For Researchers

RIKEN Accelerator Progress Report

RIKEN Accelerator Progress Report 2021 Vol. 55

 Full Set PDF [PDF 69.2MB]


COVER  
IMPRINT  
CONTENTS  

  Page
PREFACE  
GRAVURE
FEATURE ARTICLE
RNC’s initiatives in the ImPACT program S1
   
Ⅰ. HIGHLIGHTS OF THE YEAR  
Investigation of a new production and separation technique for RI beams at BigRIPS, “In-separator two-step method”
H. Suzuki et al.
S7
Three quasiparticle isomers in odd-even 159, 161Pm: Calling for modified spin-orbit interaction for the neutron-rich region
R. Yokoyama et al.
S8
Pairing forces govern population of doubly magic 54Ca from direct reactions
F. Browne et al.
S9
Structure of 17B studied by the quasifree neutron knockout reaction
Z. H. Yang et al.
S10
Probing the symmetry energy with the spectral pion ratio
J. Estee et al.
S11
Rapidity distributions of Z = 1 isotopes and the nuclear symmetry energy from Sn + Sn collisions with radioactive beams at 270 MeV/nucleon
M. Kaneko et al.
S12
Estimation of radiative half-life of 229mTh by half-life measurement of other nuclear excited states in 229Th
Y. Shigekawa et al.
S13
Toward ab initio charge symmetry breaking in nuclear energy density functionals
T. Naito et al.
S14
Total reaction cross sections in the island of inversion near N = 40
W. Horiuchi et al.
S15
Asymmetry of antimatter in the proton
Y. Goto et al.
S16
Gluon EMC effects in nuclear matter
X.-G. Wang et al.
S17
Production of highly charged calcium-ion beam using high-temperature oven
T. Nagatomo et al.
S18
First transport of unstable nuclei into SCRIT system
Y. Abe et al.
S19
Performance study of wide dynamic range photon detection system using Ge detectors for muonic X-ray spectroscopy
R. Mizuno et al.
S20
Development of inspection system for bus extender cable of RHIC-sPHENIX INTT detector
H. Imai et al.
S21
Simple cubic self-assembly of PbS quantum dots by fine ligand control
J. Liu, Y.-J. Pu et al.
S22
Co-precipitation behaviour of single atoms of rutherfordium in basic solutions
Y. Kasamatsu et al.
S23
Sodium ascorbate protects 211At-labeled antibodies from reactive oxygen species damage
S. Manabe et al.
S25
Intratumoral administration of astatine-211-labeled gold nanoparticle for alpha therapy
H. Kato et al.
S26
Activation cross sections of proton-induced reactions on praseodymium up to 30 MeV
M. Aikawa et al.
S28
Activation cross section measurement of alpha-particle induced reactions on natural neodymium
M. Sakaguchi
S29
Argon-ion-induced mutations in Arabidopsis EGY1 gene affect chloroplast development in leaf guard cells
A. Sanjaya et al.
S30
 
