Cross sections and fragment distributions from neutrino-induced fission on r-process nuclei

被引：21

作者：

Kelic, A ^{[1
]}

Zinner, N

Kolbe, E

Langanke, K

Schmidt, KH

机构：

[1] Gesell Schwerionenforsch Inst Darmstadt, D-6100 Darmstadt, Germany

[2] Aarhus Univ, Inst Phys & Astron, DK-8000 Aarhus, Denmark

[3] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland

来源：

PHYSICS LETTERS B | 2005年 / 616卷 / 1-2期

关键词：

D O I：

10.1016/j.physletb.2005.04.074

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study neutrino-induced processes that might contribute to the observed patterns in the r-process abundances in low-metallicity, old galactical halo stars. The neutrino-nucleus interaction is calculated within the random phase approximation, while the decay of excited levels in the daughter nucleus is followed via the evaporation-fission code ABLA. We calculate the fission cross sections for selected neutron-rich progenitor nuclei with Z(prog) > 80. More importantly, we calculate the mass and charge distributions of the fission fragments as well as the number of neutrons set free in the neutrino-induced reactions. We particularly study a sample of nuclei with A(prog) > 200 representing r-process progenitors during their decay towards the valley of stability after the r-process freeze-out. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：48 / 58

页数：11

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