Optimization of the Scintillator Size for Positron Lifetime Measurements

16th International Conference on Positron Annihilation

Yamawaki, M.^1 ; Kobayashi, Y.^1 ; Hattori, K.^2 ; Watanabe, Y.^2

National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565 and 8568, Japan^1

TOYO SEIKO Co., Ltd, 3-195-1 Umaganji, Yatomi-cho, Aichi 490-1412, Japan^2

关键词: Accumulation time;    BaF2 scintillators;    Least squares estimation;    Measurement conditions;    On-site materials;    Positron annihilation lifetime spectroscopy;    Positron lifetime measurements;    Time resolution;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/443/1/012099/pdf
DOI  :  10.1088/1742-6596/443/1/012099

来源: IOP

【 摘 要 】

Optimization of the measurement condition for positron annihilation lifetime spectroscopy (PALS) is discussed from the viewpoint of non-destructive "on-site" material inspection. Numerical analysis based on a least-squares estimation and experiments with various sizes of BaF2scintillators by conventional PALS suggested that the use of relatively large BaF2scintillators enables on-site material inspection by PALS with reasonable accumulation time and time resolution.