Rotational quenching of HD induced by collisions with H2 molecules. Issue 1 (25th June 2019)

• Record Type: Journal Article
• Authors: Wan, Yier; Balakrishnan, N; Yang, B H; Forrey, R C; Stancil, P C
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 488:Issue 1(2019)
• Page Start: 381
• Page End: 386
• Publication Date: 2019-06-25
• Subjects: molecular data -- molecular processes -- scattering; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stz1735
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: Rate coefficients for rotational transitions in HD induced by H2 impact for rotational levels of HD j ≤ 8 and temperatures 10 K ≤ T ≤ 5000 K are reported. The quantum mechanical close-coupling (CC) method and the coupled-states (CS) decoupling approximation are used to obtain the cross-sections employing the most recent highly accurate H2 –H2 potential energy surface (PES). Our results are in good agreement with previous calculations for low-lying rotational transitions The cooling efficiency of HD compared with H2 and astrophysical applications are briefly discussed.