Function Fits to Full-energy Peak Efficiency Curves of Ge (Li) Detectors

Abstract

Full-energy peak efficiencies of Ge (Li) detectors in the gamma-ray energy range of 120 to 2800 keV were experimentally measured by using calibrated standard sources. Five kinds of analytical function were fitted to the experimental points by leastsquares method. Fittabilities of these functions to the points in the different gamma-ray energy range were compared.
As a result, the most successful of these functions was the polynomial,
1n ε (E) =NΣi=0 a_i (1nE) ⁱ,
where ε is the efficiency and E is the corresponding gamma-ray energy.