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.

Analyses of streamed neutron spectra at TIARA using DUCT-III

Masukawa, Fumihiro; Nakano, Hideo*; Nakashima, Hiroshi; Sasamoto, Nobuo; Tayama, Ryuichi*; Hayashi, Katsumi*; Shin, Kazuo*

Journal of Nuclear Science and Technology, 41(Suppl.4), p.46 - 49, 2004/03

http://www.tandfonline.com/doi/abs/10.1080/00223131.2004.10875641

A simple design code for duct-streaming radiations, DUCT-III was applied to the analyses of the streamed neutron spectra measured at TIARA labyrinth with two bends. The code satisfactorily reproduced the measured neutron energy spectra and the Monte Carlo calculations, except that every calculation overestimated the measured thermal components by factor of 2 or 3.

Shielding experiments and analyses on proton accelerator facility at TIARA

Nakashima, Hiroshi; Sakamoto, Yukio*; Tanaka, Shunichi; Tanaka, Susumu; Baba, Mamoru*; Nakamura, Takashi*; Hirayama, Hideo*; Shin, Kazuo*; JAERI-Universities Collaboration Working Group for Accelerator Shielding Study

Proceedings of 6th International Meeting on Nuclear Applications of Accelerator Technology (AccApp '03), p.959 - 968, 2003/00

In order to validate shielding design methods on proton accelerator facilities, a series of shielding experiments in several tens of MeV energy region were carried out at the Takasaki Ion Accelerators for Advanced Radiation Application (TIARA) of Japan Atomic Energy Research Institute (JAERI). The experiments include thick target neutron yield (TTY) measurements by charged particles, deep penetration experiments on concrete, steel and polyethylene shields using p-Li monoenergetic neutron source and radiation streaming experiment at a labyrinth of TIARA using p-Cu white neutron source. These experimental results are compared with calculation results with some high-energy particle transport codes such as MCNPX and NMTC/JAERI. The TTY measurements were analyzed by a code developed by Shin with a moving source model, and the streaming experiment was also analyzed by the DUCT-III code based on Shin's equation. This paper reviews the experimental results and the analyses on the results.

Experimental analyses on radiation streaming through a labyrinth in a proton accelerator facility of several tens MeV

Nakashima, Hiroshi; Masumura, Tomomi*; Tanaka, Susumu; Sakamoto, Yukio; Tanaka, Shunichi; Nakane, Yoshihiro; Meigo, Shinichiro; Nakamura, Takashi*; Kurosawa, Tadahiro*; Hirayama, Hideo*; et al.

Journal of Nuclear Science and Technology, 37(Suppl.1), p.197 - 201, 2000/03

https://doi.org/10.1080/00223131.2000.10874874

no abstracts in English

Analysis of neutron spectra from thick targets bombarded with 710-MeV particles by quantum molecular dynamics plus statistical decay model

Meigo, Shinichiro; Chiba, Satoshi; Shin, Kazuo*

Journal of Nuclear Science and Technology, 36(3), p.250 - 255, 1999/03

https://doi.org/10.3327/jnst.36.250

no abstracts in English

Experimental data on concrete shield transmission of quasi-monoenergetic neutrons generated by 43-and 68-MeV protons via the Li(p,n) reaction

Nakao, Noriaki*; Nakashima, Hiroshi; Sakamoto, Yukio; Nakane, Yoshihiro; Tanaka, Shunichi; ; Nakamura, Takashi*; Shin, Kazuo*;

JAERI-Data/Code 97-020, 46 Pages, 1997/06

JAERI-Data-Code-97-020.pdf:1.53MB

no abstracts in English

Measurement of radiation streaming in labyrinth; Measurement of radiation streaming in labyrinth at light ion room 2

Tanaka, Susumu; Nakashima, Hiroshi; Nakane, Yoshihiro; Sakamoto, Yukio; Meigo, Shinichiro; Tanaka, Shunichi; Takada, Masashi*; Kurosawa, Tadahiro*; Nakamura, Takashi*; Nakao, Noriaki*; et al.

Genshikaku Kenkyu, 41(3), p.101 - 112, 1996/06

no abstracts in English

Transmission through shields of quasi-monoenergetic neutrons generated by 43- and 68-MeV protons,II; Iron shielding experiment and analysis for investigating calculational method and cross-section data

; Nakao, Noriaki*; Tanaka, Shunichi; Nakamura, Takashi*; Shin, Kazuo*; Tanaka, Susumu; Takada, Hiroshi; Meigo, Shinichiro; Nakane, Yoshihiro; Sakamoto, Yukio; et al.

Nuclear Science and Engineering, 124(2), p.243 - 257, 1996/00

https://doi.org/10.13182/NSE96-A28575

no abstracts in English

Shielding experiments with quasi-monoenergetic neutrons between 15 and 90 MeV at 90 MV AVF cyclotron facility TIARA

Sakamoto, Yukio; ; Nakane, Yoshihiro; Tanaka, Shunichi; Tanaka, Susumu; Nakamura, Takashi*; Baba, Mamoru*; ; Shin, Kazuo*

Proc. of the 8th Int. Conf. on Radiation Shielding, 0, p.809 - 815, 1994/00

no abstracts in English

Research plan of radiation shielding for accelerator facility and monoenergetic neutron source

Tanaka, Susumu; Nakamura, Takashi*; Baba, Mamoru*; Imamura, Mineo*; Hirayama, Hideo*; Shin, Kazuo*; Tanaka, Shunichi; Tanaka, Ryuichi

Proc. of 2nd Int. Symp. on Advanced Nuclear Energy Research,Evolution by Accelerators, p.342 - 344, 1990/00

no abstracts in English