JAEA-Conf 2011-002 - 日本原子力研究開発機構

JAEA-Conf 2011-002
11. Experimental studies of light fragment production cross section
for nucleon induced reaction at intermediate energies
Toshiya SANAMI 1 , Masayuki HAGIWARA 1 , Hiroshi IWASE 1 , Masashi TAKADA 2 ,
Daiki SATOH 3 , Hiroshi YASHIMA 4 , Tsuyoshi KAJIMOTO 5 , Yosuke IWAMOTO 3 ,
So KAMADA 2 , Yoshihiro NAKANE 3 , Satoshi KUNIEDA 3 , Atsushi TAMII 6 , Kichiji HATANAKA 6
1 Applied Physics Laboratory, High Energy Accelerator Research Organization
2 National Institute of Radiological Sciences
3 Japan Atomic Energy Agency
4 Kyoto University Research Reactor Institute
5 Kyushu University
6 Research Center for Nuclear Physics, Osaka University
Email: toshiya.sanami@kek.jp
Energy, angular double differential cross section (DDX) data for fragment production from
intermediate energy proton induced reactions were measured using a Bragg Curve Counter (BCC) for light
to medium mass target nuclei. Systematic experimental data have been obtained for C, N, O, Al, Ti and Cu
targets, incident energies from 40 to 300 MeV, fragments from Li to O with energies down to 0.5 MeV/u, at
30,60,90,120 laboratory angles. Typical examples of results are presented for the Al(p,x) reaction at 200
MeV, 30,60,90,120 and the C(p,xLi) at 40-200 MeV at 30.
1. Introduction
Energy and angular double differential cross section (DDX) for nucleon-induced charged-particle
production reactions are of importance to estimate radiation effects, energy deposition and radionuclide
production. For this reason, the DDX of light charged particle (hydrogen and helium isotopes) production
have been studied experimentally and theoretically. In addition to light charged particles, nucleon-induced
reactions produce fragments (charged particle heavier than helium) in intermediate energy. Since the
fragments have large liner energy transfer (LET), considerable amount of energy can be deposited in a m
region even by a single nucleon. The energy deposition causes anomalous effect on materials irradiated by
intermediate energy radiation. According to recent studies, for instance, fragment productions show large
contribution for irradiation effects of nucleon incidence on micro-electric devices [1]. Thus, precise data of
fragment production are required for nucleon induced reaction in particular for tens of MeV and hundreds