Showing papers by "Muhammad Irfan published in 1973"

TL;DR: In this article, the relative photopeak efficiencies of a 3×3″ CsI(Tl) crystal have been experimentally measured in terms of the corresponding photopeek efficiencies for the same crystal in the energy range 0.279 to 3.25 MeV and for crystal-to-source distances of 3.0 cm.