Light pulse shape dependence on gamma-ray energy in CsI(Tl)
2008 (English)In: IEEE Transactions on Nuclear Science, ISSN 0018-9499, E-ISSN 1558-1578, Vol. 55, no 3, 1246-1250 p.Article in journal (Refereed) Published
A detailed study of the scintillation light pulse shape in CsI(Tl) at room temperature as a function of incoming photon energy in 6 divided by 662 keV energy range is presented. Three samples of CsI(Tl) of different amount of Tl dopant (0.01, 0.06 and 0.25 mol%) were used in measurements. A delayed coincidence single photon counting method was applied to measure the decay times in the microsecond range. Three-exponential function was fitted to the time spectra to describe the light pulse shape, which resulted in three components of tau(1) = 730 +/- 30 ns (fast), tau(2) = 3.2 +/- 0.3 mu s (slow) and tau(3) = 16 +/- 2 mu s (tail). The intensity of the second component was found to be sensibly independent of photon energy, whereas the intensities of the first and third ones varied with the energy of absorbed photon in low energy region. For a given crystal the most intense fast component was measured for 6-keV X-rays from Fe-55 at the cost of decreasing intensity of the slowest one. Furthermore, the intensity of the fast component depends on Tl concentration and reaches its maximum value for the 0.06 mol% doping, close to the well-know optimal concentration of 0.1 mol%.
Place, publisher, year, edition, pages
2008. Vol. 55, no 3, 1246-1250 p.
CsI(Tl), light pulse shape, single photon method
IdentifiersURN: urn:nbn:se:kth:diva-38092DOI: 10.1109/TNS.2008.922805ISI: 000256967800045ScopusID: 2-s2.0-45849148931OAI: oai:DiVA.org:kth-38092DiVA: diva2:436112
9th International Conference on Inorganic Scintillators and their Applications Location: Winston Salem, NC Date: JUN 04-08, 2007 2011-08-222011-08-222011-08-22Bibliographically approved