caa a22 4500 397502338 CHVBK 20180308164535.0 cr unu---uuuuu 161202e19950801xx s 000 0 eng 10.1093/oxfordjournals.rpd.a082771 doi 0144-8420 pii (NATIONALLICENCE)oxford-10.1093/oxfordjournals.rpd.a082771 Effect of Radionuclide Distributions on Lung Counting Efficiency [Elektronische Daten] [G.H. Kramer, L.C. Burns] The Human Monitoring Laboratory which acts as Canada's National Calibration Reference Centre of in vivo monitoring, recently acquired a new lung counting system comprised of four 70 mm diameter and 30 mm thick germanium detectors. Prior to purchasing the system, calibrations were performed with an identical evaluation detector. The work was carried out using activity homogeneously distributed in lung sets which were placed in the torso phantom that was originally developed at Lawrence Livermore National Laboratory, USA. Results of the cross-talk and heterogeneously loaded lungs indicated that detectors used for low energy photon emitters should be calibrated individually instead of as an array, as is often the case. It was clear that no activity, particularly at 17keV (239Pu), contributed to the counts of a detector which was not directly above this activity and that to use a summed array of detectors with a distributed source (i.e. two lungs) could lead to some very large errors. Radiation Protection Dosimetry Kramer G.H. aut Burns L.C. aut Radiation Protection Dosimetry Oxford University Press 61/1-3(1995-08-01), 145-147 0144-8420 61:1-3<145 1995 61 rpd https://doi.org/10.1093/oxfordjournals.rpd.a082771 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/oxfordjournals.rpd.a082771 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kramer G.H. aut NATIONALLICENCE 700 1- Burns L.C. aut NATIONALLICENCE 773 0- Radiation Protection Dosimetry Oxford University Press 61/1-3(1995-08-01), 145-147 0144-8420 61:1-3<145 1995 61 rpd Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford