediate-mass neutron-deficient nuclei with sub-ppm precision via multireflection
time-of-flight mass spectrograph····································································································
S. Kimura et al.

69

Decay measurement of 283Cn produced in the 238U(48Ca,3n) reaction using GARIS-II·············································
D. Kaji et al.

70

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

71

The structure and decay of high-K isomers in 187Ta·····················································································
P.M. Walker et al.

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Nuclear spectroscopy of 196,197,198Ir isotopes·······························································································
M. Mukai et al.

73

Ground-state electromagnetic moments of 21O···························································································
A. Gladkov et al.

74

β-NQR measurement of the 23Ne ground state···························································································
H. Nishibata et al.

75

26m

Al proton resonant elastic scattering with CRIB······················································································
D. Kahl and H. Shimizu et al.

76

Development of a high density 7Be beam at CRIB······················································································
A. Inoue

77

Experimental setup of the 6He(p, n) measurement at HIMAC and identification of the charge-exchange (p, n)reaction channel························································································································
M. Sasano et al.

78

RI beam production at BigRIPS in 2017··································································································
D.S. Ahn et al.

79

Observation of new neutron-rich Mn, Fe, Co, Ni, and Cu isotopes in the vicinity of 78Ni·········································
T. Sumikama et al.

81

New isotope of 39Na and the neutron dripline of neon isotopes using a 345 MeV/nucleon 48Ca beam···························
D.S. Ahn et al.

82

Exploration of the 60Ca region··············································································································
O.B.Tarasov et al.

83

New isotope search conducted concurrently with BRIKEN campaign·······························································
Y. Shimizu et al.

84

Production of neutron-rich nuclei in the vicinity of N = 126 by means of projectile fragmentationof 345 MeV/nucleon 238U·············································································································
N. Fukuda et al.
Cross-section measurement of neutron-rich Pd isotopes produced from an RI beam of 132Sn at 280 MeV/nucleon···········
H. Suzuki et al.

85
86

2. Nuclear Physics (Theory)
Mesic nuclei with a heavy antiquark······································································································
Y. Yamaguchi and S. Yasui

87

Interplay between isoscalar and isovector correlations in neutron-rich nuclei·······················································
I. Hamamoto and H. Sagawa

88

New interpretation of pairing anti-halo effect····························································································
K. Hagino and H. Sagawa

89

Role of deformation in odd-even staggering in reaction cross sections for 30,31,32Ne and 36,37,38Mg isotopes·····················Y. Urata, K. Hagino and H.Sagawa

90

Enhancement of pairing fluctuation in neutron-rich Mg isotopes studied by Skyrme QRPA calculation························
M. Yamagami

91

Testing constant-temperature approach for nuclear level density·····································································
N. Dinh Dang et al.

92

Giant dipole resonance and shape transitions in hot and rotating 88Mo·······························································A. K. Rhine Kumar et al.

93

Level density and thermodynamics in hot rotating 96Tc nucleus·······································································
B. Dey et al.

94

Shell-model description of magnetic dipole bands in 105Sn·············································································
M. Honma et al.

95

Effect of pairing on the wobbling motion in odd-A nuclei·············································································
K. Sugawara-Tanabe and K. Tanabe

96

Application of a Coulomb energy density functional for atomic nuclei: Case studies of local density approximationand generalized gradient approximation····························································································
T. Naito et al.

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Joint project for large-scale nuclear structure calculations in 2017···································································
N. Shimizu et al.

98

3. Nuclear Data
Proton- and deuteron-induced reactions on 107Pd and 93Zr at 20–30 MeV/nucleon·················································
M. Dozono et al.
Measurement of isotopic production cross sections of proton- and deuteron-induced spallation reactions on 93Zr
at 200 MeV/nucleon···················································································································
S. Kawase et al.

99

100

Measurement of double-differential neutron yields for 345 MeV/nucleon 238U incidence on Cu·································
K. Sugihara et al.

101

Construction of implantation beam line for the verification test of 107Pd transmutation············································
Y. Miyake et al.

102

A study of additional uncertainties from fit boundaries using a new code for multi-reflection time-of-flight data·············
M. Rosenbusch et al.

103

EXFOR Compilation of RIBF data in 2017······························································································
D. Ichinkhorloo et al.

104

Monte-Carlo simulation of transmutation based on experimental nuclear data·····················································
S. Ebata et al.

