Growth and Scintillation Properties of Zinc and Thallium-codoped Sodium Iodide Crystals

TIAN Dongsheng; ZHANG Bin; YIN Zurong; LI Maolin; XU Wusheng; ZHANG Zhenxi; JIA Yongchao; XU Zhaopeng

doi:10.37188/CJL.20230171

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Growth and Scintillation Properties of Zinc and Thallium-codoped Sodium Iodide Crystals

Synthesis and Properties of Materials | 更新时间：2023-11-01

- Growth and Scintillation Properties of Zinc and Thallium-codoped Sodium Iodide Crystals
  增强出版
- Chinese Journal of Luminescence Vol. 44, Issue 10, Pages: 1797-1802(2023)
- 作者机构：
  
  1.燕山大学信息科学与工程学院，河北省特种光纤与光纤传感实验室，河北秦皇岛　066004
  2.燕山大学理学院河北省微结构材料物理重点实验室，河北秦皇岛　066004
  3.秦皇岛本征晶体科技有限公司，河北秦皇岛　066000
  4.燕山大学环境与化学工程学院，河北秦皇岛　066004
- 作者简介：
- 基金信息：
  
  The Central Guidance on Local Science and Technology Development Fund of Hebei Province(206Z1101G);Science and Technology Development Program of Qinhuangdao City(202003B008);Innovation Capability Improvement Project of Hebei province(22567605H);Natural Science Foundation of Hebei Province(E2021203126;C20220329);Cultivation Project for Basic Research and Innovation of Yanshan University(2021LGQN033)
- DOI：10.37188/CJL.20230171
  CLC： O482.31
- Published：05 October 2023，
  
  Received：25 July 2023，
  
  Revised：10 August 2023，
- 稿件说明：
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田东升,张斌,尹祖荣等.锌铊共掺碘化钠晶体的生长及闪烁性能[J].发光学报,2023,44(10):1797-1802.

TIAN Dongsheng,ZHANG Bin,YIN Zurong,et al.Growth and Scintillation Properties of Zinc and Thallium-codoped Sodium Iodide Crystals[J].Chinese Journal of Luminescence,2023,44(10):1797-1802.
田东升,张斌,尹祖荣等.锌铊共掺碘化钠晶体的生长及闪烁性能[J].发光学报,2023,44(10):1797-1802. DOI： 10.37188/CJL.20230171.

TIAN Dongsheng,ZHANG Bin,YIN Zurong,et al.Growth and Scintillation Properties of Zinc and Thallium-codoped Sodium Iodide Crystals[J].Chinese Journal of Luminescence,2023,44(10):1797-1802. DOI： 10.37188/CJL.20230171.

摘要

采用坩埚下降法生长了NaI∶Zn（0，0.05%，0.08%，0.4%），Tl（0.18%）晶体。对晶体样品进行了X射线粉末衍射、电感耦合等离子体发射光谱以及紫外可见近红外透射光谱测试。结果表明，生长的晶体具有单一的物相，Zn和Tl离子掺杂并没有改变NaI的晶体结构；随着Zn掺杂浓度的增加，晶体内的Zn

离子浓度增加、Tl

离子浓度下降；晶体透过率随Zn掺杂浓度的增加呈现先增大后减小的趋势，Zn掺杂浓度为0.08%时，样品的透过率最高，且所有样品在350~700 nm波段的透过率均高于70%。经过切割、打磨、抛光、封装等工序将NaI∶Zn，Tl晶体封装成辐射探测元件。闪烁性能测试结果表明，在

137

Cs放射源激发下，Zn掺量为0.05%、0.08%时的NaI∶Zn，Tl晶体的能量分辨率≤6.80%，光输出相对于NaI∶Tl晶体增加6%~10%，这有利于NaI晶体在高能粒子探测领域的进一步应用。

Abstract

NaI∶Zn（0， 0.05%， 0.08%， 0.4%），Tl（0.18%） crystals were grown using Bridgman method respectively. The crystal samples were tested by X-ray powder diffraction， inductively coupled plasma emission spectra， and ultraviolet-visible near-infrared transmission spectra. The results show that the grown crystals have a single phase， and the crystal structure of NaI does not change with Zn and Tl ions doping. As the doping concentration of Zn increases， the concentration of Zn

ions in the crystal increases， while the concentration of Tl

ions decreases. The transmittance shows a trend of firstly increasing and then decreasing with the increase of Zn doping concentration. When the doping concentration of Zn is 0.08%， the transmittance of the sample is the highest. The transmittance of all the NaI∶Zn，Tl crystals is higher than 70% in the 350-700 nm wavelength range. After cutting， polishing， and packaging processes， NaI∶Zn，Tl crystals were enveloped into radiation detection components. The scintillation performance test results showed that under the excitation of a

137

Cs radiation source， the energy resolution of NaI∶Zn，Tl crystals with Zn doping of 0.05% and 0.08% were less than 6.80%， and the light output increased 6%-10% compared with that of NaI∶Tl crystal. This is conducive to the further application of NaI crystals in the field of high-energy particle detection.

关键词

碘化钠晶体Zn掺杂坩埚下降法晶体生长透过率能量分辨率相对光输出

Keywords

sodium iodide crystalZn2+ dopedBridgman methodcrystal growthtransmittanceenergy resolutionrelative light output

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