报告题目：Photoneutron Reaction Data for Nuclear Physics and Astrophysics

报 告 人：Hiroaki Utsunomiya (Department of Physics, Konan University, Japan)

报告时间：2017年9月20日（星期三）上午9：30-11：00

报告地点：嘉定园区学术活动中心302房间

报告简介：

We present photoneutron reaction data in terms of the g-ray strength function (gSF) and partial GDR cross sections in conjunction with the photonuclear data project, IAEA-CRP F41032. The (g,n) and (n,g) cross sections are interconnected through theg-ray strength function (gSF) based on the Brink hypothesis of the approximate equality of the upward and downward gSFs. One can apply the gSF method to isotopic chains to deduce (n,g) cross sections for radioactive nuclei on the one hand and use the (g,n) cross section as an absolute normalization to the gSF below neutron threshold on the other. We also contribute to resolving the long-standing discrepancy between the Livermore and Saclay data of partial GDR cross sections by providing new experimental data with a novel methodology of direct neutron-multiplicity sorting.

报告人简介：

Hiriaki Utsunomiya，日本甲南大学物理科学与工程系教授（Faculty of Science and Engineering Department of Physics），主要研究方向宇宙元素的起源，星系核合成，光核反应，核数据等(origin of elements, nucleosynthesis in stars and in the early universe, photonuclear reactions, nuclear data)。