In-situ positron lifetime spectroscopy of radiation damage by simultaneous irradiation of slow-positron and ion beams

16th International Conference on Positron Annihilation

Kinomura, A.^1 ; Suzuki, R.^1 ; Ohdaira, T.^1 ; Oshima, N.^1 ; O'Rourke, B.E.^1 ; Nishijima, T.^1

National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan^1

关键词: Analysis system;    Electron linear accelerator;    Ion beam irradiation;    Positron annihilation lifetime spectroscopy;    Positron diffusion;    Positron lifetime spectroscopy;    Simultaneous irradiation;    Slow positron beam;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/443/1/012043/pdf
DOI  :  10.1088/1742-6596/443/1/012043

来源: IOP

【 摘 要 】

An in-situ positron analysis system has been developed for positron annihilation lifetime spectroscopy during ion beam irradiation. An electron linear accelerator was used to produce a slow positron beam for this system. Positron lifetime spectroscopy of SiO2/Si and annealed pure Fe samples was successfully demonstrated during simultaneous irradiation with a 150 keV Ar+beam. The lifetime spectra changed with increasing ion dose, indicating a decrease in ortho-positronium intensity (SiO2) and the decrease in positron diffusion length (Fe).