Systematic studies of nuclear total reaction cross sections and related topics

Wednesday 29 May 2013, 11:00 → 12:00 Asia/Tokyo

Room 203, RIBF building (RIKEN Wako)

This is an announcement for the next joint group seminar of Astrophysical Big Bang Laboratory and Theoretical Nuclear Physics Laboratory on May 29th (Wed). There will be three 15+10 min. introductory talks by Dr. Akihisa Kohama, Dr. Alexey Tolstov, and Dr. Hirotaka Ito, respectively. Speaker: Dr. Akihisa Kohama (Theoretical Nuclear Physics Laboratory) Abstract: The total reaction cross section (\sigma_R) of nuclei is one of the most fundamental observables that characterize the geometrical size of nuclei. The empirical data of \sigma_R offer the information on fundamental quantities, such as nuclear structure, nuclear matter equation of state, etc. In this talk, I will introduce our black-sphere approximation of nuclei, which is suitable for systematic analyses of those data for wide range of nuclei on the same footing. Title: Radiative transfer at supernova shocks Speaker: Dr. Alexey Tolstov (Astrophysical Big Bang Laboratory) Abstract: The phenomenon of a supernova in most cases should start with a bright flash, caused by a shock wave emerging on the surface of the star after the phase of collapse or thermonuclear explosion in interiors. The detection of such outbursts associated with the supernova shock breakout can be used to obtain information about the explosion properties and presupernova parameters. We present the results and current status of numerical simulation of shock waves in several models of supernovae taking into account multigroup radiative transfer and a number of relativistic effects. Title: Photospheric emission from stratified jets Speaker: Dr. Hirotaka Ito (Astrophysical Big Bang Laboratory) Abstract: Gamma-ray Bursts (GRBs) are the most powerful explosion in the Universe. Since their discovery nearly 40 years ago, the emission mechanism of GRBs is still among the greatest puzzles of modern astrophysics. In this talk, first I will give a brief review of the theoretical models for the emission mechanism. Then I will introduce my current research on this topic. Other TNP seminars