Calculation of generalized Hubbell rectangular source integral

Appl Radiat Isot. 2011 Jan;69(1):90-3. doi: 10.1016/j.apradiso.2010.07.018. Epub 2010 Aug 4.

Abstract

A simple formula for computing the generalized Hubbell radiation rectangular source integral [formula in text] is introduced. Tables are given to compare the numerical values derived from our approximation formula with those given earlier in the literature.