Accession Number : ADA187438

Title :   Thermoluminescence Response of CaF2:Mn, CaFz:Dy and CaSO4:Tm to Protons and Alpha-Particles,

Corporate Author : DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s) : McGowan, S ; Gravelle, R A

PDF Url : ADA187438

Report Date : Jun 1987

Pagination or Media Count : 20

Abstract : Proton/gamma and alpha/gamma response ratios have been measured for very fine powders of the thermoluminescent phosphors CaF2:Mn, CaF2:Dy and CaSO4:Tm. This has been done as Part of an evaluation of these phosphors for use in a combined neutron/gamma thermoluminescent dosimeter which is made neutron sensitive by embedding the phosphor powder in an hydrogenous medium. The CaF2:Mn phosphor has been found to be marginally better than the other two for this purpose. Reduction in the measured proton/gamma response ratio with decreasing proton energy has been attributed primarily to relatively low response near the surfaces of the phosphor particles. Keywords: Thermoluminescence, Radiation dosimetry, Gamma, Proton, Alpha particle, Linear energy transfer, Canada.

Descriptors :   *ALPHA PARTICLES, *PROTONS, CANADA, DOSIMETERS, DOSIMETRY, EMBEDDING, ENERGY, ENERGY TRANSFER, FINE GRAINED MATERIALS, GAMMA RAYS, HYDROGEN, LINEARITY, NEUTRONS, PARTICLES, PHOSPHORS, POWDERS, RATIOS, RESPONSE, SENSITIVITY, THERMOLUMINESCENCE, CALCIUM COMPOUNDS

Subject Categories : Inorganic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE