Counter Telescope Efficiency Calculation for a Nonisotropic Neutron Source

Abstract

The measurement of neutron cross sections with a counter telescope involves a calculation of the telescope efficiency. Past work has treated the case of an isotropic point source of neutrons. In the present work equations are derived for a nonisotropic point source of neutrons. The efficiency equations were evaluated by means of an IBM 704 computer for various experimental conditions and the results are presented in tables.