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 radio-active 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.
|Number of pages
|Physica Status Solidi (C) Current Topics in Solid State Physics
|Published - 2007
|14th International Conference on Positron Annihilation, ICPA 14 - Hamilton, ON, Canada
Duration: 2006 Jul 23 → 2006 Jul 28