Measurement of energy spectrum of slow positrons  emitted from tungsten

Weng Huimin    1; 2      Han Rongdian    1      Qin Gan    1    1

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Measurement of energy spectrum of slow positrons emitted from tungsten

更新时间：2021-04-09

- Measurement of energy spectrum of slow positrons emitted from tungsten
- NUCLEAR TECHNIQUES Issue 4, (1997)
- 作者机构：
  
  1. 中国科学技术大学
  2. 中国科学技术大学结构分析开放实验室
  3. 中国科学技术大学中国科学技术大学结构分析开放实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TL375.17
- Published：01 April 1997
- 稿件说明：
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[1]翁惠民,韩荣典,秦敢.钨发射慢正电子能谱测量[J].核技术,1997(04):2-5.

Weng Huimin 1, 2 Han Rongdian 1 Qin Gan 1 1. Measurement of energy spectrum of slow positrons emitted from tungsten[J]. Nuclear techniques, 1997, (4).
[1]翁惠民,韩荣典,秦敢.钨发射慢正电子能谱测量[J].核技术,1997(04):2-5. DOI：

Weng Huimin 1, 2 Han Rongdian 1 Qin Gan 1 1. Measurement of energy spectrum of slow positrons emitted from tungsten[J]. Nuclear techniques, 1997, (4). DOI：

摘要

２２Ｎａ发射的正电子照射在经过２２００℃、１５ｍｉｎ退火的多晶钨箔上慢化并收集成慢正电子束，用平面减速栅能量分析器和通道电子倍增器测量能谱。测得在１３３μＰａ的环境中，钨发射的慢正电子的能量峰位在１．７ｅＶ，自然宽度（ＦＷＨＭ）＜１．５ｅＶ。

Abstract

The energy of slow positrons has been measured with a plane retarding grid energy analyser and a channel electron multiplier. It is found that the energy peak of slow positrons emitted from a tungsten foil after annealed at 2200℃ for 15 minutes is 1.7eV and energy spread （FWHM） is less than 1.5eV.

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中国科学院高能物理研究所

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