HPGe detector absolute-peak-efficiency calibration by using the ESOLAN program

New algorithm for studying the effect of self attenuation factor on the efficiency of γ-rays detectors

“…(4) and (5) respectively. These will be discussed in details according to the source-detector configuration as shown below.…”

“…The determination of the activity of different kinds of samples generally necessitates time consuming efficiency calibrations for any specific geometry [1]. Because the experimental calibration of full-energy peak efficiency is tedious and difficult for extended sources, a great deal of research [2][3][4][5][6][7][8] has been focused on the development of computational techniques to solve this problem. Also, Abbas and Selim [9][10][11][12][13][14], solved this problem by derived direct analytical integrals of the detector efficiencies (total and full-energy peak) for any source-detector configuration and implemented these analytical expressions into a numerical integration computer program.…”

Analytical Formulae to Calculate the Total Efficiency of an Arbitrarily Positioned Point Source by an Elliptical Cylindrical Detector

“…By combining Eqs. (7)(8)(9)(10)(11)(12)(13), results in direct mathematical expression for the total efficiency subtended by an elliptical cylindrical detector, from an isotropic radiating central point source S (0, 0, h). …”

“…Several authors [2][3][4][5][6][7][8] have been treated the issue concerning with the absolute efficiencies determination and have given some useful solutions to this problem. Recently, Selim and Abbas [9][10][11][12][13][14][15] calculated the total and full-energy peak efficiencies for any source-detector configuration using spherical coordinates system.…”

Empirical formulae for calculating γ-ray detectors effective solid angle ratios

“…This method is tedious and time consuming process. In order to overcome the problems of the experimental method, several non-experimental methods [2][3][4][5][6] have been proposed and applied, depending on the photon energy, source-to-detector geometry and volume. One of the most common approaches is called the ef iciency transfer method.…”