The use of sources emitting coincident gamma-rays for the determination of photopeak and total efficiencies in non-point-source counting geometries

Blaauw, M.; Ammerlaan, M.J.J.; Gelsema, S.J.

doi:10.1016/s0168-9002(96)01161-8

Cited by 9 publications

(1 citation statement)

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“…The relative number of events expected in the sum peak depends on the decay scheme, the branching ratio of the two γ-rays, the angular correlations that may exist between them, source activity, and full energy peak efficiencies, corresponding to γ-ray energies. A complete analysis is often quite complex (see for example (Gilmore (2011); Debertin and Schötzig (1979); Helmer and Debertin (1988); Blaauw et al (1997); Sima and Arnold (2000))), but the following simplified derivations illustrate the general approach that can be applied. For the simplified decay scheme for 60 Co shown in Figure 1 we can estimate the expected number of events in the sum peak.…”

Section: Approachmentioning

confidence: 99%

Simplified Efficiency Calibration Methods for Semiconductor Detectors used in Criticality Dosimetry

Golovko

2022

Preprint

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Oversimplified" and "simplified" methods based on true coincidence summing effect used in uncomplicated determination of the photo-peak efficiency of the semiconductor High Purity Germanium (HPGe) detector system are suggested and verified. The methods and calibrated 60 Co radioactive source may be used to commission any HPGe detector to use during potential criticality event. The determined accuracy of the semiconductor HPGe detector system using this method is a few percent (for the detector system used in this study it was 8% for oversimplified and 5% for simplified methods accordingly) reasonable, expected, and good enough to use for estimation of neutron dose from irradiated human blood in a potential criticality event. Moreover, if one can experimentally deduce the photo-peak efficiency for 60 Co 1333 keV γ-ray line using the suggested methods, then with a few percent accuracy this efficiency could be also used for 1369 keV γ-ray line in the decay of 24 Na isotope.

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Section: Approachmentioning

confidence: 99%