Total cross section of the 3H(p,n)3He reaction from threshold to 4.5 MeV -: art. no. 015801

被引：34
|
作者：
Brune, CR [1 ]
Hahn, KI [1 ]
Kavanagh, RW [1 ]
Wrean, PR [1 ]
机构：
[1] CALTECH, WK Kellogg Radiat Lab, Pasadena, CA 91125 USA
来源：
PHYSICAL REVIEW C | 1999年 / 60卷 / 01期
关键词：
D O I：
10.1103/PhysRevC.60.015801
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We report new measurements of the total cross section for the H-3(p,n)He-3 reaction from threshold (E-p = 1.02 MeV) to E-p=4.5 MeV. The experiment utilized specially prepared Ti-H-3 targets, and neutrons were detected using a 4 pi detector. A weak resonant structure due to an excited state in He-4 is observed which was not seen in previous cross section measurements. A new expression for the He-3(n,p)H-3 thermonuclear reaction rate for temperatures below 10 GK is presented which will allow for more accurate calculations of the yields of light elements produced by big-bang nucleosynthesis. [S0556-2813(99)03307-5].
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页数：8
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