Research Papers in Physics and Astronomy


Date of this Version

November 1986


Published in Nuclear Tracks and Radiation Measurements 11:6 (1986), pp. 301–307; now known as Radiation Measurements; formerly International Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements. Published by Pergamon Journals Ltd. Used by permission.


A fit to the experimental data for the response of the Fricke dosimeter to energetic heavy ions is obtained using a calculation of the relative effectiveness of a 1-hit detector, from track theory. We use 2 fitted parameters, the target size, a0, which may be thought to represent a “diffusion length,” and E0, the dose of gamma-rays at which there is an average of one hit per target (the D-37 dose), and a new algorithm for the average radial distribution of dose in liquid water from the passing ion. The G value for ions is then given as the product of the calculated relative effectiveness and the experimental G value for gamma rays.

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