Ⅱ. RESEARCH ACTIVITIES I (Nuclear, Particle and Astro-Physics)  
1. Nuclear Physics  
RI beam production at BigRIPS in 2021
H. Takeda et al.
1
Status of the mass measurement of neutron-rich nuclei at A ~ 50–60 using SLOWRI/ZD-MRTOF
S. Iimura et al.
3
Highly precise mass measurements of neutron-rich nuclei at A = 82–92 at ZeroDegree-MRTOF(ZD-MRTOF)
W. Xian, M. Rosenbusch et al.
4
Mass measurements of neutron-rich nuclei around A = 112 with ZD-MRTOF-MS system
D. Hou, A. Takamine et al.
5
Improved mass measurement of 257Db by decay-correlated mass spectroscopy
P. Schury et al.
6
Initial mass measurement of 258Db by decay-correlated mass spectroscopy
P. Schury et al.
7
Status of the study of masses and half-lives of 252Cf fission fragments by the MRTOF-MS
S. Kimura et al.
8
First measurement of double Gamow-Teller giant resonance at RIBF
A. Sakaue
9
Spectroscopy of pionic atoms in tin isotopes by (d, 3He) reactions
S. Y. Matsumoto et al.
10
Spectroscopy of three-neutron system via the 3H(t, 3He)3n reaction
K. Miki et al.
11
Re-measurement of the 4He(8He, 8Be) reaction
S. Masuoka et al.
12
Mass measurements of neutron-rich Ni isotopes in Rare-RI Ring II
A. Ozawa et al.
13
Mass measurements with the Rare-RI ring for the A = 130 r-process abundance peak II
S. Naimi et al.
14
Decay spectroscopy in exotic neutron-rich nuclei near the N = 50 shell closure
C. J. Griffi n et al.
15
Half-lives and β-delayed neutron emission for the most exotic neutron-rich Se and Br isotopes
R. Caballero-Folch et al.
16
Identification of a new μs-isomer in the REP region
A. Vitéz-Sveiczer, G. G. Kiss et al.
17
RIBF181: γ-ray spectroscopy in the vicinity of 78Ni
R. Taniuchi et al.
18
Neutron intruder states and collectivity beyond N = 50 towards 78Ni
L. Plagnol, F. Flavigny et al.
19
Charge state separation in the ZD spectrometer for the 132Sn region
T. Parry et al.
20
Observation of low-lying dipole states in the 11Li(p, n) reaction
L. Stuhl et al.
21
Analysis of 48Cr(p, n) reaction in inverse kinematics
M. Sasano et al.
22
Measurement of proton elastic scattering from 132Sn at 300 MeV/nucleon in inverse kinematics
T. Harada et al.
23
Commissioning study of SCRIT facility with 138Ba nucleus
K. Tsukada et al.
24
Yield measurements for 86Kr + 198Pt at KISS
Y. X. Watanabe et al.
25
In-gas-cell laser ionization spectroscopy of 200gPt using MRTOF-MS at KISS
Y. Hirayama et al.
26
Isomer spectroscopy using multi-nucleon transfer reaction on 248Cm
S. Go et al.
27
Proton entropy excess and possible signature of pairing reentrance in hot nuclei
B. Dey et al.
28
The ONOKORO project—Toward comprehensive understanding on clustering in heavy nuclei
T. Uesaka, J. Zenihiro et al.
29
2. Nuclear Physics (Theory)  
Practical method for decomposing discretized breakup cross sections into components of each channel
S. Watanabe et al.
31
Effects of the Skyrme tensor force on 0+, 2+, and 3 states in 16O and 40Ca nuclei with second random phase approximation
M. J. Yang, C. L. Bai, and H. Sagawa
32
On the deformability of atoms
T. Naito et al.
33
Comparative study of the dineutron in Borromean nuclei 11Li and 22C
M. Yamagami
34
Nuclear surface diffuseness of Ne and Mg isotopes in the island of inversion
V. Choudhary et al.
35
Study of β-delayed one-neutron emission probabilities using a neural network model
D. Wu, C. L. Bai, H. Sagawa et al.
36
Reentrant of the pairing gap and α-correlation in 108Cd
K. Sugawara-Tanabe and K. Tanabe
37
α-correlation in 108Cd excitation energy spectrum of α removal from 112Sn
K. Sugawara-Tanabe et al.
38
Proof-of-principle calculations in the ab initio no-core Monte Carlo shell model
T. Abe et al.
39
Structure of few-alpha systems in cold neutron matter
H. Moriya, H. Tajima et al.
40
Second and fourth moments of the charge density and neutron-skin thickness of atomic nuclei
T. Naito et al.
41
Comment on “Breakdown of the tensor component in the Skyrme energy density functional”
H. Sagawa, G. Colò, and L. Cao
42
3. Nuclear Data  
Production of 93Zr sample in the 93Nb(n, p) reaction towards accurate determination of 93Zr half-life
A. Takamine et al.
43
EXFOR compilation of data from RIBF in 2021
T. Tada et al.
44
4. Hadron Physics  
Simulation study of the charged current DIS cross-section measurement at the EIC
S. Shimizu
45
Resolution studies for the ECCE EIC detector proposal
R. Seidl
46
Design of the zero degree calorimeter for the EIC
S. Shimizu et al.
47
Preparation for very-forward particle measurements in RHICf-II experiment
M. H. Kim
48
Measurement of J/ψ and ψ′ productions in p+d and p+p at SeaQuest
K. Nakano et al.
49
