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19 April 2024

» pubmed » pmid16383898

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Measured total cross sections of slow neutrons scattered by solid deuterium and implications for ultracold neutron sources
F Atchison ; B Blau ; B van den Brandt ; T Bry? ; M Daum ; P Fierlinger ; P Hautle ; R Henneck ; S Heule ; K Kirch ; J Kohlbrecher ; G Kühne ; J A Konter ; A Pichlmaier ; A Wokaun ; K Bodek ; M Kasprzak ; M Ku?niak ; P Geltenbort ; J Zmeskal ;
Date:	28 Oct 2005
Journal:	Phys Rev Lett, 95 (18), 182502
Abstract:	The total scattering cross sections for slow neutrons with energies in the range 100 neV to 3 meV for solid ortho-2H2 at 18 and 5 K, frozen from the liquid, have been measured. The 18 K cross sections are found to be in excellent agreement with theoretical expectations and for ultracold neutrons dominated by thermal up scattering. At 5 K the total scattering cross sections are found to be dominated by the crystal defects originating in temperature induced stress but not deteriorated by temperature cycles between 5 and 10 K.
Source:	PubMed, pmid16383898
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