Title :
The effect of different factors on the nonproportionality of the light yield of scintillators
Author :
Zagarij, L.B. ; Vidaj, Y.T.
Author_Institution :
Inst. for Single Crystals, Acad. of Sci., Kharkov, Ukraine
Abstract :
We have studied the effect of different factors on the nonproportionality of the light yield (L) for a number of inorganic and organic scintillators. The measurements were made in photon energy range from 6 to 88 keV. Unlike the CsI(Tl) scintillators the (E) strong dependence of nonproportionality of light yield on activator concentration (A) was found for NaI(Tl) scintillators at A less then 0.05 wt.%. It was shown that scintillation efficiency, L/E, for NaI(Tl) is extremely sensitive to the activator concentration, surface condition, temperature treatment at the energy close to the L-absorption edge of the iodine atom. For NaI(Tl) a decrease of L/E has been observed by 30-35% of the maximum at an activator concentration of about 0.01 wt.%. For comparison the results of studies of scintillation efficiency as a function of photon energy for CaF2(Eu) crystals as well as for organic scintillation crystals, such as paraterphenyl, anthracene and stilbene are presented
Keywords :
photoluminescence; scintillation; solid scintillation detectors; 6 to 88 keV; CaF2(Eu); CaF2:Eu; L-absorption edge; NaI(Tl); NaI:Tl; activator concentration; anthracene; inorganic scintillators; light yield nonproportionality; organic scintillators; paraterphenyl; scintillation efficiency; stilbene; temperature; Absorption; Atomic measurements; Energy measurement; Optical noise; Photonic crystals; Radioactive decay; Spectroscopy; Surface treatment; Temperature sensors; Windows;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-3180-X
DOI :
10.1109/NSSMIC.1995.510382
