Ab initio computation of the broadening of water rotational lines by molecular hydrogen

被引：31

作者：

Wiesenfeld, Laurent ^{[1
]}

Faure, Alexandre ^{[1
]}

机构：

[1] Univ Grenoble 1, CNRS, Lab Astrophys Grenoble, F-38041 Grenoble 9, France

来源：

PHYSICAL REVIEW A | 2010年 / 82卷 / 04期

关键词：

COLLISIONAL EXCITATION RATES; VERY-LOW TEMPERATURE; CROSS-SECTIONS; H-2; GAS; H2O; ENERGY; HE; SCATTERING; ORTHO-H-2; PARA-H-2;

D O I：

10.1103/PhysRevA.82.040702

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Theoretical cross sections for the pressure broadening by hydrogen of rotational transitions of water are compared to the latest available measurements in the temperature range 65-220 K. A high-accuracy interaction potential is employed in a full close-coupling calculation. A good agreement with experiment is observed above similar to 80 K, while the sharp drop observed experimentally at lower temperatures is not predicted by our calculations. Possible explanations for this discrepancy include the failure of the impact approximation and the possible role of ortho-to-para conversion of H-2.

引用

页数：4

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