Quality control of gamma counters. I. Experimental evaluation of sources of error
Lubran, M.M.
Annals of Clinical and Laboratory Science 7(1): 57-67
1977
ISSN/ISBN: 0091-7370 PMID: 836003 Document Number: 117664
Errors of counting rate as large as 2 percent may occur through variations in instrumental parameters during the measurement of I-125 activity using a gamma counter. Much larger errors result from failure to maintain constant sample geometry; in particular, the slope of calibration curves depends on sample volume.