FENG, XZ (reprint author), ACAD SINICA,INST HIGH ENERGY PHYS,POB 2732,BEIJING,PEOPLES R CHINA.
In the present paper, a new improved expression for gamma-ray detection efficiency of Ge(Li) detectors, epsilon-gamma-0, is given. It is represented as a continuous function of x (viz. E-gamma-1) with a maximum and decreases very rapidly to a small positive value as gamma-ray energy, E-gamma, drops to 40 keV or lower, but slowly as E-gamma rises to 1.7 MeV or higher. Since it can well represent the whole physical process of the gamma-ray detection, this expression may be one of the simplest and most precise representations, for epsilon-gamma-0 at the present time.