Stellar (n,GAMMA;) cross sections of neutron-rich nuclei

被引：0
|
作者：
Marganiec, J. [1 ]
Dillmann, I. [1 ]
Pardo, C. Domingo [1 ]
Kaeppeler, F. [1 ]
机构：
[1] GSI Helmholtzzent Schwerionenforsch GmbH, Planckstr 1, D-64291 Darmstadt, Germany
来源：
FIFTH EUROPEAN SUMMER SCHOOL ON EXPERIMENTAL NUCLEAR ASTROPHYSICS | 2010年 / 1213卷
关键词：
s process; r process; Nuclear astrophysics; Stellar nucleosynthesis; NUCLEOSYNTHESIS;
D O I：
10.1063/1.3362587
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The present measurements were performed by means of the activation technique. Neutrons were produced at the Karlsruhe Van de Graaff accelerator via the Li-7(p,n)Be-7 reaction. For proton energies just above threshold, one obtains a neutron spectrum similar to a Maxwellian distribution for kT = 25 keV. This quasi-stellar neutron spectrum allowed us to measure the Maxwellian, averaged cross sections directly. The experimental results of Yb-174,Yb-176, W-184,W-186, Os-190,Os-192 Pt-196,Pt-198, and Hg-202 were extrapolated from kT = 25 keV to lower and higher temperatures.
引用
收藏
页码：219 / +
页数：2
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