Calibration of ARI QC ionisation chambers using the Australian secondary standards for activity
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Australian Nuclear Association
Abstract
The Secondary Standard Activity Laboratory (SSAL) in ANSTO routinely provides standardised radioactive sources, traceable activity measurements and custom source preparation services to customers. The most important activity carried out is the calibration of ionisation chambers located in the Quality Control (QC) section of Australian Radioisotopes (ARI). This ensures that their activity measurements are traceable to the Australian primary methods of standardisation. ARI QC ionisation chambers are calibrated for 99mTc, 67Ga, 131I, 201Tl and 153Sm. The SSAL has a TPA ionisation chamber, which has been directly calibrated against a primary standard for a variety of radioactive nuclides. Calibration factors for this chamber were determined specifically for the actual volumes (5ml for 99mTc, 131I, 2ml for 67Ga, 201Tl and 3 ml for 153Sm) and types of vial (Wheaton) which are routinely used at ARI. These calibration factors can be used to accurately measure the activity of samples prepared by ARI. The samples can subsequently be used to calibrate the QC ionisation chambers. QC ionisation chambers are re-calibrated biannually.
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Physical copy held by ANSTO Library at DDC: 621.48/10.
Keywords
Australian organizations, Activity levels, ANSTO, Beta decay radioisotopes, Beta-minus decay radioisotopes, Calibration standards, Data, Days Living Radioisotopes, Electron capture radioisotopes, Gallium 67, Iodine 131, Ionization chambers, Numerical data, Radiation sources, Technetium 99, Thallium 201, Years living radioisotopes
Citation
Mo, L., Van Der Gaast, H. A., Alexiev, D., Butcher, K. S. A., & Davies, J. (1999). Calibration of ARI QC ionisation chambers using the Australian secondary standards for activity Paper presented to ANA 99 "Third Conference on Nucelar Science & Engeering, Canberra, ACT, Australia, 27-28 October 1999. In ANA Conference on Nuclear Science & Engineering in Australia, & Australian Nuclear Association. (1999). ANA 99 : third Conference on Nuclear Science & Engineering in Australia, Rydges Canberra Hotel, Canberra A.C.T. Australia, 27-28 October 1999: conference handbook: theme, a nuclear renaissance (pp. 140-142). Canberra, ACT : Australian Nuclear Association.