Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1879619 | Applied Radiation and Isotopes | 2008 | 7 Pages |
Abstract
The activity of a 22Na solution was measured by means of two 4Ïβâγ coincidence-counting techniques. The first method corresponds to the classical 4Ïβâγ coincidence counting and requires the β+-branching ratio. The second procedure is based on a variation of the distance between source and gamma detector. The efficiency for detecting the sum peak is then extrapolated to zero, giving the total source activity. The combination of both methods yields the β+ branching ratio. In addition, liquid scintillation counting using the CIEMAT/NIST-method as well as a secondary standardization by means of calibrated ionization chambers were used for activity determination. The results were checked for consistency and an ampoule was submitted to the BIPM to have the activity result entered into the database of the International Reference System (SIR).
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
O. Nähle, K. Kossert, R. Klein,