Accurate integral counting using multi-channel analyzers. (May 2020)

• Record Type: Journal Article
• Authors: Fitzgerald, Ryan; King, Lynne
• Is Part Of: Applied radiation and isotopes. Volume 159(2020:May)
• Publication Date: 2020-05
• Subjects: Integral counting -- Dead time -- Multi-channel analyzer -- MCA -- Radionuclide metrology; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2020.109101
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: Many techniques in radionuclide metrology rely on accurate measurement of the total count rate, that is integral counting, from a detector. We present the design and results from integral counting using a live-timed multi-channel analyzer (MCA) based on a list-mode digitizer and a live-timed scalar, both with imposed, extending dead times. These systems were benchmarked against an existing NIST anti-coincidence counting system. Both systems were used to determine correction factors to an MCA that uses Gedcke-Hale dead-time corrections. Tests were performed for a large-area gas-flow proportional counter and a NaI(Tl) detector for count rates up to 80 000 s −1 . The results were used to create correction factors suitable for alpha- and beta-particle emission rate calibrations. Highlights: Validated simple live-timed counting module with imposed extending dead-time. Created and tested an MCA using a digitizer and imposed extending dead-time. Measured correction factors to Gedcke-Hale-based MCA for integral counting.