New Astrophysical Reaction Rates for 18F(p, α)15O and 18F(p, γ)19Ne
SHU Neng-Chuan1,2, D. W. Bardayan2, J. C. Blackmon2, CHEN Yong-Shou1, R. L. Kozub3, P. D. Parker4, M. S. Smith2
1China Institute of Atomic Energy, Beijing 102413
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
2Physics Department, Tennessee Technological University, Cookeville, Tennessee 38505, USA
3A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USA
New Astrophysical Reaction Rates for 18F(p, α)15O and 18F(p, γ)19Ne
SHU Neng-Chuan1,2; D. W. Bardayan2;J. C. Blackmon2;CHEN Yong-Shou1;R. L. Kozub3;P. D. Parker4;M. S. Smith2
1China Institute of Atomic Energy, Beijing 102413
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
2Physics Department, Tennessee Technological University, Cookeville, Tennessee 38505, USA
3A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USA
Abstract： The rates of the thermonuclear 18F(p, α)15O and 18F(p, γ)19Ne reactions in hot astrophysical environments are needed to understand gamma-ray emission from nova explosions. The rates for these reactions have been uncertain due to discrepancies in recent measurements, as well as to a lack of a comprehensive examination of the available structure information in the compound nucleus 19Ne. We have examined the latest experimental measurements with radioactive and stable beams, and made estimates of the unmeasured 19Ne nuclear level parameters, to generate new rates with uncertainties for these reactions. The rates are expressed as numerical values over the temperature range relevant for stellar explosions, as well as analytical expressions as functions of temperature in a format suitable for use in astrophysical simulations. Comparisons with the previous rate calculations are carried out, and the astrophysical implications are briefly discussed.
SHU Neng-Chuan; D. W. Bardayan;J. C. Blackmon;CHEN Yong-Shou;R. L. Kozub;P. D. Parker;M. S. Smith. New Astrophysical Reaction Rates for 18F(p, α)15O and 18F(p, γ)19Ne[J]. 中国物理快报, 2003, 20(9): 1470-1473.
SHU Neng-Chuan, D. W. Bardayan, J. C. Blackmon, CHEN Yong-Shou, R. L. Kozub, P. D. Parker, M. S. Smith. New Astrophysical Reaction Rates for 18F(p, α)15O and 18F(p, γ)19Ne. Chin. Phys. Lett., 2003, 20(9): 1470-1473.
CHEN Jin-Gen;CAI Xiang-Zhou;ZHANG Hu-Yong;SHEN Wen-Qing;REN Zhong-Zhou;JIANG Wei-Zhou;MA Yu-Gang;ZHONG Chen;WEI Yi-Bin;GUO Wei;ZHOU Xing-Fei;MA Guo-Liang;WANG Kun. Proton Halo or Skin in the Excited States of Light Nuclei[J]. 中国物理快报, 2003, 20(7): 1021-1024.
2003, Vol. 20 
