Neutron dosimetry with spherical ionisation chambers. I. Theory of the dose conversion factors r and Wn
- 1 July 1982
- journal article
- research article
- Published by IOP Publishing in Physics in Medicine & Biology
- Vol. 27 (7) , 893-904
- https://doi.org/10.1088/0031-9155/27/7/001
Abstract
A model for the calculation of the deposition of energy and the production of ionisation by neutrons in finite spherical cavity ionisation chambers is described. Contributions from particles entering the cavity from the wall (crossers and stoppers) and particles produced in the gas (insiders and starters) are included. Composition and stopping power of wall material and gas are arbitrary. The limiting cases, a Bragg-Gray (infinitesimal) and an infinite cavity, are also discussed. The calculation of the average energy needed to produce one ion pair, Wn, the dose conversion factor, r, and the average charge, q, produced by one neutron incident per unit area are discussed from monoenergetic neutrons as well as for neutron spectra. Earlier approximations of r and Wn are described.This publication has 10 references indexed in Scilit:
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