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Hydrogen dimer features in low temperature collision-induced spectra
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0002-7629-0169
2017 (English)In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 810, no 1, 012017Article in journal (Refereed) Published
Abstract [en]

The absorption of radiation in pure hydrogen (H2) gas around the S(0) and S(1) rotational transitions is computed at 20 K and compared with laboratory data. All transitions involving free state are included in the calculations of the absolute absorption. These calculations are done with an isotropic approximation for the H2–H2 pair potential. Agreement with the experiment is observed around the S(0) transition, while the computational approach appears to be slightly worse around the S(1) transition. The positions for bound-to-bound transitions are computed including the full anisotropic pair potential. The anisotropy seems to be crucial to achieve agreement with the measured bound-to-bound transition frequencies. However, those transitions contribute little to the total absorption. The present computed absolute absorptions will provide improved input for radiative transfer models of planetary atmospheres.

Place, publisher, year, edition, pages
2017. Vol. 810, no 1, 012017
National Category
Atom and Molecular Physics and Optics Astronomy, Astrophysics and Cosmology Other Physics Topics
Research subject
Applied Physics
Identifiers
URN: urn:nbn:se:ltu:diva-62853DOI: 10.1088/1742-6596/810/1/012017ScopusID: 2-s2.0-85017205169OAI: oai:DiVA.org:ltu-62853DiVA: diva2:1086477
Conference
XXIII International Conference on Spectral Line Shapes, Toruń, Poland, 19-24 June 2016
Note

Konferensartikel i tidskrift; 2017-04-11 (andbra)

Available from: 2017-04-03 Created: 2017-04-03 Last updated: 2017-04-21Bibliographically approved

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Publisher's full textScopushttps://doi.org/10.1088/1742-6596/810/1/012017

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