Reaction Rates of neutron capture by Li- and Be-isotopes

Details Reaction Rates of neutron capture by Li- and Be-isotopes Reaction Rates of neutron capture by Li- and Be-isotopes

1996-09-19

arxiv.org/abs/nucl-th/9609041v1

Physics

Nuclear Physics

Nuclear Theory

8 pages (uses sprocl.sty), no figures, Proc. Int. Conf. "International Workshop on Physics of Unstable Nuclear Beams", Univers

Scientific paper

Neutron capture by neutron-rich Li- and Be-isotopes plays a role in big--bang nucleosynthesis, especially in its inhomogeneous version and in the $\alpha$--process occurring in supernovae. New reaction rates for $^{7,8}$Li(n,$\gamma$)$^{8,9}$Li and $^{9,10,11}$Be(n,$\gamma$)$^{10,11,12}$Be have been consistently calculated using direct capture for the nonresonant part and the Breit-Wigner formula for the resonant part. The spectroscopic factors, spin/parity assignments and excitation energies of the final bound and initial resonant states have been taken from existing experimental data whenever possible. For unstable nuclei where this information is not experimentally available the shell model was used to determine these quantities.

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