1 research outputs found
Nuclear electron capture rate in stellar interiors and the case of 7Be
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.Comment: 8 pages, 1 figure, IOP macro style, submitted to JP