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Quality Factors for Monoenergetic Neutrons

W. G. Cross and H. Ing
Radiation Research
Vol. 99, No. 1 (Jul., 1984), pp. 1-19
DOI: 10.2307/3576441
Stable URL: http://www.jstor.org/stable/3576441
Page Count: 19
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Quality Factors for Monoenergetic Neutrons
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Abstract

Mean quality factors $\overline{Q}(E_{{\rm n}})$, for the dose resulting from first interactions of monoenergetic neutrons in tissue, have been calculated at energies from thermal to 14.7 MeV. Knowledge of these values, along with kerma factors, allows the calculation of the heavy-particle dose equivalent for any known neutron spectrum in tissue. The partial quality factors for the dose delivered by C, N, and O elastic and inelastic recoils are found to be virtually independent of the scattering angular distributions and are given by simple expressions. Below about 6 MeV the accuracy of $\overline{Q}(E_{{\rm n}})$ is determined essentially by the accuracy of proton stopping powers. Between 30 keV and 4 MeV the values obtained here agree with those of T. B. Borak and T. G. Stinchcomb [Health Phys. 38, 85-88 (1980)] to within a few percent, but at lower energies the differences are considerably higher.

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