Scintillation and mechanical properties of CsI(Tl,Br) crystals pulled frommelt

Scintillation and mechanical characteristics of combined CsI(T1)-CsBr cryst als have been studied over the concentration range of cesium bromide 0.1-2. 7 mass%. In this concentration range, cesium bromide addition has been show n to have no effect on the spectrometric and temporal characteristics of cr ystals or on their radiation resistance but leads to their significant stre ngthening. These improved mechanical properties prevent the deformation of large ingots during their pulling from melt onto the seed. The quality of m echanical treatment of the surface of these alloy crystals has a weaker dep endence on the crystallographic orientation of the surfaces, thus simplifyi ng the manufacture of scintillators of intricate geometric forms. (C) 2001 Elsevier Science B.V. All rights reserved.