Low temperature light yield measurements in NaI and NaI(Tl)
C. Sailer, B. Lubsandorzhiev, C. Strandhagen, J. Jochum
TL;DR
This study measures the scintillation light yield of pure and Thallium-doped NaI crystals across a wide temperature range, revealing increased light output at low temperatures and providing decay time constants.
Contribution
It provides precise measurements of light yield and decay times of NaI and NaI(Tl) crystals from 1.7K to 300K, expanding understanding of their temperature-dependent scintillation properties.
Findings
Light yield increases at low temperatures for pure NaI.
NaI(Tl) shows increased light output below 60K.
Decay time constants are estimated at three temperatures.
Abstract
The scintillation light output of a pure and a Thallium doped Sodium Iodide (NaI) crystal under irradiation with 5.486MeV \alpha -particles has been measured over a temperature range from 1.7K to 300K. Estimates of the decay time constant at three selected temperatures are given. For pure NaI an increase in light yield towards low temperatures could be confirmed and measured at higher precision. For NaI(Tl) below 60K an increase in light output has been found.
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