Theoretical study on dynamics of 12C synthesis through radiative capture reactions of three alpha-particles

2014 Fiscal Year Final Research Report

• Project/Area Number: 24540261
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Niigata University
• Principal Investigator: SUZUKI YASUYUKI 新潟大学, 自然科学系, フェロー (70018670)
• Co-Investigator(Renkei-kenkyūsha): HORIUCHI Wataru 北海道大学, 理学(系)研究科(研究院), 助教 (00612186) ; AOYAMA Shigeyoshi 新潟大学, 学術情報基盤機構情報基盤センター, 准教授 (60311528) ; ARAI Kouji 長岡工業高等専門学校, 准教授 (20374738)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: Triple-alpha reactions / Hoyle resonance / Hyperspherical method / Adiabatic potential / 複素吸収ポテンシャル

Outline of Final Research Achievements

The process for synthesizing 12C through radiative capture reactions of three alpha-particles proceeds dominantly via two steps, a formation of 8Be resonance and a subsequent capture of an alpha-particle by emitting gamma rays. An experimental determination of the reaction rate is hopeless, so that a theoretically reliable calculation is needed. Using the hyperspherical coordinate we have developed a description of continuum states of three charged particles and have for the first time succeeded in obtaining the energy and width of the Hoyle resonance that plays a key role for the triple-alpha recations. This result warrants the possibility of calculating the reaction rate accurately. A calculation for reacing our goal is in progress.

Free Research Field

原子核理論