dorsal/arxiv
View SchemaTemperature behavior of NaI (Tl) scintillation detectors
| Authors | K. D. Ianakiev, B. S. Alexandrov, P. B. Littlewood, M. C. Browne |
|---|---|
| Categories | |
| ArXiv ID | physics/0605248 |
| URL | https://arxiv.org/abs/physics/0605248 |
| DOI | 10.1016/j.nima.2009.02.019 |
| Journal | Nucl.Instrum.Meth.A607:432-438,2009 |
Abstract
It is a familiar fact that the total measured light yield of NaI (Tl) detectors is a nonlinear function of temperature. Here we present new experimental data for the temperature behavior of doped NaI(Tl) scintillators that instead shows a linear dependence of light output over a wide temperature range- including that for outdoor applications. The shape of the light pulse shows in general two decay processes: a single dominant process above room temperature and two decay time constants below. We show that redistribution of the intensities is temperature-dependent; the second (slow) decay component is negligible at room temperatures, but, by -20C, it contributes up to 40 percents of the total light and has a duration of several microseconds. We discuss the profound effect this new understanding of the light output has on the pulse height analysis instrumentation. We introduce a theoretical model to explain the experimental results. In addition, we describe a unique technique for correcting both amplitude and shape temperature changes inside the NaI(Tl) detector package.
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"abstract": "It is a familiar fact that the total measured light yield of NaI (Tl)\ndetectors is a nonlinear function of temperature. Here we present new\nexperimental data for the temperature behavior of doped NaI(Tl) scintillators\nthat instead shows a linear dependence of light output over a wide temperature\nrange- including that for outdoor applications. The shape of the light pulse\nshows in general two decay processes: a single dominant process above room\ntemperature and two decay time constants below. We show that redistribution of\nthe intensities is temperature-dependent; the second (slow) decay component is\nnegligible at room temperatures, but, by -20C, it contributes up to 40 percents\nof the total light and has a duration of several microseconds. We discuss the\nprofound effect this new understanding of the light output has on the pulse\nheight analysis instrumentation. We introduce a theoretical model to explain\nthe experimental results. In addition, we describe a unique technique for\ncorrecting both amplitude and shape temperature changes inside the NaI(Tl)\ndetector package.",
"arxiv_id": "physics/0605248",
"authors": [
"K. D. Ianakiev",
"B. S. Alexandrov",
"P. B. Littlewood",
"M. C. Browne"
],
"categories": [
"physics.ins-det"
],
"doi": "10.1016/j.nima.2009.02.019",
"journal_ref": "Nucl.Instrum.Meth.A607:432-438,2009",
"title": "Temperature behavior of NaI (Tl) scintillation detectors",
"url": "https://arxiv.org/abs/physics/0605248"
},
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