Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1879858 | Applied Radiation and Isotopes | 2006 | 4 Pages |
Abstract
The radioactivity of 99mTc was standardized by the 4ÏPC-γ 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 keV γ-rays. The background of the K X-ray peak and the sensitivity of the proportional counter (PC) to 140 keV γ-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.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
Maria Sahagia,