105

4. Hadron Physics
Final result of nuclear dependence on AN for forward neutron production in polarized p+A collisionsat √ sNN = 200 GeV····················································································································
M. Kim et al.
Coulomb-nuclear interference effects on forward π0 production in polarized-proton–nucleus collisions·······················
G. Mitsuka
Preparatory work toward measurement of the azimuthal anisotropy of heavy quark electrons in Au+Au collisionsat √ sNN = 200 GeV····················································································································
Y. Ueda et al.

107
108

109

Study of azimuthal anisotropy of charged particles in Au+Au collisions at √ sNN = 200 GeV at RHIC-PHENIX··············
R. Nishitani

110

Single transverse spin asymmetry (AN) in polarized p + Au collisions at √ sNN = 200 GeV········································Y. H. Yoo et al.

111

Operation summary of the RHICf experimet·····························································································J. S. Park112

RHICf-STAR common operation in √ s = 510 GeV proton-proton collisions·······················································
M. Ueno et al.

113

Beam polarization monitor in √ s = 510 GeV polarized proton-proton collisions at the RHICf experiment····················M. H. Kim

114

DAQ performances of the RHICf operation in 2017····················································································
H. Menjo et al.

115

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

116

Status of measurements of Drell–Yan process at FNAL SeaQuest····································································
K. Nakano et al.

117

Design of the innermost layer module of the silicon tracking detector for the sPHENIX experiment···························
Y. Yamaguchi et al.

118

5. Hadron Physics (Theory)
Covariant calculation of quark distribution functions in ρ+-meson···································································
Y. Ninomiya et al.

119ΣN and ΛN interactions from 2 + 1 flavor lattice QCD with almost physical masses··············································
H. Nemura et al.

120

P-wave ππ scattering and the ρ resonance from lattice QCD··········································································
C. Alexandrou et al.

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Computing the nucleon charge and axial radii directly at Q2 = 0 in lattice QCD····················································
N. Hasan et al.

122

6. Particle Physics
Phenomenology of Λb → Λcτ ν̄ using lattice QCD calculations········································································
A. Datta et al.

123

A pilot study of proton decay matrix elements at physical quark mass·······························································
Y. Aoki et al.

124

Unified scenario for composite right-handed neutrinos and dark matter·····························································
E. Rinaldi et al.

125

Empirical formulae of the masses of elementary particles·············································································
Y. Akiba

126

Exact algebraic separability criterion for two-qubit systems···········································································
K. Fujikawa and C. H. Oh

127

Conformal Quantum Mechanics and Sine-Square Deformation·······································································
T. Tada128

7. Astrophysics and Astro-Glaciology
Measurements of nitric acid formation in humidified air by proton irradiation·····················································
Y. Nakai et al.

129

8. Accelerator
Cooling down test of prototype accelerator system based on SC-QWR······························································
K. Ozeki et al.

131

Transfer of GARIS-II and charge-state multiplier (CSM) cavities····································································
Y. Watanabe et al.

132

Magnet power supplies for GARIS-II·····································································································
K. Kumagai et al.

133

Residual Gas Effect in LEBT on the Transverse Emittance of Multiply-Charged Heavy Ion Beams Extracted
from ECRIS····························································································································
T. Nagatomo et al.

134

An innovative method for 12C4+ suppression in 18O6+ beam production in an electron cyclotron resonance ion source········
H. Muto et al.

135

Renewal of control system and driving mechanism of cavity tuning devices for RILAC Rebuncher····························
K. Yamada et al.

136

Installation of new central region for energy upgrade at RIKEN AVF cyclotron···················································
J. Ohnishi et al.

137

Improvement of injection beam-orbit analysis of AVF cyclotron·····································································
Y. Kotaka et al.

138

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

139

Update plan of the existing beam interlock system for the RIBF······································································
M. Komiyama et al.

140

Upgrade of server systems for RIBF control·····························································································
A. Uchiyama et al.

141

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

142

Operation report 2017 for Nishina and RIBF water-cooling systems·································································
T. Maie et al.

143

Measurement of electron density and temperature in plasma window with diameter of 10 mm··································
N. Ikoma et al.

144

9. Instrumentation
Pulse-shape data taking with double-sided strip silicon detector······································································
D. Suzuki et al.

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Stress Test of digital DAQ system for PANDORA······················································································
J. GAO et al.

146

Development of a high resolution neutron detector HIME·············································································A. T. Saito

147

Development and test of the dual-gain ASIC preamplifier boards for the GLAST silicon-strip detectors·······················
V. Panin et al.

148

A silicon vertex tracker for the 8He(p, pα)4n reaction···················································································
F. Dufter et al.

