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Title: Effects of a new 3-alpha reaction on the s-process in massive stars

Abstract

Effect of a new 3-alpha reaction rate on the s-process during the evolution of a massive star of 25 solar mass is investigated for the first time, because the s-process in massive stars have been believed to be established with only minor change. We find that the s-process with use of the new rate during the core helium burning is very inefficient compared to the case with the previous 3-alpha rate. However, the difference of the overproduction is found to be largely compensated by the subsequent carbon burning. Since the s-process in massive stars has been attributed so far to the neutron irradiation during core helium burning, our finding reveals for the first time the importance of the carbon burning for the s-process during the evolution of massive stars.

Authors:
; ; ; ;  [1];  [2];  [2];  [2]
  1. Department of physics, Kyushu University, Fukuoka 812-8581 (Japan)
  2. (Japan)
Publication Date:
OSTI Identifier:
22075774
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1484; Journal Issue: 1; Conference: Conference on origin of matter and evolution of galaxies 2011, Wako (Japan), 14-17 Nov 2011; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ALPHA REACTIONS; ASTROPHYSICS; CARBON BURNING; HELIUM BURNING; IRRADIATION; MASS; NEUTRONS; NUCLEOSYNTHESIS; S PROCESS; STARS

Citation Formats

Kikuch, Yukihiro, Ono, Masaomi, Matsuo, Yasuhide, Hashimoto, Masa-aki, Fujimoto, Shin-ichiro, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Department of physics, Kyushu University, Fukuoka 812-8581, and Kumamoto National College of Technology, Kumamoto 861-1102. Effects of a new 3-alpha reaction on the s-process in massive stars. United States: N. p., 2012. Web. doi:10.1063/1.4763428.
Kikuch, Yukihiro, Ono, Masaomi, Matsuo, Yasuhide, Hashimoto, Masa-aki, Fujimoto, Shin-ichiro, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Department of physics, Kyushu University, Fukuoka 812-8581, & Kumamoto National College of Technology, Kumamoto 861-1102. Effects of a new 3-alpha reaction on the s-process in massive stars. United States. doi:10.1063/1.4763428.
Kikuch, Yukihiro, Ono, Masaomi, Matsuo, Yasuhide, Hashimoto, Masa-aki, Fujimoto, Shin-ichiro, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Department of physics, Kyushu University, Fukuoka 812-8581, and Kumamoto National College of Technology, Kumamoto 861-1102. Mon . "Effects of a new 3-alpha reaction on the s-process in massive stars". United States. doi:10.1063/1.4763428.
@article{osti_22075774,
title = {Effects of a new 3-alpha reaction on the s-process in massive stars},
author = {Kikuch, Yukihiro and Ono, Masaomi and Matsuo, Yasuhide and Hashimoto, Masa-aki and Fujimoto, Shin-ichiro and Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 and Department of physics, Kyushu University, Fukuoka 812-8581 and Kumamoto National College of Technology, Kumamoto 861-1102},
abstractNote = {Effect of a new 3-alpha reaction rate on the s-process during the evolution of a massive star of 25 solar mass is investigated for the first time, because the s-process in massive stars have been believed to be established with only minor change. We find that the s-process with use of the new rate during the core helium burning is very inefficient compared to the case with the previous 3-alpha rate. However, the difference of the overproduction is found to be largely compensated by the subsequent carbon burning. Since the s-process in massive stars has been attributed so far to the neutron irradiation during core helium burning, our finding reveals for the first time the importance of the carbon burning for the s-process during the evolution of massive stars.},
doi = {10.1063/1.4763428},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1484,
place = {United States},
year = {2012},
month = {11}
}