The role of fission in the r-process

被引：65

作者：

Martinez-Pinedo, G. ^{[1
]}

Mocelj, D. ^{[1
]}

Zinner, N. T. ^{[1
]}

Kelic, A. ^{[1
]}

Langanke, K. ^{[1
]}

Panov, I. ^{[1
]}

Pfeiffer, B. ^{[1
]}

Rauscher, T. ^{[1
]}

Schmidt, K.-H. ^{[1
]}

Thielemann, F.-K. ^{[1
]}

机构：

[1] Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany

来源：

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS VOL 59, NO 1 | 2007年 / 59卷 / 01期

关键词：

r-process nucleosynthesis; nuclei far from stability; fission;

D O I：

10.1016/j.ppnp.2007.01.018

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have developed a full set of fission rates that include spontaneous fission, neutron-induced fission, beta-delayed fission and, neutrino-induced fission, that are supplemented with realistic distributions of fission yields. Using this new input data we have carried out r-process calculations assuming adiabatic expansions that mimic the conditions achieved in the supernova neutrino driven wind. We have explored the sensitivity of the final abundances to different mass models. The resulting abundance distribution turns out to be very sensitive to the strength of the N = 82 shell gap far from stability. Mass models with a strong shell gap converge to an r-process distribution that is independent of the initial conditions once fission sets in. This convergence is not achieved in mass models with a quenched N = 82 shell gap. (c) 2007 Published by Elsevier B.V.

引用

页码：199 / 205

页数：7

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