149

First implementation of the new segmented implantation detector for decay studies with BRIKEN array·····················
R. Grzywacz

150

Preparation of the VANDLE array for beta decay studies at RIBF····································································
S. Go et al.

151

Timing performance of a mirror-type MCP detector use for mass measurements at the Rare RI Ring··························
Z. Ge et al.

152

Delay-line Anode for MCP-based Position Sensitive Detector at Rare RI Ring····················································
H. F. Li et al.

153

Improvement of detection efficiency of time-of-flight detector with large effective area··········································
S. Ishizawa et al.

154

Performance test of low-pressure MWDC for missing mass spectroscopy at BigRIPS············································
T. Nishi et al.

155

Development of the gaseous Xe scintillation detector··················································································
J. Zenihiro et al.

156

Development of α-ToF detector for correlation measurement of atomic masses and decay properties
of superheavy nuclides················································································································
T. Niwase et al.

157

DALI2+ at the RIKEN Nishina Center RIBF····························································································
I. Murray et al.

158

Improvement of the maintenance environment for Ge detectors······································································
H. Sato et al.

159

Overview of silicon strip sensor detector development for sPHENIX experiment·················································
I. Nakagawa et al.

160

Development of long multi-layered flexible cable of silicon sensor detector for sPHENIX experiment························
M. Tsuruta

161

Research and development of very long and dense data bus for sPHENIX INTT detector········································
T. Hachiya et al.

162

Commissioning of the OEDO beamline··································································································
S. Michimasa et al.

163

Optimization of sextupole magnets in the BigRIPS fragment separator for a high-purity RI beam······························
T. Sumikama et al.

164

Improvement of transmission efficiency for the rare-RI ring··········································································
Y. Yamaguchi et al.

165

Investigation of transmission efficiency loss at Rare-RI Ring·········································································S. Naimi and Y. Yamaguchi et al.

166

Isochronous condition in Rare RI Ring···································································································
Y. Abe et al.

167

Present status of data analysis of commissioning experiment using exotic nuclei··················································
D. Nagae et al.

168

The progress of on-line commissioning study on parasitic production of low-energy RI-beam system (PALIS)
at BigRIPS······························································································································
T. Sonoda
Improved wide bandwidth mass analysis with MRTOF-MS···········································································
P. Schury and M. Wada et al.

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Surface temperature measurements of the high power beam dump of the BigRIPS separator····································
K. Yoshida et al.

171

Thermo-mechanical calculations of the high power beam dump of the BigRIPS separator·······································
Z. Korkulu et al.

172

Present status of the beam transport line from SRC to BigRIPS······································································
K. Kusaka et al.

173

Present status of ERIS at the SCRIT electron scattering facility······································································
T. Ohnishi et al.

174

Progress in the dc-to-pulse converter FRAC·····························································································
M. Wakasugi et al.

175

Improvements on the racetrack microtron at SCRIT····················································································
A. Enokizono et al.

176

Electron energy stabilization at the electron gun in RTM··············································································
M. Watanabe et al.

177

High pressure cold gas target system with large capacity for low-energy beam at RIBF··········································
R. Nakajima and S. Koyama

178

Resonance ionization spectroscopy of Nb utilizing a narrowband injection-locked Titanium:Sapphire laser··················
M. Reponen et al.

179

Development of co-located 129Xe and 131Xe nuclear spin masers with external feedback scheme································
T. Sato et al.

180

Searching optimum measurement conditions of the laser-microwave double resonance for the atoms stopped
in superfluid helium···················································································································
M. Sanjo et al.
Optimizing the conditions to measure the hyperfine splitting in the μp ground state···············································
A. Vacchi, K. Ishida and E. Mocc
Neutron spin filter with dynamic nuclear polarization using photo-excited triplet electron for T-violation searchin a compound nucleus················································································································S. Takada et al.

181
182

183

Trigger selector system for BigRIPS DAQ·······························································································
H. Baba et al.

184

Beam preparation for industrial utilization of Ar, Kr, Xe, and Au beams····························································
A. Yoshida and T. Kambara

185

Evaluation of radioactivity in semiconductor samples by Kr-ion beam irradiation·················································
T. Kambara and A. Yoshida

186

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

187

CCJ operations in 2017······················································································································
S. Yokkaichi et al.

188

Ⅲ. RESEARCH ACTIVITIES II (Material Science and Biology)
1. Atomic and Solid State Physics (Ion)
Anomalous peak effect in 122-type iron-based superconductors······································································
T. Tamegai et al.

