A digital positron lifetime spectrometer for the measurements of 2 GBq level radioactive materials has been constructed and successfully tested. The equipment consists of a state-of-the-art digital oscilloscope and three movable scintillation detectors operating in triple-coincidence mode. The time resolution of 188 ps full-width at half-maximum (FWHM) is achieved for the positron lifetime measurements of radioactive specimens. Also by comparison of measurements of well-known material with and without high 60Co background radiation the ability to measure radioactive specimens is proved. In this paper the performance, construction, installation, optimization and calibration of the setup is reported.
|Journal||Physica Status Solidi (C)|
|State||Published - 9 Aug 2007|
|Event||The XIVth International Conference on Positron Annihilation - McMaster University, Hamilton|
Duration: 23 Jul 2006 → 28 Jul 2006