Radiation shielding of an 8 in x 6 in Nal(TI) crystal for use in keV neutron capture experiments.

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dc.contributor.authorBroomhall, GJen_AU
dc.date.accessioned2007-11-22T04:33:09Zen_AU
dc.date.accessioned2010-04-30T04:41:13Zen_AU
dc.date.available2007-11-22T04:33:09Zen_AU
dc.date.available2010-04-30T04:41:13Zen_AU
dc.date.issued1971-11en_AU
dc.description.abstractThe sensitivity of large NaI(TI) detectors to background radiation inhibits their use in measuring partial neutron capture cross sections in the keV energy region. Major sources of neutron induced background are the iodine in the crystal and iron in structural materials. In a survey of possible neutron shielding materials, a 70 percent by weight mixture of boron carbide in paraffin most readily reduced keV neutron fluxes. The use of a multi-layered shield assembly, incorporating an inner sleeve of boron carbide and lead shot in a litharge/glycerine cement, gave a factor of 10 improvement in the counts-to-background ratio at the 37 keV resonance in 48Ti.en_AU
dc.identifier.citationBroomhall, G. J. (1971). Radiation shielding of an 8 in x 6 in Nal(TI) crystal for use in keV neutron capture experiments (AAEC/TM603). Lucas Heights, N.S.W.: Australian Atomic Energy Commission.en_AU
dc.identifier.govdoc848en_AU
dc.identifier.isbn0642994420en_AU
dc.identifier.otherAAEC-TM-603en_AU
dc.identifier.placeofpublicationLucas Heights, New South Walesen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/838en_AU
dc.language.isoen_auen_AU
dc.publisherAustralian Atomic Energy Commissionen_AU
dc.subjectBoron carbidesen_AU
dc.subjectGamma spectraen_AU
dc.subjectThalliumen_AU
dc.subjectNeutron capture therapyen_AU
dc.subjectShieldingen_AU
dc.subjectScintillation countersen_AU
dc.titleRadiation shielding of an 8 in x 6 in Nal(TI) crystal for use in keV neutron capture experiments.en_AU
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