The Dosimetry of Mixed Radiations, Involving More Than One Energy or Type of Radiation, with the R.P.S./A.E.R.E. Film Dosimeter

Paper presented ay a Symposium on “Photographic Aspects of Ionizing Radiation”, organized by the Science Committee on 15–17 April 1964, in Oxford.

Abstract

The design of the R.P.S./A.E.R.E. film holder is basically suitable for the evaluation of single quality radiation doses. In practice, however, doses may be recorded which consist of mixtures of X, ß and γ radiations with a variety of different energies, and to deal with these suitable methods have been devised empirically. The assessment of mixed doses of the same type of radiation but with different energies is shown to be reasonably straightforward. However, doses involving mixtures of ß and γ radiations are more difficult to determine. Reasonable accuracy is attained provided the γ-ray energy is above about 22 keV, but below this value no suitable method exists with the present design of holder. However, a method employing the use of high “Z” metallic filters is discussed and shown to be satisfactory if the practical difficulties can be overcome.

Notes

Paper presented ay a Symposium on “Photographic Aspects of Ionizing Radiation”, organized by the Science Committee on 15–17 April 1964, in Oxford.