Patent ID: 8785875
Filing Date: 2014-07-22
Classification: G01T

Abstract:
1. A positron annihilation characteristics measurement system for measuring annihilation characteristics of a positron that is injected into a measured sample and is annihilated in the measured sample, the system comprising: a positron source disposed at a position where the positron source is close to or adhered to a surface of the measured sample; a first radiation detector that detects radiation emitted when the positron generated by the positron source is annihilated; a positron detector that detects a positron that is not injected into the measured sample after being generated by the positron source; and an arithmetic device that calculates annihilation characteristics of the positron in the measured sample based on a detection result obtained by the first radiation detector and a detection result obtained by the positron detector, wherein the positron source is disposed between the measured sample and the positron detector, and the arithmetic device calculates the annihilation characteristics of the positron in the measured sample after eliminating a radiation that is detected by the first radiation detector and is expected to be emitted when the positron detected by the positron detector is annihilated.