核材料中氦含量的重离子弹性反冲探测

Elastic Recoil Detection of Helium Content in Nuclear Material by Heavy Ion

核反应堆材料中氦的滞留量是评估材料安全性能的重要指标。文中介绍了利用重离子束的弹性反冲探测氦的能谱、分析薄膜材料中的氦元素含量及其深度分布的基本原理和实验方法。采用12 MeV的碳离子作为探针,对金属锆膜中的氦进行前向弹性反冲;通过解析能谱,获得氦的含量分布和深度分布,并对不同温度退火后的薄膜材料中氦含量进行了对比分析。

The retention capacity of helium in reactor materials is one of the key factors to assess their safety performance.In this paper,the basic principle and experimental method of elastic recoil detection(ERD) analysis were presented that the energy spectra of helium can been obtained by elastic recoil detection of ion beam.And the analysis of helium content and depth distribution in thin film can been achieved.With 12MeV carbon ion as a probe,helium in zirconium film was elastically recoiled forward.The content and depth distribution of helium were obtained by analyzing the energy spectra.The helium content of film material annealed at different temperatures was detected for comparison.