Transverse single spin asymmetries of forward neutrons in p + p, p + Al and p + Au collisions at sNN = 200 GeV as a function of transverse and longitudinal momenta
R. Seidl
50
Analysis of transverse single spin asymmetry for the forward neutron at the RHICf experiment
M. H. Kim
51
Status of the J-PARC E16 experiment in 2021
S. Yokkaichi
52
Analysis of Quark-Gluon plasma properties based on jets with ALICE experimental data
T. Kumaoka
53
Performance evaluation for sPHENIX-INTT ladder with a beta source
Y. Namimoto et al.
54
5. Hadron Physics (Theory)  
6. Particle Physics  
Search for an effective change of variable in QCD simulations
P. Boyle et al.
55
Radiative corrections to Landau levels of a single electron revisited
R. Yamazaki and M. Nio
56
Quarternion-spin-isospin model
Y. Akiba
57
7. Astrophysics and Astro-Glaciology  
Broad-band spectral analysis of the gamma-ray binary system LS 5039 and its strong MeV gamma-ray emission
H. Yoneda et al.
59
8. Accelerator  
Distributed control by EPICS for the SRILAC beam energy position monitoring system using LabVIEW
T. Watanabe et al.
61
Improvement of the transmission efficiency of RILAC
T. Nishi et al.
62
Development of FPGA-based machine protection system for RIBF
M. Komiyama et al.
63
Deployment of a beam interlock system driven by changes in magnet current (Curs-BIS) at the RI Beam Factory
K. Kumagai and A. Uchiyama
64
2021 Operational report for the Nishina RIBF water-cooling system
T. Maie et al.
65
Development of a new indicator for the auto tuning system with high-intensity primary beams
T. Nishi et al.
66
Status of vacuum pumping systems in accelerator facilities
Y. Watanabe et al.
67
9. Instrumentation  
Development of auto-focusing and auto-centering system for the BigRIPS separator (II)
Y. Shimizu et al.
69
Development of new ionization chamber specialized in high-Z beam
M. Yoshimoto et al.
70
Radiation transport calculation of BigRIPS separator
K. Yoshida
71
Present status of beam transport line from SRC to BigRIPS
K. Kusaka et al.
72
Development of novel semiconductor detector towards high-rate heavy RI beam counting
T. Isobe et al.
73
A pilot experiment for collective flow in heavy-ion collisions
S. Nishimura et al.
74
Silicon trackers for cluster knockout reactions in ONOKORO
K. Higuchi, J. Tanaka et al.
75
Development of the GAGG(Ce) calorimeter for the cluster knockout reaction measurement
R. Tsuji et al.
76
Development of a low-cost FPGA-Integrated TDC
H. Baba
77
Development of a high-bandwidth waveform processing system using RFSoC
S. Takeshige et al.
78
Compensation for energy-spread growth in RUNBA
M. Wakasugi et al.
79
Compensation for emittance growth in RUNBA
M. Wakasugi et al.
80
Simulation study to compensate for growth in energy spread and emittance in RUNBA
M. Wakasugi et al.
81
Improvements in the working environment for target handling at ERIS
T. Ohnishi et al.
82
Compact position-sensitive detector for in-ring diagnostics at the Rare-RI Ring
S. Naimi and G. Hudson-Chang
83
Extraction test of photo ionized Bi in PALIS gas cell
T. Sonoda et al.
84
Development of a timing detector for decay spectroscopy in conjunction with MRTOF-MS
M. Mukai et al.
85
New developments and progress of the ZD-MRTOF system in 2021
M. Rosenbusch et al.
86
Fifth report on offline tests for RF carpet transportation in RF ion guide gas cell at the SLOWRI facility
A. Takamine et al.
87
Development of β-TOF detector for decay-correlated mass measurement of β-decaying nuclides
T. Niwase et al.
88
Ion extraction from linear Paul trap via axially swinging field
K. Imamura et al.
89
Offline collinear laser spectroscopy of zirconium II
M. Tajima et al.
90
Fluorescence detection of the highly energetic radioactive Rb beams stopped in an optical cryostat at HIMAC
K. Tsubura et al.
91
Development of dispersion matching optics in OEDO beamline
S. Hanai et al.
92
Commissioning of the Si-CsI array TiNA for direct reactions at OEDO
B. Mauss et al.
93
First production of 6He beam at CRIB
H. Yamaguchi et al.
94
Long polarization-maintaining fiber link (440 m) for magneto-optical trapping of francium atoms
K. Nakamura et al.
95
RI nuclides produced in stacked Si and Al plates by 135-MeV/nucleon 12C beam
T. Kambara and A. Yoshida
96
Construction status of the INTT silicon tracker for sPHENIX at RHIC
I. Nakagawa et al.
97
Production of bus-extender for sPHENIX INTT detector
T. Hachiya et al.
98
Detection efficiency of the RHIC-sPHENIX-INTT detector
M. Morita et al.
99
Test beam experiment at ELPH in Tohoku University for sPHENIX INTT
G. Nukazuka et al.
100
Computing and network environment at the RIKEN Nishina Center
T. Ichihara et al.
102
CCJ operations in 2021
S. Yokkaichi et al.
103
   
