2010/01/13 by Jinbao He, He, J. J., Wang, H. W. +8
Decision Sciences · Medicine · Computer Science · #Scientific Computing and Data Management #Medical Imaging Techniques and Applications #Distributed and Parallel Computing Systems
paper · pdf · doi:10.48550/arxiv.1001.2053
The reaction rates of the key stellar reaction of 14O(α,p)17F have been reexamined. The previous conclusion, the 6.15-MeV state (Jπ=1-) dominating this reaction rate, has been overthrown by a careful reanalysis of the previous experimental data [J. Gómez del Campo \it et al., Phys. Rev. Lett. \bf 86, 43 (2001)]. According to the present R-matrix analysis, the previous 1- assignment for the 6.15-MeV state is definitely wrong. Most probably, the 6.286-MeV state is the 1- state and the 6.15-MeV state is a 3- one, and hence the resonance at Ex=6.286 MeV (Jπ=1-) dominates the reaction rates in the temperature region of astrophysical interests. The newly calculated reaction rates for the 14O(α,p)17F reaction are quite different from the previous ones, for instance, it's only about 1/6 of the previous value around 0.4 GK, while it's about 2.4 times larger than the previous value around 2 GK. The astrophysical implications have been discussed based on the present conclusions.