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Radiat Prot Dosimetry. 2002;102(4):365-9.

Calculation of the average solid angle subtended by a detector to source in a parallel plane by a Monte Carlo method.

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West Sussex County Council, County Hall, Chichester, PO19 IRF, UK.


A short computer program is described for a PC which uses a Monte Carlo method to calculate the average solid angle subtended by a rectangular or circular detector window to a coaxial or non-coaxial rectangular, circular or point source. The advantage of the Monte Carlo method is that it allows the calculation of average solid angle for source-detector geometries that are difficult to analyse by analytical methods. The values of solid angle are calculated to accuracies of typically better than 0.1%. The calculated values from the Monte Carlo method agree closely with those produced by polygon approximation and numerical integration by Gardner and Verghese, and others.

[Indexed for MEDLINE]

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