Gamma-Ray Attenuation Factors for Angular Correlation and Angular Distribution Measurements

Abstract
The angular resolution and azimuthal symmetry of an unshielded NaI scintillation counter was measured for gamma rays between 0.5 and 2.8 Mev in order to estimate correction factors needed in determining angular correlation functions. The results are in agreement with the corrections calculated by Rose, and extended by Stanford and Rivers, for similar scintillation crystal geometry.