Published December 1975 | Version v1
Journal article Metadata-only

Temperature dependence of spin exchange frequency shifts in H-H collisions

Creators

  • 1. Centre National de la Recherche Scientifique, 91 - Orsay (France). Lab. de l'Horloge Atomique
  • 2. Laval Univ., Quebec City (Canada)

Description

Experimental data on the spin exchange frequency shifts due to hydrogen-hydrogen spin exchange collisions are reported over the temperature range 77K to 363K. They are found to agree with the results of a theoretical calculation of the temperature dependence of the spin exchange frequency shift cross-section and with an experimental result obtained by a different technique near room temperature. The experimental results confirm the prediction that the spin exchange frequency shift cross-section changes sign at low temperature

Abstract (French)

La mesure du deplacement de la frequence de transition hyperfine, par echange de spins, dans les collisions hydrogene-hydrogene est decrite dans la gamme de temperature 77K-363K. Les donnees experimentales s'accordent avec les resultats d'un calcul theorique de la variation avec la temperature de la sections efficace du deplacement de frequence par echange de spins et avec un resultat experimental obtenu a 308K, a l'aide d'une technique differente. On confirme experimentalement que la section efficace du deplacement de frequence par echange de spins change de signe a basse temperature, comme le prevoit la theorie

Additional details

Identifiers

DOI
10.1051/jphyslet:019750036012028100;

Publishing Information

Journal Title
Journal de Physique Lettres
Journal Volume
36
Journal Issue
12
Series
J. Phys. (Paris), Lett.
Journal Page Range
281-284
ISSN
0302-072X

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
7246522
Subject category
S74: ATOMIC AND MOLECULAR PHYSICS;
Descriptors DEI
ATOM-ATOM COLLISIONS; HYDROGEN; LOW TEMPERATURE; SPIN EXCHANGE; TEMPERATURE DEPENDENCE
Descriptors DEC
ATOM COLLISIONS; COLLISIONS; ELEMENTS; NONMETALS

Optional Information

Notes
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