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Changes in r-process abundances at late times | | R. Surman
; J. Engel
; | | Date: |
19 Mar 2001 | | Journal: | Phys.Rev. C64 (2001) 035801 | | Subject: | nucl-th | | Abstract: | We explore changes in abundance patterns that occur late in the r process. As the neutrons available for capture begin to disappear, a quasiequilibrium funnel shifts material into the large peaks at A=130 and A=195, and into the rare-earth "bump" at A=160. A bit later, after the free-neutron abundance has dropped and beta-decay has begun to compete seriously with neutron capture, the peaks can widen. The degree of widening depends largely on neutron-capture rates near closed neutron shells and relatively close to stability. We identify particular nuclei the capture rates of which should be examined experimentally, perhaps at a radioactive beam facility. | | Source: | arXiv, nucl-th/0103049 | | Services: | Forum | Review | PDF | Favorites | |
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