Analytical calculations of the solid angle subtended by a circular detector at linear sources
Authors: Abbas Mahmoud I.
Keywords: geometrical solid angle; geometrical efficiency; linear sources; circular detector
Abstract:
Knowledge of the geometrical solid angle is essential in all absolute measurements of the strengths of radioactive materials and to calibrate detectors. A direct mathematical formalism for the determination of the geometrical solid angle and the geometrical efficiency of a circular detector and an arbitrarily positioned line source is deduced. The results have been compared with previous computational treatments. The comparison shows a very satisfactory agreement in all cases.