Ortho-para equilibrium in a liquid D2 neutron moderator under irradiation

F. Atchison, P. Beaud, T. Bryś, M. Daum, P. Fierlinger, R. Henneck, T. Hofmann, K. Kirch, G. Kühne, G. Knopp, A. Pichlmaier, A. Serebrov, H. Spitzer, J. Wambach, J. Wimmer, A. Wokaun, K. Bodek, P. Geltenbort, M. Giersch, J. ZmeskalK. Mishima

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

19 Zitate (Scopus)

Abstract

The ortho-D2 concentration of gas samples taken from the liquid D2 cold moderator of the SINQ spallation neutron source at PSI has been measured. A value of co=0.762±0.001(statistical)±0.006(systematical) for the in situ quasiequilibrium at a temperature of 25 K and at an almost continuous power deposition of 230±50 mW/g is established for samples taken after long irradiation periods. This unexpectedly low value, (math equation) is explained by a simple radiation-induced breakup and recombination model for D2 molecules.

OriginalspracheEnglisch
FachzeitschriftPhysical Review B - Condensed Matter and Materials Physics
Jahrgang68
Ausgabenummer9
DOIs
PublikationsstatusVeröffentlicht - 2003
Extern publiziertJa

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