Study on mechanism of green luminescence in PbWO<sub>4</sub> crystal by positron annihilation lifetime spectrum

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Study on mechanism of green luminescence in PbWO₄ crystal by positron annihilation lifetime spectrum

更新时间：2021-03-12

- Study on mechanism of green luminescence in PbWO₄ crystal by positron annihilation lifetime spectrum
- NUCLEAR TECHNIQUES Issue 7, (2000)
- 作者机构：
  
  1. 同济大学,上海,200092
  2. 中国科学院无机功能材料开放实验室,上海,200050
  3. 中
- 作者简介：
- 基金信息：
  
  国家自然科学基金!19774043;上海市高等学校科学技术发展基金;上海市教育委员会重点学科研究计划资助;中国科学院无机功能材料开放实验
- DOI：
  CLC： O77
- Published：01 July 2000
- 稿件说明：
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[1]祁金林,顾牡,汤学峰,童宏勇,郑万辉,陈玲燕,廖晶莹,沈炳孚,曲向东,沈定中,李培俊,殷之文,王景成,徐炜新.用正电子湮没实验研究PbWO_4新型闪烁晶体绿光发光机理[J].核技术,2000(07):433-436.

Study on mechanism of green luminescence in PbWO₄ crystal by positron annihilation lifetime spectrum[J]. Nuclear techniques, 2000, (7): 433-436.
[1]祁金林,顾牡,汤学峰,童宏勇,郑万辉,陈玲燕,廖晶莹,沈炳孚,曲向东,沈定中,李培俊,殷之文,王景成,徐炜新.用正电子湮没实验研究PbWO_4新型闪烁晶体绿光发光机理[J].核技术,2000(07):433-436. DOI：

Study on mechanism of green luminescence in PbWO₄ crystal by positron annihilation lifetime spectrum[J]. Nuclear techniques, 2000, (7): 433-436. DOI：

摘要

通过正电子湮没寿命谱研究了PbWO

晶体退火处理前后缺陷的变化；发现氧退火后，晶体正电子寿命值τ

变小，正电子捕获率κ增大，真空退火反之。并且PbWO

晶体氧退火后发光主峰位从440nm移到485nm的绿光处，而真空退火晶体发射谱谱形并未变化。从不同退火处理对晶体的影响，提出了PbWO

晶体中铅空位形成WO

＋O

发绿光的发光模型。

Abstract

The change of the defects in PbWO4 crystals before and after annealing was studied by positron annihilation lifetime spectrum. It was found that the lifetime τ

turned short and the positron capture ability K increased after oxygen annealing.The results for the case of vacuum annealing were the reverse for that of oxygen annealing. Meanwhile

the main emission peak of the crystal after oxygen annealing shifted from 440nm to 485nm

but the peak for the case of vacuum annealing remained at 440nm

i.e. similar to that of an untreated crystal. From the results affected by different treatments

it is proposed that WO

+O- produced by lead vacancy leads to the green luminescence in PbWO4 crystal.

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Study on mechanism of green luminescence in PbWO4 crystal by positron annihilation lifetime spectrum

DOI：

摘要

Abstract

关键词

Keywords

references

Study on mechanism of green luminescence in PbWO₄ crystal by positron annihilation lifetime spectrum