Ⅲ. RESEARCH ACTIVITIES II (Material Science and Biology)  
1. Atomic and Solid State Physics (Ion)  
Crystal growth and β-NMR studies of the simplest copper oxide (CuO)
H. Yamazaki et al.
105
Single-event damages on SiC junction barrier Schottky diodes
M. Iwata et al.
106
Analysis of diffraction patterns of laser spots in dual-microbeams generated by glass capillary optics for future biological use
K. Inayoshi et al.
107
2. Atomic and Solid State Physics (Muon)  
μSR study on the low-temperature anomaly in triangular-lattice antiferromagnet CuOHCl
I. Yamauchi, X. G. Zheng, and I. Watanabe
109
Zero-field μSR measurements to investigate the magnetic ordering of Nd2Ru2O7
U. Widyaiswari et al.
110
Spin dynamics of Nd2Pt2O7 at 0.3 K observed by longitudinal-field μSR measurements
U. Widyaiswari et al.
111
Novel quantum spin liquid state in Ba3ZnRu2O9
Y. Yasui et al.
112
μ+SR Knight shift of the Mott insulator κ-(ET)4Hg2.78Cl8
D. P. Sari et al.
113
μSR study of the stabilization mechanism of antiferromagnetic state in molecular π-d system λ-(BEDT-STF)2FexGa1−xCl4
S. Fukuoka et al.
115
μSR study of Fe-substitution effects on ferromagnetic fluctuations in nonsuperconducting heavily overdoped Bi-2201 cuprates
T. Adachi et al.
116
Hole-doping effect on the magnetic correlation in the undoped(Ce-free) superconductor T’-La1.8Eu0.2CuO4 studied by μSR
T. Kawamata et al.
117
3. Radiochemistry and Nuclear Chemistry  
Isothermal gas chromatography study of Zr and Hf tetrachlorides using radiotracers of 88Zr and 175Hf—Towards investigation of gas-phase chemistry of Rf—
K. Shirai et al.
119
Online anion-exchange experiment of 89mZr in the Adogen 464/HNO3 system for the chemical research of Rf
E. Watanabe et al.
120
Solvent extraction of Zr and Hf in trioctylamine/H2SO4 system
T. Yokokita and H. Haba
122
Determination of 236U in a Th target irradiated with Li ions by ICP mass spectrometry
A. Nagai et al.
123
Development of a photon measurement apparatus for observing the radiative decay of 229mTh produced from 229Pa
Y. Shigekawa et al.
124
Surface ionization of protactinium toward implanting 229Pa into a CaF2 crystal
Y. Shigekawa and H. Haba
126
Development of RF carpet gas cell for extracting 229mTh ions
Y. Shigekawa et al.
127
Preparation of an 225Ac source for 221Fr EDM measurement
M. Sato et al.
129
Accelerator production and chemical separation of theranostic radionuclide 141Ce
K. Ooe et al.
130
Production of no-carrier-added Cr radiotracers in α-particle-induced reactions on Ti target
T. Yokokita and H. Haba
131
Production of 44Ti via the 45Sc(p, 2n)44Ti reaction for 44Ti/44gSc generator development
X. Yin et al.
133
HPLC elution behavior of heavy lanthanide metallofullerene: Ln@C82 (Tb, Dy, Ho, Er, Lu) on pyrenyl stationary phase
K. Akiyama et al.
134
Ionic liquid extraction of astatine for a nuclear medical utilization
Y. Nagai et al.
135
Synthesis of [211At]4-astato-L-phenylalanine by dihydroxyboryl-astatine substitution reaction in aqueous solution
Y. Shirakami et al.
136
Neopentyl glycol as a scaffold to provide radiohalogenated theranostic pairs of high in vivo stability
H. Suzuki et al.
137
Treatment for peritoneal dissemination of gastric cancer using 211At
S. Nomura and H. Haba et al.
138
Analysis of complex formation between rhenium and various hydrophilic ligands using HPLC and preparation of 186Re-carrying liposomes
I. O. Umeda et al.
139
Effect of tumor size on the therapeutic effect of 67Cu-labeled compounds targeting the somatostatin receptor
Y. Fujisawa et al.
141
Synthesis of 44mSc-DOTA-TATE for multiple-isotope PET imaging
T. Fukuchi et al.
142
Investigation of the usability of RIKEN 44mSc for radiolabeling on chelate-compounds
S. Oshikiri et al.
143
Progress of double-photon coincidence imaging with 28Mg
M. Uenomachi et al.
144
Source preparation technique of astatine-211 without electroplating for alpha spectroscopy
S. Fujino et al.
145
Production cross sections of 225Ac and 225Ra in the 232Th(14N, xnyp) reactions at 56, 79, and 98 MeV/nucleon
X. Yin et al.
147
Production cross sections of 28Mg via the α-particle-induced reaction on aluminum
M. Aikawa et al.
148
Production cross sections of titanium radionuclides via proton-induced reactions on scandiumm
M. Aikawa et al.
149
Production cross sections of 45Ti via deuteron-induced reaction on 45Sc
Ts. Zolbadral et al.
150
Production cross sections of 47Sc via proton-induced reactions on calcium
M. Aikawa et al.
151
Production cross sections of 47Sc via deuteron-induced reactions on natural calcium
M. Aikawa et al.
152
Activation cross sections of alpha-particle-induced reactions on natural calcium
M. Aikawa et al.
153
Activation cross sections of proton-induced reactions on manganese up to 30 MeV
H. Huang et al.
154
Activation cross sections of deuteron-induced reactions on natural chromium up to 24 MeV
H. Huang et al.
155
Production cross-sections of 52mMn in alpha-particle-induced reactions in natural vanadium
G. Damdinsuren et al.
156
Measurement of production cross sections of medical isotope 110mIn in alpha-particle-induced reaction on natural silver up to 50 MeV
Ts. Zolbadral et al.
157
Cross sections of alpha-particle-induced reactions on natSb
S. Takács et al.
158
Activation cross sections of deuteron-induced reactions on praseodymium up to 24 MeV
M. Aikawa
159
Production cross sections for α-particle-induced reactions on natLa
S. Ebata et al.
160
Production cross sections of 153Sm via alpha-particle-induced reactions on natural neodymium
M. Aikawa et al.
161
Production cross-sections of dysprosium-159 radioisotope obtained by α-particle-induced reactions of natural gadolinium up to 50 MeV
D. Ichinkhorloo et al.
162
Production cross-sections of holmium-161 radioisotope from alpha-particle-induced reaction on terbium-159 up to 29 MeV
D. Ichinkhorloo et al.
163
4. Radiation Chemistry and Biology  
Responsible gene analysis of phenotypic mutants revealed the linear energy transfer (LET)-dependent mutation spectrum in rice
R. Morita et al.
165
Genetic characterization of large flower mutant ohbana1 induced by heavy-ion beam irradiation in Arabidopsis thaliana
V. Q. Nhat et al.
166
40Ar17+ beam-induced mutants of the mycorrhizal mushroom Tricholoma matsutake defective in β-1,4 endoglucanase activity better promote the Pinus densiflora seedling growth in vitro than the wild-type strain
H. Murata et al.
167
Highly efficient and comprehensive identification of ethyl methanesulfonate-induced mutations in Nicotiana tabacum L. by whole-genome and whole-exome sequencing
H. Ichida et al.
168
Method of chromosome observation in the dioecious plant Silene latifolia
T. Kobayashi et al.
169
Producing high brix content of the sweet potato Anno-Beni by mutation induced using ion-beam irradiation
T. Hashiguchi et al.
170
Isolation method of marine red alga Agardhiella subulate
K. Tsuneizumi et al.
171
Survival rate of yeast cells in different storage media
Y. Nishimiya and H. Ichida
172
Effect of irradiation ions and doses on the survival rate of yeast
N. Lei et al.
173
Recruitment of Rad51 onto chromatin is suppressed by high dose heavy-ion irradiation in mammalian cells
M. Izumi and T. Abe
174
   
