Experimental peak/total ratios for a few NaI(Tl) crystal sizes

Study of mathematical functions to fit detector efficiency curve in gamma ray energy range from 59.54 keV up to 1408.01 keV

“…The ex per i men tal method is con sid ered to be the sim plest and most di rect, al though it is time-con sum ing [1,2]. Al though ex per i men tal meth ods can of fer good re sults with very low un cer tain ties, some lim i ta tions can lead to er rors in the fi nal choice of the gamma ray de tec tor full-en ergy peak ef fi ciency [3,7]. The sources of er rors can be from: vari a tion of the gamma emis sion prob a bil ity used by dif fer ent sci en tists and tech ni cians, the co in ci dence sum ming prob lems, the use of sev eral stan dard ra dio ac tive sources to cover dis crete en ergy re gions, which may lead to the ap pear ance of en ergy gaps, gen er at ing huge un cer tain ties af ter fin ish ing the in ter po la tions dur ing the curve fit ting and con sid er ing the in trin sic rather than to tal ef fi ciency [8,9].…”