Fading Characteristics of Alpha Radiation Signals Stored in an Imaging Plate

摘要

For the quantitative measurement of alpha radiation using the technique of imaging plate (IP), the fading characteristics of both the gross photostimulated luminescence (PSL) values and the counts of alpha spots in the IP irradiated with an ~(241)Am source were experimentally studied at different temperatures and elapsed times. Based on the experimental data and the proposed theory, the functions of fading correction were established by fitting the data by the least-square method and testified. The results showed that the fading correction was important and the functions were practical for more accurate measurements of alpha radiation. Compared with the traditional PSL method, the spot counting method was preferable for a more accurate measurement of alpha radiation.