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Abstract. In order to clarify neutronic performance of a pulsed cold-neutron source, scattering properties of some typical hydrogenous moderators are studied. Namely, cross-section models for liquid ortho- and para-H2 at temperatures between 14 and 20.4K and solid and liquid CH4 at temperatures down to 20K are developed. A set of group constants for liquid H2 is also generated: 80 groups between 0...
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