Temperature behavior of NaI(Tl) scintillation detectors

被引：62

作者：

Ianakiev, K. D. ^{[1
]}

Alexandrov, B. S. ^{[1
,2
]}

Littlewood, P. B. ^{[3
]}

Browne, M. C. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Univ New Mexico, Albuquerque, NM 87131 USA

[3] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2009年 / 607卷 / 02期

关键词：

NaI(Tl); Inorganic scintillators; Two decay components; Temperature dependence; Light yield; Linear dependence of light output; Temperature redistribution; Light pulse; Temperature-dependent shape; Step response; Rise-time compensation; MODEL;

D O I：

10.1016/j.nima.2009.02.019

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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 the 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 (one decay-time constant) above the room temperature and two processes (two decay-time constants) below the room temperature. We show that the redistribution of the intensities between the two processes is temperature dependent: the second (slow) decay component is negligible at room temperatures, but by -20 degrees C, it contributes up to 40% 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. Published by Elsevier B.V.

引用

页码：432 / 438

页数：7

共 22 条

[11]

IANAKIEV K, COMMUNICATION

[12]

IANAKIEV KD, 2005, Patent No. 7081626

[13]

Knoll G.F., 1999, RAD DETECTION MEASUR

[14]

MELCHER CL, 1988, IEEE T NUCL SCI, V35

[15]

MOTT NF, 1939, T FARADAY SOC, V35

[16]

MURRAY RB, 1975, IEEE T NUCL SCI, V22

[17]

NISHIMURA H, 1988, J LUMIN, V4041, P429

[18]

ROZSA C, 1999, BICR NEWB NUCL SCI S

[19]

SCHWEITZER JS, 1983, IEEE T NUCL SCI, V30

[20]

VALENTINE J, 1993, NUCL INSTRUM METH A, V325

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