caa a22 4500 46573166X CHVBK 20180323111743.0 cr unu---uuuuu 170327e19900301xx s 000 0 eng 10.1007/BF02060446 doi (NATIONALLICENCE)springer-10.1007/BF02060446 Sum peak in gamma-energy spectra of NaI(T1) detectors [Elektronische Daten] [Sh. Al-Dargazelli, A. Mahmood] The factors affecting the sum peak of NaI(T1) detectors has been studied experimentally, namely the intrinsic photopeak efficiency, the geometry factor, the energy and the intensity of the incident photon beam. Several radioactive sources were used for the measurement of the intrinsic photopeak efficiency of the two NaI(T1) detectors used in this work (51 mm × 51 mm and 76 mm × 76 mm).88Y,60Co and22Na, were used for sum peak determination. Different source to detector distances, to produce different values of geometry factor, and different source activities were used. The effect of geometry on the intrinsic photopeak efficiency is very pronounced at high geometry factor. The linear relation between the relative intensity of the sum peak and both the geometry factor and the intensity of the incident photons, facilitate the quantitative prediction of the sum effect on the energy response function of NaI(T1) detectors. Akadémiai Kiadó, 1990 Al-Dargazelli Sh Physics Department, College of Science, Baghdad University, Jadriah-Baghdad, (Iraq) aut Mahmood A. Physics Department, College of Science, Baghdad University, Jadriah-Baghdad, (Iraq) aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 139/1(1990-03-01), 3-14 0236-5731 139:1<3 1990 139 10967 https://doi.org/10.1007/BF02060446 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02060446 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Al-Dargazelli Sh Physics Department, College of Science, Baghdad University, Jadriah-Baghdad, (Iraq) aut NATIONALLICENCE 700 1- Mahmood A. Physics Department, College of Science, Baghdad University, Jadriah-Baghdad, (Iraq) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 139/1(1990-03-01), 3-14 0236-5731 139:1<3 1990 139 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer