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Standardization of 99mTc.

作者信息

Sahagia Maria

机构信息

National Institute of R&D for Physics and Nuclear Engineering Horia Hulubei, IFIN-HH, P.O. Box MG-6, Bucharest, RO-77125, Romania.

出版信息

Appl Radiat Isot. 2006 Oct-Nov;64(10-11):1234-7. doi: 10.1016/j.apradiso.2006.02.026. Epub 2006 Mar 22.

DOI:10.1016/j.apradiso.2006.02.026
PMID:16554173
Abstract

The radioactivity of 99mTc was standardized by the 4piPC-gamma coincidence method with two different modes. One is using coincidences between (119.5-142.6)keV conversion electrons and K X-rays, and the other is coincidences between the 2.13 keV conversion electrons and 140.5 keVgamma-rays. The background of the K X-ray peak and the sensitivity of the proportional counter (PC) to 140 keV gamma-rays were the main sources of uncertainties in the first case and low detection efficiency for conversion electrons in the second case. General coincidence equations were written, with specific forms, for the three measurement variants, including literature variant. Comparison with the ionization chamber calibration is reported.

摘要

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