1969•Unpublished venueOpen access
Ca SO$sub 4$ AS A TL NEUTRON DOSIMETER.
Madison. Dept. of Minerals and Metals Engineering Wisconsin Univ., E Podgorsak, US Atomic Energy Commission (AEC), James M. Hevezi, John Cameron
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Abstract
Ca SO4:Mn has a rapid fading of thermoluminescence (TL) to 60% of its original value in 24 hours (1).It is, nevertheless, the most sensitive TLD phosphor available at present.Doping the phosphor with rare earth elements has been shown to reduce the fading problem (2), but these are not the only activators which were found to improve the dosimetric properties of Ca SO4.No fading was apparent when Ca. SO4:Mn:Na was tested over a three day period.Evaluation of this phosphor as a neutron dosimeter is the subject of this report.The phosphors are excited by indirect mechanisms such as recoil protons, gamma rays from the (n,r) reaction, alpha particles from the (n,a) reaction, or fission products.
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