The ortho-to-para conversion in solid hydrogen, catalyzed by hydrogen atoms

Journal Article · Wed Jun 01 00:00:00 EDT 1994 · Journal of Low Temperature Physics; (United States)

DOI:https://doi.org/10.1007/BF00754716· OSTI ID:6823918

Shevtsov, V; Frolov, A; Lukashevich, I ^[1]; Ylinen, E; Malmi, P; Punkkinen, M ^[2]

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1. Kurchatov Institute, Moscow (Russian Federation)
2. Univ. of Turku (Finland)

The combined techniques of ESR and NMR were used to investigate the process of ortho-para conversion in solid molecular hydrogen, containing small amounts ([approximately]500 ppm) of hydrogen atoms as impurity. Although the impurity atoms catalyze the effective conversion of the neighboring ortho-H[sub 2], the total catalyzed conversion rate at temperatures from 2.2 K to 4.4 K is much less than expected from the rate of the H atoms recombination. A possible explanation is given in terms of the diffusion of H atoms, which is confined to some defects in the crystal.

• OSTI ID: 6823918
• Journal Information: Journal of Low Temperature Physics; (United States), Vol. 95:5-6; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

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