Ⅳ. OPERATION RECORDS  
Program advisory committee meetings for nuclear physics and for materials and life experiments
K. Yoneda et al.
175
Electric power consumption of RIKEN Nishina Center in 2021
M. Kidera et al.
176
Operation report on ring cyclotrons in the RIBF accelerator complex
T. Nakamura et al.
177
RILAC operation
T. Ohki et al.
178
Operation report on the RIKEN AVF cyclotron for 2021
S. Fukuzawa et al.
179
Present status of liquid-helium supply and recovery system
T. Dantsuka et al.
180
Impurity concentration in recovered helium gas of liquid-helium supply and recovery system
M. Nakamura et al.
181
Operation of the BigRIPS cryogenic plant
K. Kusaka et al.
182
Radiation safety management at RIBF
K. Tanaka et al.
183
Operation of Pelletron tandem accelerator
T. Ikeda et al.
185
Fee-based activities performed by the RI Application Research Group
A. Nambu et al.
186
   
Ⅴ. EVENTS  
International workshops on the extension project for the J-PARC hadron experimental facility (J-PARC HEF-ex WSs)
F. Sakuma
187
SPIN2021 international spin symposium
Y. Goto and T. Uesaka
188
Small-x physics in the electron-ion collider era
Y. Hatta et al.
189
RIKEN open day 2021
K. Tanaka et al.
190
   
