## Abstract

Application of photon general cavity theory requires knowledge of the electron mass attenuation coefficient, β. One approach has been to adopt values of β derived from the attenuation of beta ray spectra, which are based on a one-to-one correspondence between β and the maximum energy of the beta ray spectrum. Other approaches are also available, so that, for ^{60}Co generated electrons, for example, six different empirical expressions yield values of β for LiF from a minimum value of 5.16 cm^{2}.g^{-1} to a maximum value of 14.26 cm^{2}.g^{-1}. The results are reported of coupled photoelectron Monte Carlo calculations over a wide range of photon energies, 0.1 MeV < E < 1.4 MeV, and wall materials; Al, Cu, Cd and Pb. For the relatively low Z materials and over the energy range 0.3 MeV to 1.4 MeV, β in LiF is given to within an accuracy of ± 10% by the relation p = 10.5 E^{-1.82} where E is expressed in MeV. β is strongly dependent on Z so that for the high Z materials a simple power law relationship does not exist for any extended range of gamma ray energies.

Original language | English |
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Pages (from-to) | 41-44 |

Number of pages | 4 |

Journal | Radiation Protection Dosimetry |

Volume | 65 |

Issue number | 1-4 |

DOIs | |

State | Published - 1 Jan 1996 |

## ASJC Scopus subject areas

- Radiation
- Radiological and Ultrasound Technology
- Radiology Nuclear Medicine and imaging
- Public Health, Environmental and Occupational Health