[3N01-04] 光核反応

[3N02] Photon energy dependence of photoneutron production from ^natCu(g,xn) and ^natTi(g,xn) reactions

*Tuyet Kim Tran¹, Toshiya Sanami¹, Hirohito Yamazaki¹, Toshiro Itoga², Linh Thi Truc Nguyen³, Yasuhito Sakaki¹, Yoichi Kirihara⁴, Hiroshi Nakashima⁵, Shuji Miyamoto⁶, Yoshihiro Asano¹ (1. High Energy Accelerator Research Organization (KEK)/ SOKENDAI, 2. Japan Synchrotron Radiation Research Institute (JASRI), 3. Vietnam University - Ho Chi Minh City University of Science , 4. Japan Atomic Energy Agency (JAEA), 5. Hokkaido University, 6. Osaka University )

キーワード：double differential cross section, photonuclear reaction, photoneutrons, polarized photon

The photoneutron spectra of Cu(g,xn) and Ti(g,xn) at 16.6 MeV polarized photon was studied by our group. We figured out the experimental spectra of both targets including two components: (i) an low-energy component which followed a Maxwellian distribution, (ii) a high-energy component. Photon energy dependence of photoneutron production on Cu and Ti natural targets have not been studied. Thus, we performed measurement of double differential cross-section (DDX) of photoneutron using Laser Compton Scattering (LCS) photon energies at 17 MeV and 20 MeV at NewSUBARU-BL01 facility, Hyogo. The Cu and Ti targets were prepared in cylindrical shape placed in the trajectory of the high energy photon beam. The neutrons produced via photonuclear reaction were detected by liquid scintillator NE213 detector. We applied pulse shape discrimination to remove gamma background and time of flight technique to measure neutron energy. The neutron yields in low-energy and high-energy components both increased at higher energy photon beam. The details in this work will be discussed in the presentation.