Nuclear electron capture rate in stellar interiors and the case of 7Be

Details Nuclear electron capture rate in stellar interiors and the case of 7Be Nuclear electron capture rate in stellar interiors and the case of 7Be

2008-11-25

arxiv.org/abs/0811.4053v1

J.Phys.G36:025203,2009

Physics

Nuclear Physics

Nuclear Theory

8 pages, 1 figure, IOP macro style, submitted to JPG

Scientific paper

10.1088/0954-3899/36/2/025203

Nuclear electron capture rate from continuum in an astrophysical plasma environment (like solar core) is calculated using a modified Debye-Huckel screening potential and the related non-Gaussian q-distribution of electron momenta. For q=1 the well-known Debye-Huckel results are recovered. The value of q can be derived from the fluctuation of number of particles and temperature inside the Debye sphere. For 7Be continuum electron capture in solar core, we find an increase of 7 -- 10 percent over the rate calculated with standard Debye-Huckel potential. The consequence of this results is a reduction of the same percentage of the SSM 8B solar neutrino flux, leaving unchanged the SSM 7Be flux.

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