QCYK Reference material - 200 to 700 keVHome Page | Examples | 0 to 200 keV | 700 to 1200 keV | 1200 to 2000 keV | Calibrations
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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!
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| Measured Energy (keV) | True energy (keV) | Relative Count rate | Nuclide | DK Mode | Attribution | Emmission Probability (%) | |
| 1 | 203.78 | 0.23 | ?? | ||||
| 2 | 238.45 | 238.63 | 0.053 | 212Pb | b- | FEP - Background | |
| 3 | 255.11 | 255.134 | 0.742 | 113Sn | EC | FEP | 2.11 |
| 4 | 279.17 | 279.1952 | 14.135 | 203Hg | b- | FEP | 81.48 |
| 5 | 310.11 | 310.492 | 0.039 | 60Co | b- | DEP | |
| 6 | 352 | 351.93 | 0.036 | b- | FEP - Background | ||
| 7 | 391.65 | 391.698 | 17.961 | 113Sn | EC | FEP | 64.94 |
| 8 | 510.64 | 511 | 0.792 | 65Zn | EC | Ann | 2.84 |
| 9 | 513.96 | 514.0048 | 19.271 | 85Sr | EC | FEP | 98.5 |
| 10 | 517.24 | 517.4517 | 0.139 | 85Sr | EC | Ka1 sum Ge esc | |
| 11 | 527.1 | 527.3407 | 0.863 | 85Sr | EC | Ka2 sum | |
| 527.4003 | 85Sr | EC | Ka1 sum | ||||
| 12 | 583.59 | 583.17 | 0.031 | 208Tl | b- | FEP - Background | |
| 13 | 661.64 | 661.657 | 18.638 | 137Cs | b- | FEP | 84.99 |
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| This website was created by Dr Gordon Gilmore for the benefit of readers of Practical Gamma-Ray Spectrometry (3rd Edition). | Problems with this page? Report it on the Feedback page. |