synonym: positron annihilation lifetime spectrometry (PALS)
initialism: PLS
https://doi.org/10.1351/goldbook.08752
Measurement method of positron annihilation analysis in which the time interval between the emission of positrons from a radioactive source and the detection of gamma rays due to the annihilation of these positrons with electrons from the surrounding matter is the lifetime of the positron or positronium.