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Hydrogen dimer features in low temperature collision-induced spectra
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0002-7629-0169
2017 (engelsk)Inngår i: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 810, nr 1, artikkel-id 012017Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
Institute of Physics (IOP), 2017. Vol. 810, nr 1, artikkel-id 012017
HSV kategori
Forskningsprogram
Tillämpad fysik
Identifikatorer
URN: urn:nbn:se:ltu:diva-62853DOI: 10.1088/1742-6596/810/1/012017ISI: 000439640200017Scopus ID: 2-s2.0-85017205169OAI: oai:DiVA.org:ltu-62853DiVA, id: diva2:1086477
Konferanse
XXIII International Conference on Spectral Line Shapes, Toruń, Poland, 19-24 June 2016
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Konferensartikel i tidskrift; 2017-04-11 (andbra)

Tilgjengelig fra: 2017-04-03 Laget: 2017-04-03 Sist oppdatert: 2018-12-14bibliografisk kontrollert

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