DEVICE AND METHOD FOR MEASURING POSITRON LIFETIME

摘要

PROBLEM TO BE SOLVED: To provide a device capable of measuring a positron lifetime by separating a positron beam source from a measuring sample, and having a half value width of a time resolution below 180 ps, and to provide a method of measuring the same.;SOLUTION: The device includes a positron beam source, a light detection device arranged in the state sandwiching the measuring sample between itself and the positron beam source, and a γ-ray detection device for detecting γ-rays generated when positrons entering the measuring sample from the positron beam source are annihilated in the measuring sample. The light detection device is characterized by detecting Cherenkov light generated when the positrons enter the measuring sample from the positron beam source.;COPYRIGHT: (C)2007,JPO&INPIT