Comparative investigation of the performance of ZnO-based scintillators for use as α-particle detectors
Comparative investigation of the performance of ZnO-based scintillators for use as α-particle detectors
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DOI：
10.1016/j.nima.2006.09.041
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发表时间：
2006-12-01
影响因子：
1.4
通讯作者：
Bourret-Courchesne, E. D.
中科院分区：
文献类型：
--
作者：
Neal, J. S.;Boatner, L. A.;Bourret-Courchesne, E. D.
作为对氧化锌基闪烁体闪烁特性全面研究的一部分，四个镓掺杂氧化锌（ZnO）粉末样品已通过X射线激发、α粒子激发以及与温度相关的光致发光（PL）进行了表征。这些研究的最终目标首先是了解在ZnO闪烁体家族的各个成员中起作用的闪烁机制，进而利用这一知识来提高ZnO的辐射探测性能。这些样品已被考虑用于安装在氘 - 氚（D - T）中子发生器中的α探测器。所有样品都显示出主要衰减时间分量约为1纳秒。对四个粉末样品的光致发光测量并不能明确支持所讨论的任何一种模型。然而，激子和浅受主模型为未来的研究提供了一个共同的起点。就快速光输出而言，劳伦斯伯克利国家实验室（LBNL）3518样品被发现是最有希望替代核企业技术公司的样品用于ZnO:Ga基α粒子探测器的候选者。虽然发光中心的性质或实际负责闪烁的能量转移机制尚未完全清楚，但ZnO:Ga仍然是用于安装在D - T中子发生器中的α探测器的非常理想的候选闪烁体，并且对ZnO:Ga闪烁体中起作用的基本机制和闪烁参数的深入研究仍在继续。（c）2006爱思唯尔公司。版权所有。
As part of a comprehensive investigation of the scintillation properties of zinc-oxide-based scintillators, four samples of gallium-doped zinc oxide (ZnO) powders-have been characterized by means of X-ray excitation, a-particle excitation, and temperature-dependent photolurninescence (PL). The ultimate goals of these studies are, first, to understand the scintillation mechanisms that are operative in various members of the ZnO family of scintillators, and, subsequently, to use this knowledge in order to improve the radiation-detection performance of ZnO. These samples have been considered for use in an alpha-detector for installation in a deuterium-tritium (D-T) neutron generator. All of the samples demonstrated principal decay time components on the order of 1 ns. PL measurements of the four powder samples did not unequivocally support any of the discussed models. Excitonic and shallow acceptor models, however, share a common starting point for future investigations. The Lawrence Berkeley National Laboratory (LBNL) 3518 sample was found to be the most promising candidate, in terms of fast light output, for replacing the Nuclear Enterprises Technology sample for use in a ZnO:Ga-based a-particle detector. While the nature of the luminescence center(s) or the energy transfer mechanisms actually responsible for scintillation are not yet clearly understood, ZnO:Ga remains a highly desirable candidate scintillator for use in an a-detector for installation in a D-T neutron generator and extended investigations of the fundamental mechanisms and scintillation parameters that are operative in ZnO:Ga scintillators are continuing. (c) 2006 Elsevier B.V. All rights reserved.