ELASTIC-SCATTERING OF HYDROGEN-ATOMS AT LOW-TEMPERATURES

被引：47
|
作者：
JAMIESON, MJ [1 ]
DALGARNO, A [1 ]
YUKICH, JN [1 ]
机构：
[1] UNIV GLASGOW, DEPT COMP SCI, GLASGOW G12 8QQ, SCOTLAND
来源：
PHYSICAL REVIEW A | 1992年 / 46卷 / 11期
关键词：
D O I：
10.1103/PhysRevA.46.6956
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The elastic scattering of two hydrogen atoms interacting at very small energies is explored numerically using the most accurate potential-energy curves available for the X1SIGMA(g)+ and b3SIGMA(u)+ states of H-2. The scattering lengths and low-temperature-averaged cross sections are determined and compared with previous calculations. The scattering lengths are 0.41a0 for the singlet case and 1.91a0 for the triplet. The predicted total triplet cross section at 2 K is 5.5 X 10(-15) cm2 but it could be lower, at 4.8 X 10(-15) cm2, with a different fit to the triplet potential between 12a0 and 15a0. A more accurate triplet-state potential is needed at these separations.
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页码：6956 / 6961
页数：6
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