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. Zmeskal; K. Mishima

doi:10.1103/PhysRevB.68.094114

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. Zmeskal

K. Mishima

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

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 c_o=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.

Original language	English
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	68
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.68.094114
State	Published - 2003
Externally published	Yes

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Atchison, F., Beaud, P., Bryś, T., Daum, M., Fierlinger, P., Henneck, R., Hofmann, T., Kirch, K., Kühne, G., Knopp, G., Pichlmaier, A., Serebrov, A., Spitzer, H., Wambach, J., Wimmer, J., Wokaun, A., Bodek, K., Geltenbort, P., Giersch, M., ... Mishima, K. (2003). Ortho-para equilibrium in a liquid D₂ neutron moderator under irradiation. Physical Review B - Condensed Matter and Materials Physics, 68(9). https://doi.org/10.1103/PhysRevB.68.094114

@article{f0cae6a5c4ee40d2963c90f1b0c39fd6,

title = "Ortho-para equilibrium in a liquid D2 neutron moderator under irradiation",

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.",

author = "F. Atchison and P. Beaud and T. Bry{\'s} and M. Daum and P. Fierlinger and R. Henneck and T. Hofmann and K. Kirch and G. K{\"u}hne and G. Knopp and A. Pichlmaier and A. Serebrov and H. Spitzer and J. Wambach and J. Wimmer and A. Wokaun and K. Bodek and P. Geltenbort and M. Giersch and J. Zmeskal and K. Mishima",

year = "2003",

doi = "10.1103/PhysRevB.68.094114",

language = "English",

volume = "68",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

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}

Atchison, F, Beaud, P, Bryś, T, Daum, M, Fierlinger, P, Henneck, R, Hofmann, T, Kirch, K, Kühne, G, Knopp, G, Pichlmaier, A, Serebrov, A, Spitzer, H, Wambach, J, Wimmer, J, Wokaun, A, Bodek, K, Geltenbort, P, Giersch, M, Zmeskal, J & Mishima, K 2003, 'Ortho-para equilibrium in a liquid D₂ neutron moderator under irradiation', Physical Review B - Condensed Matter and Materials Physics, vol. 68, no. 9. https://doi.org/10.1103/PhysRevB.68.094114

TY - JOUR

T1 - Ortho-para equilibrium in a liquid D2 neutron moderator under irradiation

AU - Atchison, F.

AU - Beaud, P.

AU - Bryś, T.

AU - Daum, M.

AU - Fierlinger, P.

AU - Henneck, R.

AU - Hofmann, T.

AU - Kirch, K.

AU - Kühne, G.

AU - Knopp, G.

AU - Pichlmaier, A.

AU - Serebrov, A.

AU - Spitzer, H.

AU - Wambach, J.

AU - Wimmer, J.

AU - Wokaun, A.

AU - Bodek, K.

AU - Geltenbort, P.

AU - Giersch, M.

AU - Zmeskal, J.

AU - Mishima, K.

PY - 2003

Y1 - 2003

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/0242331089

U2 - 10.1103/PhysRevB.68.094114

DO - 10.1103/PhysRevB.68.094114

M3 - Article

AN - SCOPUS:0242331089

SN - 1098-0121

VL - 68

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 9

ER -

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

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