Statistics – Computation
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.108..221k&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 108, no. 2, Jan. 1985, p. 221-226. Research supported by the University Gr
Statistics
Computation
1
Helium Plasma, Plasma Density, Reaction Kinetics, Stellar Physics, Thermonuclear Reactions, White Dwarf Stars, Computational Astrophysics, Pair Production, Plasma Temperature, Stellar Evolution, Stellar Interiors
Scientific paper
The plots of dimensionless parameters for helium plasma are given, as they are of great importance for the study of physical conditions prevalent in stellar interiors consuming helium. The relevant temperature and density leading to weak and strong screening can be obtained from the plots to compute the ability of screening to enhance the thermonuclear reaction rates. To make a realistic approach, the pycnonuclear triple-alpha reaction rates are found for the 7.66 (O+) MeV level for pair creation. The equation used here is suitable for white dwarfs satisfying 3 Gamma/tau greater than zero and much less than 1. The rates are enhanced approximately 10 to the 42nd times, which indicates that the mean life will be reduced by the same factor. The extent of the pycnonuclear regime is shown in a diagram.
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