Absolute measurements of state-to-state rotational energy transfer between CO and H2 at interstellar temperatures

被引：5

作者：

Labiad, Hamza ^{[1
]}

Fournier, Martin ^{[1
]}

Mertens, Laura A. ^{[1
,2
]}

Faure, Alexandre ^{[3
]}

Carty, David ^{[4
,5
]}

Stoecklin, Thierry ^{[6
]}

Jankowski, Piotr ^{[7
]}

Szalewicz, Krzysztof ^{[8
]}

Le Picard, Sebastien D. ^{[1
]}

Sims, Ian R. ^{[1
]}

机构：

[1] Univ Rennes, CNRS, IPR Inst Phys Rennes, UMR 6251, F-35000 Rennes, France

[2] CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA

[3] Univ Grenoble Alpes, IPAG Inst Planetol & Astrophys Grenoble, CNRS, F-38000 Grenoble, France

[4] Univ Durham, Joint Quantum Ctr Durham Newcastle, Dept Phys, South Rd, Durham DH1 3LE, England

[5] Univ Durham, Joint Quantum Ctr Durham Newcastle, Dept Chem, South Rd, Durham DH1 3LE, England

[6] Univ Bordeaux, Inst Sci Mol, F-33405 Talence, France

[7] Nicolaus Copernicus Univ Torun, Fac Chem, Gagarina 7, PL-87100 Torun, Poland

[8] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

来源：

PHYSICAL REVIEW A | 2022年 / 105卷 / 02期

基金：

美国国家科学基金会;

关键词：

COLLISIONS; HE; EXCITATION; AR;

D O I：

10.1103/PhysRevA.105.L020802

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Experimental measurements and theoretical calculations of state-to-state rate coefficients for rotational energy transfer of CO in collision with H-2 are reported at the very low temperatures prevailing in dense interstellar clouds (5-20 K). Detailed agreement between quantum state-selected experiments performed in cold supersonic flows using time-resolved infrared-vacuum-ultraviolet double-resonance spectroscopy and close-coupling quantum scattering calculations confirms the validity of the calculations for collisions between the two most abundant molecules in the interstellar medium.

引用

页数：6

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