Further discussion on the conversion of beta-ray dose rates measured in air to dose rates in skin

Publisher Website
Google Scholar
Abstract
In 1974 the British Committee on Radiation Units and Measurements, with reference to .beta.-radiation from 3 radionuclides, recommended values of factors to derive the absorbed dose rate to tissue averaged between 5 and 10 mg cm-2 beneath the [human] skin surface from measurements of the absorbed dose rate to air under conditions of air scatter only. The conversion factors take account of the difference in backscattering between air and tissue, the average mass stopping power ratio of tissue to air and the transmission averaged through 5-10 mg cm-2 of tissue. The BCRU conversion factors were measured for NPL [National Physical Laboratory] secondary-standard sources under specified conditions of use. Use of these factors will: overestimate the absorbed dose to tissue for a source with minimal backscatter and attenuation; underestimate the absorbed dose to tissue when the skin surface is close to, or at, the source surface. The BCRU conversion factors have a more restricted application than implied at the time of publication.

This publication has 4 references indexed in Scilit: