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Abe, Shinichiro; Sato, Tatsuhiko
EPJ Web of Conferences, 122, p.04002_1 - 04002_6, 2016/06
Times Cited Count:0 Percentile:0.06(Physics, Nuclear)Nuclear transmutation has been investigated to reduce long-lived fission products (LLFPs) in high level radioactive wastes. However, the nuclear transmutation is difficult for some LLFPs (e.g., Sr, Sn and Cs) having small cross-sections of fission and neutron capture. Negative muon is examined to be applied for the nuclear transmutation. Low energy negative muon is captured on an atom, and then it can decay or be further captured on its nucleus. When negative muon is captured on nucleus, some light particles and residual nucleus are produced. Negative muon capture process has been implemented into latest version of PHITS. In this study, we studied the feasibility of nuclear transmutation by negative muon capture reaction for LLFPs using PHITS. Negative muon capture reaction on 90Sr is simulated. It is found that 94% of negative muons are captured on nucleus, and 66% of Sr become stable nuclides or radioactive nuclides having less than 20 days. It is also found that 15% of Sr become Rb having longer half-life than that of Sr.
Satoh, Daiki; Sato, Tatsuhiko; Endo, Akira; Matsufuji, Naruhiro*; Sato, Shinji*; Takada, Masashi*; Ishibashi, Kenji*
Nuclear Science Symposium Conference Record, 2005 IEEE, Vol.3, p.1288 - 1290, 2005/10
The response functions of a BC501A liquid organic scintillator have been measured for incidence of various charged particles to investigate the relationship between the kinetic energy of the charged particles and the light output of BC501A. The experiment was performed at Heavy-Ion Medical Accelerator in Chiba (HIMAC) utilizing spallation reactions by heavy ion bombardment on a graphite target. Charged particles incidental on BC501A were identified with the two-dimensional scatter plot of the time-of-flight and the light output. The light output of the BC501A scintillator was deduced as a function of the kinetic energy of the charged particles, and was compared with the semi-empirical formula. While the experimental data showed a good agreement with the formula for proton and deuteron, the data gave slightly larger values compared with the systematic trend for alpha particle.
Sato, Tatsuhiko; Satoh, Daiki; Endo, Akira; Yamaguchi, Yasuhiro
Journal of Nuclear Science and Technology, 42(9), p.768 - 778, 2005/09
Times Cited Count:17 Percentile:73.33(Nuclear Science & Technology)A new inventive radiation monitor, designated to DARWIN (Dose Assessment system applicable to various Radiations with WIde energy raNges), has been developed for monitoring doses at workspaces of high energy accelerator facilities and on ground. Characteristics of DARWIN were studied by both calculation and experiment. The calculated results indicate that DARWIN gives reasonable estimations of doses at most radiation fields. It was found from the experiment that DARWIN has an excellent property of measuring doses from all particles that significantly contribute to the background dose - photon, muon and neutron with wide energy ranges.
Satoh, Daiki; Sato, Tatsuhiko; Endo, Akira; Yamaguchi, Yasuhiro; Takada, Masashi*; Ishibashi, Kenji*
AIP Conference Proceedings 769, p.1680 - 1683, 2005/05
Response function of liquid organic scintillators is essential to derive the accurate neutron spectrum. Experimental data above 100 MeV, however, are very scarce. The existing Monte Carlo codes, SCINFUL and CECIL, are often used for estimation of the response function instead of the experimental data. These codes are known to reproduce well the response function for incidences below 100 MeV. Unfortunately, the codes are not applicable to the calculation in the higher energy region. In order to determine the response functions above 100 MeV, a new Monte Carlo code, designated as SCINFUL-QMD, has been developed. In the comparison with the experimental data up to 800 MeV, the validation of SCINFUL-QMD was confirmed. The results of SCINFUL-QMD agreed with the experimental data better than those of other calculation codes.
Satoh, Daiki; Sato, Tatsuhiko; Endo, Akira; Yamaguchi, Yasuhiro; Takada, Masashi*
NIRS-M-180, p.263 - 264, 2005/05
Response functions of NE213 liquid organic scintillator have been measured to develop a dose assessment method for high-energy neutrons. Spallation reactions by 800 MeV/u Si ions and 400 MeV/u C ions incident into thick carbon targets were utilized for the production of high-energy neutrons. Kinetic energies of neutrons were determined by the time-of-flight (TOF) method. -ray and charged particle events were eliminated from experimental data in off-line analysis. The measured response functions were used for validation of the simulation by the SCINFUL-QMD code, which is utilized for calculation of the G-function that converts the scintillator response to neutron dose. It was found from the results that SCINFUL-QMD has a good ability to reproduce the response functions.
