Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sf2a.conf..413l&link_type=abstract
"SF2A-2008: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: C. Charbonnel, F. Combes
Astronomy and Astrophysics
Astrophysics
Scientific paper
Many hydrogenated species observed in space in cold media, exist in different nuclear spin configurations. In cometary's atmospheres and in interstellar molecular clouds, the relative populations of these 'nuclear spin isomers' deviate significantly from the thermal equilibrium. Experimental studies are therefore required to understand the parameters governing the nuclear spin enrichment and conversion in astrophysical conditions, especially in presence of ice. We present new experimental results of the nuclear spin conversion dynamics for CH_4 trapped in rare gas matrices between 4K and 20K. Results revealed for methane are compared to those obtained with water.
Abouaf-Marguin L.
Fillion Jean-Hugues
Lekic A.
Michaut Xavier
Pardanaud C.
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