Positron annihilation characteristics measurement system and method for measuring positron annihilation characteristics

A positron annihilation characteristics measurement method for measuring annihilation characteristics of a positron that is injected into a measured sample and is annihilated in the measured sample, comprising:

• a step of disposing a positron source at a position where the positron source is close to or adhered to a surface of the measured sample, and disposing a positron detector in such manner that the positron source is placed between the measured sample and the positron detector;
• a detection step of detecting, by radiation detecting means, a radiation emitted when the positron generated by the positron source is annihilated, alter the positron source and the positron detector are disposed relative to the measured sample, and detecting, by the positron detector, the positron that is not injected into the measured sample after being generated by the positron source;
• and
• a calculation step of calculating annihilation characteristics of the positron in the measured sample based on a detection result obtained by the radiation detection means and a detection result obtained by the positron detector in the detection step,
• wherein the calculation step calculates the annihilation characteristics of the positron in the measured sample after eliminating radiation that is detected by the radiation detection means and is expected to be emitted when the positron detected by the positron detector is annihilated.