Yalçin, P.; Sülün, A.; Baştuǧ, A.; Kurucu, Y.; Şahin, Y.

The photopeak efficiency of a Si(Li) detector was determined experimentally for 3-723 keV photon energy by using liquid radioisotopes 51Cr, 67Ga, 99Tc, 111In, 131I, 201Tl and polyester coated radioisotopes 55Fe, 137Cs, 133Ba, 241Am. The efficiency for γ- and X-rays emitted in the decay of the radioactive sources was obtained from measurements. The efficiency values were established at 49 energies ranging from about 3 to 723 keV. The experimental values were fitted to an analytical function of photon energy and an agreement was observed for the entire range of the studied energies.