Radiative neutron capture reaction rates for r-process nucleosynthesis
Abstract
About half of the elements beyond iron are synthesized in stars by rapid-neutron capture process (r-process). The stellar environment provides very high neutron flux in a short time ( seconds) which is conducive for the creation of progressively neutron-rich nuclei till the waiting point is reached after which no further neutron capture reactions proceed. At this point such extremely neutron-rich nuclei become stable via decay. A detailed understanding of the r-process remains illusive. In the present work, we explore the radiative neutron-capture (n,) cross sections and reaction rates around the r-process peak near mass number eighty. The inherent uncertainties remain large in some cases, particularly in case of neutron-rich nuclei. When the low-energy enhancement exists, it results in significant increase in the reaction rate for neutron-capture.
Cite
@article{arxiv.2206.15022,
title = {Radiative neutron capture reaction rates for r-process nucleosynthesis},
author = {Vinay Singh and Joydev Lahiri and Malay Kanti Dey and D. N. Basu},
journal= {arXiv preprint arXiv:2206.15022},
year = {2023}
}
Comments
12 pages including 21 figures. arXiv admin note: text overlap with arXiv:1907.08054