189

Evolution of Kr precipitates in Kr-implanted Al as observed by the channelling method·········································
E. Yagi and S. Takagi

190

Magnetism of the antiferromagnetic spin-3/2 dimer compound CrVMoO7 having an antiferromagneticallyordered state····························································································································
M. Hase et al.

191

Investigation of single-event effect observed in GaN-HEMT·········································································
Y. Nakada et al.

192

Profile measurements of laser beam for the aiming system of ion microbeam irradiation with glass capillaries···············
K. Hirose et al.

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2. Atomic and Solid State Physics (Muon)
First measurement of magnetic correlations in T-214 cuprate········································································K. M. Suzuki et al.

195

Nano-size effect on Néel temperature and magnetic ordering of La2CuO4 ··························································
S. Winarsih et al.

196

Effect of Supercell Calculation on Muon Sites in La2CuO4 ···········································································
M. R. Ramadhan et al.

197

Modulated Kubo-Toyabe functions to study fluctuated weak magnetism and muon diffusion at pseudogap stateof underdoped La2−xSrxCuO4 ········································································································
M. D. Umar

198

Study of Implanted Muons in YBa2Cu3O6 ·······························································································
I. Ramli et al.

199

μSR study of FeSe1−xSx around nematic critical point···················································································Y. Tanabe et al.

200

Caged-type superconductor Sc5Ru6Sn18 probed by μSR················································································
L. J. Chang et al.

201

Spin fragmentation in Nd2Ir2O7 and its carrier-doped dependence····································································
R. Asih and I. Watanabe

202

Spin dynamics in the S = 1/2 zigzag spin chain magnets K2CuCl2SO4 and Na2CuCl2SO4 ········································
M. Fujihala et al.

203

Study of Magnetic Ordering by p-orbital in RbO2 using μSR··········································································
F. Astuti

204

Muon spin relaxation study on the new organic spin liquid material λ-(STF)2GaCl4 ··············································
T. Minamidate et al.

205

Superconducting gap symmetry in organic superconductor λ-(BETS)2GaCl4 studied by μSR with DFT·······················
D. P. Sari et al.

206

Effect of light irradiation on charge carrier dynamics in active layer hybrid solar cells···········································
L. Safriani

207

Electron Transport Studies in Biological Molecules with respect to Ageing Science··············································
H. Rozak and I. Watanabe

208

Approach to determination of muon stopping sites in proteins········································································
Y. Sugawara et al.

209

Time dependence of dipole width obtained by zero-field μSR for Al and Al-0.5 at.%Si···········································
K. Nishimura et al.

210

μSR investigation of atomic structure and photocatalytic properties of defects in rutile TiO2 crystal····························
H. Ariga-Miwa et al.

211

Observation of Li in graphite by muonic x-rays·························································································
I. Umegaki et al.

212

Development of the in-situ electronic-field-application μSR technique and test application to multiferroic systems·········
R. Asih and I. Watanabe

213

Development of an intense mid-infrared coherent light source for muonic hydrogen spectroscopy·····························
S. Kanda et al.

214

3. Radiochemistry and Nuclear Chemistry
Solid-liquid extraction of Mo and W by Aliquat 336 from HCl solutions toward extraction chromatography
experiments of Sg·····················································································································
Y. Komori et al.

215

Reversed-phase chromatography for element 105, Db with Aliquat 336 resin from 2.7 M and 27 M HF solutions···········
D. Sato et al.

216

Solvent extraction of Rf in the Aliquat 336/HCl system using flow-type extraction apparatus···································
N. Kondo et al.

217

Anion and cation exchanges of Zr, Hf, and Th in H2SO4 for chemical study of Rf·················································
T. Yokokita et al.

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Solvent extraction behavior of Zr and Hf with 2-furoyltrifluoroacetone as model experiments
for rutherfordium (element 104)·····································································································
K. Ooe et al.

219

Activation cross sections of α-induced reactions on natIn for 117mSn production·····················································
M. Aikawa et al.

220

Prodution cross sections of 169Yb and 167,168,170Tm isotopes in deuteron-induced reactions on 169Tm·····························
M. Saito et al.

221

Production cross sections of 177gLu in α-induced reactions on natYb···································································
M. Saito et al.

222

Activation cross sections of alpha-induced reactions on natural tungsten for 186Re and 188Re production·······················
N. Ukon et al.

223

Measurement of excitation functions of the 206/207/208Pb(11B, x)212Fr reactions························································
Y. Komori et al.

