QCYK Reference material - 200 to 700 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
AttributionEmmission
Probability
(%)
1203.780.23??
2238.45238.630.053212Pbb-FEP - Background
3255.11255.1340.742113SnECFEP2.11
4279.17279.195214.135203Hgb-FEP81.48
5310.11310.4920.03960Cob-DEP
6352351.930.036b-FEP - Background
7391.65391.69817.961113SnECFEP64.94
8510.645110.79265ZnECAnn2.84
9513.96514.004819.27185SrECFEP98.5
10517.24517.45170.13985SrECKa1 sum Ge esc
11527.1527.34070.86385SrECKa2 sum
527.400385SrECKa1 sum
12583.59583.170.031208Tlb-FEP - Background
13661.64661.65718.638137Csb-FEP84.99

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