Exposure calibration of a thimble chamber by calorimetric and ionimetric methods.

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dc.contributor.authorUrquhart, DFen_AU
dc.contributor.authorJohnson, EPen_AU
dc.contributor.authorBadger, WSen_AU
dc.date.accessioned2007-11-22T04:23:12Zen_AU
dc.date.accessioned2010-04-30T04:35:06Zen_AU
dc.date.available2007-11-22T04:23:12Zen_AU
dc.date.available2010-04-30T04:35:06Zen_AU
dc.date.issued1973-08en_AU
dc.description.abstractA Baldwin-Farmer thimble chamber, fitted with a perspex build-up cap was calibrated against an absolute graphite cavity chamber to provide an interim working standard of exposure for 137Cs and 60Co photons. The calibration factor (roentgens per coulomb) at 60Co energy was 2% higher than an NPL. 2MV calibration for this chamber, carried out in the UK by the National Physical Laboratory. The thimble chamber, fitted with an aluminium build-up cap, was also used to make a comparison between the graphite cavity chamber and an aluminium micro-calorimeter which is to be used as an interim absorbed dose standard. Exposure calibration factors for the thimble chamber derived from calorimeter measurements were in good agreement with calibration factors derived from cavity chamber measurements, at both 137Cs and 60Co energies.en_AU
dc.identifier.citationUrquhart, D. F., Johnson, E. P, & Badger, W. S. (1973). Exposure calibration of a thimble chamber by calorimetric and ionimetric methods (AAEC/E283). Lucas Heights N.S.W.: Australian Atomic Energy Commission, Research Establishment.en_AU
dc.identifier.govdoc490en_AU
dc.identifier.isbn0642995974en_AU
dc.identifier.otherAAEC-E-283en_AU
dc.identifier.placeofpublicationLucas Heights, New South Walesen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/480en_AU
dc.language.isoen_auen_AU
dc.publisherAustralian Atomic Energy Commissionen_AU
dc.subjectRadiation dosesen_AU
dc.subjectCobalt 60en_AU
dc.subjectCesium 137en_AU
dc.subjectCalorimetersen_AU
dc.subjectCalibrationen_AU
dc.subjectComparative evaluationsen_AU
dc.titleExposure calibration of a thimble chamber by calorimetric and ionimetric methods.en_AU
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