Accession Number : AD0711588

Title :   INTRINSIC EFFICIENCY OF THERMOLUMINESCENT DOSIMETRY PHOSPHORS.

Descriptive Note : Final rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Lucke,William H.

Report Date : 13 AUG 1970

Pagination or Media Count : 43

Abstract : The intrinsic efficiency is defined as the ratio of light energy emitted during heating to energy absorbed during gamma irradiation. This factor was measured for four commonly used thermoluminescent phosphors to give the following results: LiF(TLD-100), 0.039%; Li2B4O7:Mn, 0.073% (both corrected for supralinearity); CaF2:Mn, 0.44%; and CaSO4:Mn, 1.2%. The method of measurement involved calibrating a detector, which consisted of a narrow bandpass filter in conjunction with a photomultiplier, by means of the light of a standard lamp diffusely reflected from a MgO button having the same size, shape, and position as the phosphor-bearing planchet. A correction was made to account for the fact that the phosphor samples were not Lambertaian sources. (Author)

Descriptors :   (*DOSIMETERS, EFFICIENCY), (*PHOSPHORESCENT MATERIALS, *THERMOLUMINESCENCE), GAMMA RAYS, DOSE RATE, LIGHT, PHOTOMULTIPLIER TUBES, BAND PASS FILTERS, INTEGRAL EQUATIONS, NUMERICAL INTEGRATION

Subject Categories : Radiobiology
      Nuclear Instrumentation
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE