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：
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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,2+,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,2+, 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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