Non-proportionality and Energy Resolution of CsI(Tl)

Non-proportionality and Energy Resolution of NaI(Tl) at Wide Temperature Range (-40°C to +23°C)

“…It is worthy to note that a better non-proportionality for a long peaking time is measured, when all the light of the light pulse is collected. A similar effect is reported in [5] for CsI(Tl) crystals at room temperature. A shorter peaking time integrates the light corresponding to a fast component of the light pulse only, which leads to a deterioration of non-proportionality.…”

“…According to [1], the decay time constant of the slow component is growing up to 1.6 μs and its intensity up to about 60% at -30ºC. The increase of long decay mode intensity in a cooled down NaI(Tl) makes it behave the way CsI(Tl) does at room temperature [5]. We see that a 12 μs peaking time is not sufficient anymore after decreasing temperature below -20ºC, and the longer peaking of 48 μs allows us to collect more light (Fig.…”

“…[3] and ZnSe(Te) [4]. It is also the subject of the recent study of the non-proportionality and energy resolution of CsI(Tl) crystals [5].…”

Energy resolution of CsI(Na) scintillators

“…This was observed for such scintillators like CsI(Tl) (Moszyń ski et al, 1999;Fiorini et al, 1997), ZnSe(Te) (Balcerzyk et al, 2002), undoped NaI crystal at liquid nitrogen temperature (Moszyń ski et al, 2003), and NaI(Tl) in temperatures reduced below 0 C (Swiderski et al, 2007). It was also a subject of profound studies of the non-proportional response and energy resolution of CsI(Tl) crystals with different Tl concentrations (Syntfeld-Ka _ zuch, et al, 2007). CsI(Na) scintillators also exhibit multi-exponential light pulse shape.…”

“…Methods of measurements follow that applied to CsI doped with Tl (the same host crystal and different dopants, see Syntfeld-Ka _ zuch, et al (2007)). Additionally, the results for CsI(Na) are compared to that obtained previously for commonly used NaI(Tl) scintillator.…”