Neutrino-nucleus and electron capture reactions in nucleosynthesis processes

2014 Fiscal Year Final Research Report

• Project/Area Number: 22540290
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Nihon University
• Principal Investigator: SUZUKI Toshio 日本大学, 文理学部, 教授 (70139070)
• Co-Investigator(Kenkyū-buntansha): HONMA Michio 会津大学, コンピュータ理工学部, 教授 (40264569)
• Co-Investigator(Renkei-kenkyūsha): YOSHIDA Takashi 京都大学, 基礎物理学研究所, 特任助教 (80374891)
• Project Period (FY): 2010-04-01 – 2015-03-31
• Keywords: 電子捕獲反応 / ニュートリノ-原子核反応 / 元素合成 / 殻模型 / ベータ崩壊 / スピンモード / 核URCA過程

Outline of Final Research Achievements

Accurate evaluations of neutrino-nucleus reaction cross sections, electron capture and beta-decay rates at stellar environments of high densities and temperatures are carried out with the use of new shell-model Hamiltonians which can describe spin modes of nuclei quite successfully. New weak data are applied to studies of nucleosynthesis and evolution of stars. Importance and relevance of accurate evaluations of the rates are demonstrated in nucleosynthesis in supernova explosions (SNe) such as r-process nucleosynthesis in type II SNe and synthesis of neutron-rich isotopes in type Ia SNe as well as in nuclear URCA processes.

Free Research Field

理論核物理