Application of positron beam Doppler broadening technique to ion beam irradiation in nickel
Application of positron beam Doppler broadening technique to ion beam irradiation in nickel
复制标题
DOI：
10.1016/j.jnucmat.2007.03.126
复制
发表时间：
2007-08
影响因子：
3.1
通讯作者：
T. Iwai;H. Tsuchida;M. Awano
中科院分区：
文献类型：
--
作者：
T. Iwai;H. Tsuchida;M. Awano
采用变能量正电子束多普勒展宽技术研究了镍离子辐照引起的空位型缺陷的形成过程，为原位正电子束实验寻找合适的实验条件。300-343K镍离子辐照诱导S参数升高，但S参数对正电子能量的依赖与冷轧镍非常相似，这表明正电子被SFTs等小空位型缺陷捕获。原位正电子束多普勒实验研究腔形核过程的最佳实验条件为773K时0.1 ~ 0.4dpa左右。
The formation processes of vacancy-type defects induced by ion irradiation in nickel were investigated with a variable-energy positron beam Doppler broadening technique in order to find the appropriate experimental condition for in situ positron beam experiments. Nickel ion irradiation at 300–343K induces an S parameter increase, but the dependence of the S parameter on positron energy is very similar to that of cold-rolled nickel, which suggests positron trapping by small vacancy-type defects such as SFTs. The best experimental condition for investigation of cavity nucleation process by in situ positron beam Doppler experiments is suggested to be around 0.1–0.4dpa at 773K.