QCYK Reference material - 1200 to 2000 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!

Measured
Energy
(keV)
True
energy
(keV)
Relative
Count
rate
NuclideDK
Mode
AttributionEmission
Probability
(%)
11324.851325.0520.42488YECSEP
21332.521332.49212.42460Cob-FEP99.9826
31353.581354.48260.03260Cob-Random sum Ag-Ka?
41460.914600.04640Kb-FEP - Background
51836.061836.05212.70388YECFEP99.38
61840.351840.2610.14188YECKa2 sum Ge esc
1840.328288YECKa1 sum Ge esc
71850.41850.150.7488YECKa2 sum
1850.217288YECKa1 sum

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