Watanabe, Gentaro*; Maruyama, Toshiki; Sato, Katsuhiko*; Yasuoka, Kenji*; Ebisuzaki, Toshikazu*
Physical Review Letters, 94(3), p.031101_1 - 031101_4, 2005/01
Times Cited Count:93 Percentile:91.76(Physics, Multidisciplinary)no abstracts in English
Iwamoto, Osamu; Rong, J.; Fukahori, Tokio; Chiba, Satoshi
Journal of Nuclear Science and Technology, 39(Suppl.2), p.128 - 131, 2002/08
The nucleon induced fission cross section and the fragment distribution are calculated using the Quantum Molecular Dynamics (QMD) plus Statistical Decay Model (SDM) in the nucleon energy range 10 MeV to 10 GeV. The fission cross section is calculated for Au, Bi and U and compared with experiments. The calculation predicts fairly well the experimental values. The mass and charge distribution is calculated for Pb and Th at 1.6-GeV and 190-MeV proton incident energy, respectively.
Chikazumi, Shimpei*; Maruyama, Toshiki; Chiba, Satoshi; Niita, Koji*; Iwamoto, Akira
Physical Review C, 63(2), p.024602_1 - 024602_10, 2001/02
Times Cited Count:20 Percentile:73.75(Physics, Nuclear)no abstracts in English
Y.-O.Lee*; J.Chang*; Fukahori, Tokio; Chiba, Satoshi
Journal of Nuclear Science and Technology, 36(12), p.1125 - 1134, 1999/12
Times Cited Count:10 Percentile:60.71(Nuclear Science & Technology)no abstracts in English
Niita, Koji*; Maruyama, Toshiki; Nara, Yasushi; Chiba, Satoshi; Iwamoto, Akira
JAERI-Data/Code 99-042, p.73 - 0, 1999/09
no abstracts in English
*; *; *; *; *; *; Ogasawara, Shinobu*; Adachi, Masaaki*; Kume, Etsuo
JAERI-Data/Code 99-020, 168 Pages, 1999/03
no abstracts in English
Meigo, Shinichiro; Chiba, Satoshi; Shin, Kazuo*
Journal of Nuclear Science and Technology, 36(3), p.250 - 255, 1999/03
Times Cited Count:1 Percentile:13.15(Nuclear Science & Technology)no abstracts in English
Maruyama, Toshiki; Niita, Koji*; Oyamatsu, Kazuhiro*; Maruyama, Tomoyuki*; Chiba, Satoshi; Iwamoto, Akira
Nuclear Physics A, 654(3-4), p.908C - 911C, 1999/00
no abstracts in English
*; Kunugi, Tomoaki; *; Shibahara, Masahiko*
JAERI-Data/Code 98-007, 104 Pages, 1998/03
no abstracts in English
*; Kunugi, Tomoaki; Shibahara, Masahiko*; *
JAERI-Research 98-008, 25 Pages, 1998/02
no abstracts in English
Maruyama, Toshiki; Niita, Koji*; Oyamatsu, Kazuhiro*; Maruyama, Tomoyuki*; Iwamoto, Akira; Chiba, Satoshi
Physical Review C, 57(2), p.655 - 665, 1998/02
Times Cited Count:107 Percentile:97.04(Physics, Nuclear)no abstracts in English
Iwamoto, Akira; Niita, Koji*; Maruyama, Toshiki; Maruyama, Tomoyuki*
Progress of Theoretical Physics, 98(1), p.87 - 94, 1997/07
Times Cited Count:18 Percentile:72.46(Physics, Multidisciplinary)no abstracts in English
Maruyama, Tomoyuki*; Niita, Koji*
Progress of Theoretical Physics, 97(4), p.579 - 586, 1997/04
Times Cited Count:8 Percentile:57.26(Physics, Multidisciplinary)no abstracts in English
Iwamoto, Akira
Proc. of Int. Conf. on Nucl. Data for Science and Technol., 59, p.221 - 225, 1997/00
no abstracts in English
Chiba, Satoshi; Niita, Koji*;
Physical Review C, 54(6), p.3302 - 3304, 1996/12
Times Cited Count:12 Percentile:58.15(Physics, Nuclear)no abstracts in English