2021年春の年会

講演情報

一般セッション

II. 放射線工学と加速器・ビーム科学および医学利用 » 201-1 原子核物理,核データ測定・評価・検証,核反応工学

[3E05-08] 核データ測定2

2021年3月19日(金) 10:45 〜 12:00 E会場 (Zoomルーム5)

座長:明午 伸一郎 (JAEA)

11:30 〜 11:45

[3E08] Photon energy dependence of photo-neutron production from the 197Au(g,xn) reaction

*Tuyet Kim Tran1, Toshiya Sanami1,2, Hirohito Yamazaki1,2, Toshiro Itoga3, Yasuhito Sakaki2, Linh Thi Truc Nguyen4, Yoichi Kirihara5, Hiroshi Nakashima6, Shuji Miyamoto7, Yoshihiro Asano2 (1. SOKENDAI/KEK, 2. High Energy Accelerator Research Organization (KEK), 3. Japan Synchrotron Radiation Research Institute (JASRI), 4. University of Science, VNU-HCM, Vietnam, Nuclear Technique Laboratory , 5. Japan Atomic Energy Agency (JAEA) , 6. Hokkaido University, 7. University of Hyogo)

キーワード:photo-neutron, photon energy dependence, polarized photon, double differential cross section

The neutron energy spectrum of 197Au(g,n) for 16.6 MeV polarized photon was studied by Kirihara et al. We observed the evaporation and direct components in the neutron energy spectrum. However, the dependence of these components on the energy of the incident photon was not studied. To understand the photon energy dependence, we took the experimental data of double differential cross-section (DDX) of photo-neutrons with different mono-energies of the incident polarized photons. In this work, the laser Compton scattering (LCS) photons at the energies of 14 MeV, 17 MeV, and 20 MeV were produced in the NewSUBARU-BL01 facility. The LCS photons were collimated into a cylindrical gold target (1cm x 1cm). The photo-neutrons were detected by a cylindrical detector (12.7cm x 12.7cm) filled with liquid organic scintillator NE213. The pulse shape discrimination method was applied to distinguish neutron from gamma events. The neutron energy was determined using time of flight methods. The experimental DDX results for the energies show the two components. The details of the photon energy dependence of the photo-neutron production will be discussed in this presentation.