Photodisintegration of 80Se^{80}Se as a probe of neutron capture for the s-process branch-point nucleus 79Se^{79}Se

Photoneutron cross sections were measured for 80Se near the neutron separation energy with the laser Compton scattering γ rays. The stellar neutron capture rate for 79Se was evaluated by using the photodisintegration data as constraints on the E1 γ strength function within the framework of the Hauser-Feshbach statistical model. The result is compared with the model calculation of Bao and Käppeler. © Copyright owned by the author(s).SCOPUS: cp.pinfo:eu-repo/semantics/publishe

Measurement of total gamma absorption for high energy gamma rays

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

High resolution spectroscopy of the giant resonance in the 16O(γ,abs) reaction

The characteristics of the nuclear photo-absorption spectroscopy using the laser Compton scattering (LCS) photons and the high-resolution high-energy photon spectrometer (HHS) are presented in this paper. The maximum energy of a LCS photon was increased up to 30 MeV, and the response functions of the HHS were improved. By taking advantage of these achievements, the 16O(γ,abs) cross section was measured in the giant resonance region, that is, 20 to 25MeV. The preliminary result with the energy resolution of about 0.1% is presented and compared with the preceding data

M1 γ strength for zirconium nuclei in the photoneutron channel

SCOPUS: ar.jinfo:eu-repo/semantics/publishe