Activation, Radiation shielding materials

Sukegawa, Atsuhiko; Iida, Hiromasa*; Itoga, Toshio*; Okumura, Keisuke; Kai, Tetsuya; Konno, Chikara; Nakashima, Hiroshi; Nakamura, Takashi*; Ban, Shuichi*; Yashima, Hiroshi*; et al.

Hoshasen Shahei Handobukku; Kisohen, p.299 - 356, 2015/03

no abstracts in English

Measurement of lineal energy distribution of heavy ion using wall-less tissue equivalent proportional counter

Tsuda, Shuichi; Sato, Tatsuhiko; Takahashi, Fumiaki; Satoh, Daiki; Sasaki, Shinichi*; Namito, Yoshihito*; Iwase, Hiroshi*; Ban, Shuichi*; Takada, Masashi*

KEK Proceedings 2011-8, p.100 - 108, 2011/12

http://www-lib.kek.jp/cgi-bin/kiss_prepri.v8?KN=201125008exit=8.

Deposit energy distribution in microscopic site is basic information for understanding of biological effects of energetic heavy ion beams. To estimate RBE, lineal energy, y, can be an appropriate physical index. In this work, a wall-less tissue equivalent proportional counter has been designed and used for the measurement of y distributions, , for 160 MeV H, 150 MeV/u He and 490 MeV/u Si ion beams. Data of and the dose-means of , , were compared with those calculated by the microdosimetric function of PHITS. It is found that the calculated and agree fairly well with those measured, as well as the already reported result of 290 MeV/u carbon beam.

Measurement of microdosimetric spectra with a wall-less tissue-equivalent proportional counter for 290 MeV/u C beam

Tsuda, Shuichi; Sato, Tatsuhiko; Takahashi, Fumiaki; Satoh, Daiki; Endo, Akira; Sasaki, Shinichi*; Namito, Yoshihito*; Iwase, Hiroshi*; Ban, Shuichi*; Takada, Masashi*

Physics in Medicine & Biology, 55(17), p.5089 - 5101, 2010/09

https://doi.org/10.1088/0031-9155/55/17/013

The frequency distribution of the lineal energy of 290 MeV/u carbon beam was measured using a wall-less tissue equivalent proportional counter (wall-less TEPC) in a cylindrical volume with simulated diameter 0.72 m in verifying the accuracy of a dose calculation model. The measured lineal energy distribution as well as its dose-mean value agreed fairly well with the corresponding data from microdosimetric calculations using the PHITS code within the experimental uncertainty. It is found that a wall-less TEPC is needed to measure the precise energy deposition spectra of the delta rays produced secondarily by energetic heavy ion beams. The measured data also indicate that more than 11% of the energy escaped from the path of the trajectory of the carbon beam.

Angular distribution measurements of photo-neutron yields produced by 2.0 GeV electrons incident on thick targets

Lee, H.-S.*; Ban, Shuichi*; Sanami, Toshiya*; Takahashi, Kazutoshi*; Sato, Tatsuhiko; Shin, Kazuo*; Chung, C. W.*

Radiation Protection Dosimetry, 116(1-4), p.653 - 657, 2005/12

https://doi.org/10.1093/rpd/nci241

A study of differential photo-neutron yields by irradiation with 2 GeV electrons has been carried out. In this extension of a previous study in which measurements were made at an angle of 90 degrees. Relative to incident electrons, the differential photoneutron yield was obtained at two other angles, 48 and 140 degrees, to study its angular characteristics. Photo-neutron spectra were measured using a pulsed beam time-of-flight method and a BC418 plastic scintillator. The reliable range of neutron energy measurement was 8-250 MeV. The neutron spectra were measured for 10 Xo-thick Cu, Sn, W and Pb targets. The angular distribution characteristics, together with the previous results for 90, are presented in the study. The experimental results are compared with Monte Carlo calculation results. The yields predicted by MCNPX 2.5 tend to underestimate the measured ones. The same trend holds for the comparison results using the EGS4 and PICA3 codes.

Measurement of glass dosimeter response for low energy photon using synchrotron radiation

Asano, Yoshihiro; Sasamoto, Nobuo; Nakane, Yoshihiro; Nakashima, Hiroshi; Sakamoto, Yukio; Tanaka, Shunichi; Namito, Yoshihito*; Ban, Shuichi*; Hirayama, Hideo*; Nariyama, Nobuteru*

IRPA9: 1996 International Congress on Radiation Protection, Proceedings, p.4_253 - 4_255, 1996/00

no abstracts in English

Absorbed dose measurements and calculations in phantoms for 1.5 to 50keV photons

; Tanaka, Shunichi; Nakane, Yoshihiro; Namito, Yoshihito*; Hirayama, Hideo*; Ban, Shuichi*;

Health Physics, 68(2), p.253 - 260, 1995/02

https://doi.org/10.1097/00004032-199502000-00010

no abstracts in English

Benchmark problems for intermediate and high energy accelerator shielding

; Sakamoto, Yukio; Tanaka, Shunichi; ; Fukahori, Tokio; ; Sasamoto, Nobuo; Tanaka, Susumu; Nakamura, Takashi*; Shin, Kazuo*; et al.

JAERI-Data/Code 94-012, 90 Pages, 1994/09

JAERI-Data-Code-94-012.pdf:2.26MB

no abstracts in English

Development of a microcalorimeter for measuring absolute intensity of synchrotron radiation

; Tanaka, Shunichi; Yoshizawa, Michio; Hirayama, Hideo*; Ban, Shuichi*; Namito, Yoshihito*;

Nuclear Instruments and Methods in Physics Research A, 310, p.696 - 702, 1991/00

https://doi.org/10.1016/0168-9002(91)91121-B

no abstracts in English

Annotated bibliography and discussion of gamma-ray buildup fuctors

Tanaka, Shunichi; ; Hirayama, Hideo*; Ban, Shuichi*; Nakamura, Takashi*; Kosako, Toshiso*; ; ; ; Kawai, Masayoshi*; et al.

Applied Radiation and Isotopes, 39(2), p.241 - 252, 1988/00

https://doi.org/10.1016/0883-2889(88)90179-7

no abstracts in English

Measurement of lineal energy distributions by a wall-less tissue equivalent proportional counter using 400 MeV/u carbon beam

Tsuda, Shuichi; Sato, Tatsuhiko; Takahashi, Fumiaki; Satoh, Daiki; Endo, Akira; Sasaki, Shinichi*; Namito, Yoshihito*; Iwase, Hiroshi*; Ban, Shuichi*; Takada, Masashi*

no journal, , 

Knowledge of energy deposition at micrometer dimensions along heavy ion tracks is essential to understand the biological effects of radiation. Wall-less tissue equivalent proportional counter (TEPC) was produced for the purpose of measurement of lineal energy distribution of delta-rays. The measurement using the TEPC was performed at Heavy Ion Medical Accelerator at NIRS, Japan. It is found that lineal energy distributions could be measured for primary carbon beam with energy of 400MeV per nucleon and delta-rays. Detail of the experiment, energy calibration and estimation of delta-rays production will be presented.