2011/06/30 by Abhishek Mishra, D. N. Basu · 1 citation
Physics and Astronomy · #nucl-th #astro-ph.CO #nucl-ex
published as Rom.J.Phys.57:1317-1327,2012 · 6 pages including 5 figures and 2 tables; Accepted for presentation at DAE Symposium on Nuclear Physics, December 26-30, 2011, Department of Nuclear Physics, Andhra University, Visakhapatnam, A.P., India
arxiv created 2011/11/15 · arxiv updated 2014/06/03
The theoretical predictions of the primordial abundances of elements in the big-bang nucleosynthesis (BBN) are dominated by uncertainties in the input nuclear reaction rates. We investigate the effect of modifying these reaction rates on light element abundance yields in BBN by replacing the thirty-five reaction rates out of the existing eighty-eight. We have studied these yields as functions of evolution time or temperature. We find that using these new reaction rates results in only a little increase in helium mass fraction over that obtained previously in BBN calculations. This allows insights into the role of the nuclear reaction rates in the setting of the neutron-to-proton ratio during the BBN epoch. We observe that even with considerable nuclear physics uncertainties, most of these nuclear reactions have minimal effect on the standard BBN abundance yields of 6Li and 7Li.