QCYK Reference material - 700 to 1200 keV

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This spectrum was measured using a 45% n-type detector, mounted in a standard 10cm thick cylindrical graded shield. The source was the QCYK reference material evaporated onto a 5 cm diameter filter paper placed, within a polystyrene counting container, at the centre of the detector face. Such a counting position invites true coincidence summing! In this particular spectrum, there appears to be summing with the germanium escaped X-rays.

Measured
Energy
(keV)
True
energy
(keV)
Relative
Count
rate
NuclideDK
Mode
AttributionEm.
Prob.
(%)
1813.96814.0520.31188YECDEP
2834.85834.83816.94654MnECFEP99.9746
3898.04898.03621.80288YECFEP93.9
4902.4902.2450.20888YECKa2 sum Ge esc
902.312288YECKa1 sum Ge esc
5912.44912.1341.41788YECKa2 sum
912.201288YECKa1 sum
61115.551115.53912.98565ZnECFEP50.6
71123.761123.5790.10465ZnECKa sum
1124.47965ZnECKb sum
81136.381137.52960.05465ZnECRandom sum Ag-Ka?
91173.251173.22813.83360Cob-FEP99.85

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