224

Improved method for preparation of no-carrier added 28Mg tracer····································································
H. Kikunaga et al.

225

Production of no-carrier-added barium tracer of 135mBa·················································································
S. Yano et al.

226

Trial of astatine separation using column chromatography············································································
H. Ikeda et al.

227

Wet chemistry processes utilized in development of 211Rn/211At generator for targeted alpha therapy···························
Y. Shin et al.

228

Development of Np standard material for accelerator mass spectrometry···························································
A. Yokoyama et al.

229

99

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

230

Fractionation of Zr-Hf in ferromanganese crusts························································································
J. Inagaki et al.

231

Desorption of 88Zr from soil with artificial digestive juices············································································
T. Kubota et al.

232

4. Radiation Chemistry and Biology
Recruitment of Rad51 and phosphorylated DNA-PKcs after heavy-ion irradiation of human normal fibroblast ··············
M. Izumi et al.

233

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

234

Results of whole-genome analysis of mahogany mutant···············································································
K. Tsuneizumi et al.

235

Chromosomal rearrangement induced by high-LET heavy-ion-beam irradiation in Parachlorella kessleri····················
K. Ishii et al.

236

Trials of mutation detection programs to detect structural variations induced by heavy-ion beams in rice·····················
R. Morita et al.

237Comparison of LET effect of heavy-ion beam irradiation in rice·····································································
Y. Hayashi et al.

238

Relationship between early-flowering mutation and LET-Gy combination of ion beam irradiation in durum wheat··········
K. Murai et al.

239

Analysis of DNA damage response in Cyrtanthus pollen after Ar-ion beam irradiation···········································
T. Hirano et al.

240

Isolation of C4 Flaveria bidentis mutants with reduced quenching of chlorophyll fluorescencefrom heavy-ion-beam-mutagenized M2 population···············································································
T. Ogawa et al.

241

Development of flower color mutations from the light-yellow mutant of spray-mum ‘Southern Chelsea’
by heavy-ion beam re-irradiation····································································································
M. Tamari et al.

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Effects of heavy-ion-beam irradiation on survival in Eisenia arborea ·······························································
H. Yamada et al.

243

Argon-ion-beam mutagenesis of the plant-symbiotic edible mushroom Tricholoma matsutake ·······························
H. Murata et al.

244

Current status of development of ion microbeam device with tapered glass capillary for biological use·······················
T. Ikeda et al.

245

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

247

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

248Electric power condition of Wako campus in 2017······················································································
E. Ikezawa et al.

249

Operation report on the ring cyclotrons in the RIBF accelerator complex···························································
M. Nishimura et al.

250

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

251

Operation report on the RIKEN AVF cyclotron for 2017···············································································
R. Koyama et al.

252

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

253

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

254

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

255

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

257

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

258

Ⅴ. EVENTS
ImPACT-OEDO workshop··················································································································
H. Otsu et al.

259

Nishina School 2017·························································································································
T. Motobayashi and H. Ueno

260

IUPAP Meetings and Nuclear Science Symposium at Nihon-Bashi··································································
H. En’yo261International conference on nuclear physics at storage rings (STORI2017)·························································
M. Wakasugi

262International symposium on RI beam physics in the 21st century: 10th anniversary of RIBF····································
T. Isobe et al.

263

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

265

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

266

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

266

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

267

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

268

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

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

275

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

276

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

278

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

283

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

286

Advanced Meson Science Laboratory······························································································291

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

297

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

298

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

300

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

307

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

311

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

315

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

324

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

330

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

335

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

339

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

342

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

345

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

347

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

349

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

350

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

352

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

353

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

355

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

356

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

358

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

359

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

360

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

362

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

363

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

364

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

366

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

368

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

369

Instrumentation Development Group·······························································································370

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

371

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

375

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

378

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

381

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

382

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

387

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

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

392

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

394

Ion Beam Breeding Team······································································································395

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

399

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

405

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

406

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

407

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

409

Partner Institutions···························································································································

411

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

412

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

424

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

427

Events (April 2017 - March 2018)·········································································································

430

Press Releases (April 2017 - March 2018)·······························································································

431

Ⅶ. LIST OF PREPRINTS
List of Preprints (April 2017 - March 2018)······························································································433

Ⅷ. LIST OF SYMPOSIA, WORKSHOPS & SEMINARS
List of Symposia & Workshops (April 2017 - March 2018)···········································································

437

List of Seminars (April 2017 - March 2018)·····························································································

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