PMID: 432267Jan 1, 1979

Calculations of charged-particle recoils, slowing-down spectra, LET and event-size distributions for fast neutrons and comparisons with measurements

Physics in Medicine and Biology
Thomas B Borak, T G Stinchcomb

Abstract

A rapid system has been developed for computing charged-particle distributions generated in tissue by any neutron spectra less than 4 MeV. Oxygen and carbon recoils are derived form R-matrix theory, and hydrogen recoils are obtained from cross-section evaluation. Application to two quite different fission-neutron spectra demonstrates the flexibility of this method for providing spectral details of the different types of charged-particle recoils. Comparisons are made between calculations and measurements of event-size distributions for a sphere of tissue 1 micrometer in diameter irradiated by these two neutron spectra. LET distributions have been calculated from computed charged-particle recoils and also derived from measurements using the conventional approximation that all charged particles traverse the chamber. The limitations of the approximation for these neutron spectra are discussed.

References

Jan 1, 1977·Medical Physics·J B SmathersL J Goodman
Apr 1, 1972·Health Physics·G D OliverW O Wilde

Citations

Jan 1, 1989·Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)·E J AinsworthR J Fry
Jan 5, 2002·Health Physics·Thomas B Borak
Apr 15, 2011·The Cochrane Database of Systematic Reviews·Susan FurnessDavid I Conway

Related Concepts

Vitreous Carbon
Energy Transfer
Fast Neutrons
Neutrons
Dioxygen
Protons
Gray Units
Scattering, Radiation

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