Measurement of total gamma absorption for high energy gamma raysF. Kitatani1, H. Harada1, K.Y. Hara1, 2, H. Utsunomiya3, S. Goko3, T. Kaihori3, 4 and H. Toyokawa4
1 Japan Atomic Energy Agency, Ibaraki 319-1195, Japan
2 University of Tsukuba, Tsukuba 305-8577, Japan
3 Konan University, Kobe 658-8501, Japan
4 National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8551, Japan
Published online: 21 May 2008
Total gamma absorption cross sections are the most important data used in various fields related to the application of gamma rays. However, the measurements of the total gamma absorption cross section were difficult for high energy gamma rays since there were no suitable gamma ray sources. Recently, the nuclear photo-absorption measurement system using the laser-Compton backscattering (LCS) gamma rays and the high-resolution high-energy photon spectrometer (HHS) were developed. We have utilized the system to measure the total gamma absorption cross section, that is, the sum of the atomic and nuclear interactions. The total gamma absorption cross sections at 10 MeV for Al and Cu have been measured with the system. The preliminary results show that the obtained values agree fairly with the theoretical ones.
© CEA 2008