Ⅵ. ORGANIZATION AND ACTIVITIES OF RIKEN NISHINA CENTER
     (Activities, Members, Publications & Presentations)
 
 Organization  
1. Organization Chart 191
2. Finances 192
3. Staffing 192
4. Research publication 193
5. Management 194
6. International Collaboration (as of March 31, 2022) 198
7. Awards 199
8. RIKEN Awards 200
9. Brief overview of the RI Beam Factory 201
Center Director 203
Laboratories  
Nuclear Science and Transmutation Research Division  
Radioactive Isotope Physics Laboratory 205
Spin isospin Laboratory 212
Nuclear Spectroscopy Laborarory 217
High Energy Astrophysics Laborarory 222
Nuclear Many-body Theory Laboratory 228
Superheavy Element Research Group 232
        Superheavy Element Production Team 233
        Superheavy Element Device Development Team 236
Astro-Glaciology Research Group 238
Nuclear Transmutation Data Research Group 241
        Fast RI Data Team 242
        Slow RI Data Team 243
        Muon Data Team 244
High-Intensity Accelerator R&D Group 247
        High-Gradient Cavity R&D Team 248
        High-Power Target R&D Team 249
Research Facility Development Division  
Accelerator Group 251
        Accelerator R&D Team 253
        Ion Source Team 254
        RILAC Team 255
        Cyclotron Team 257
        Beam Dynamics & Diagnostics Team 259
        Cryogenic Technology Team 261
        Infrastructure Management Team 262
Instrumentation Development Group 263
        SLOWRI Team 265
        Rare RI-ring Team 268
        SCRIT Team 270
Research Instruments Group 273
        BigRIPS Team 274
        SAMURAI Team 277
        Computing and Network Team 279
        Detector Team 281
Accelerator Applications Research Division  
Beam Mutagenesis Group 283
        Ion Beam Breeding Team 284
        Plant Genome Evolution Research Team 288
RI Application Research Group 290
        Nuclear Chemistry Research Team 291
        Industrial Application Research Team 298
Subnuclear System Research Division  
Quantum Hadron Physics Laboratory 299
Strangeness Nuclear Physics Laboratory 304
Radiation Laboratory 307
Meson Science Laboratory 312
RIKEN BNL Research Center 317
        Theory Group 319
        Experimental Group 323
        Computing Group 328
RIKEN Facility Off ce at RAL 333
Safety Management Group 337
User Liaison Group 339
        RIBF User Liaison Team 340
        Outreach Team 341
Office of the Center Director 342
Partner Institutions 345
Center for Nuclear Study, Graduate School of Science, The University of Tokyo 346
Wako Nuclear Science Center, IPNS (Institute of Particle and Nuclear Studies),
     KEK (High Energy Accelerator Research Organization)

354
   
Ⅶ. APPENDICES  
Symposia, Workshops & Seminars 357
Events 364
Press Releases 365
Preprints 366

BACK COVER