IAEA RGTh-1 Reference Material - 1200 - 2100 keVHome Page | Examples Page | 200 - 700 keV | 200 - 700 keV | 700 - 1200 keV |
| This spectrum was measured using a 45% n-type detector, mounted in a standard 10cm thick cylindrical graded shield, in a routine laboratory at typical altitude with no special background suppression facilities. The material is IAEA RGTh-1 reference material. The spectrum represents 120 ml of that, measured in a cylindrical container stood on the detector face. Sample height was 41 mm. There is a small amount of uranium in this material and the spectrum contains peaks from the 235,238U decay series from that and the natural background. The are a number of inidentified peaks in the spectrum that could well be coincidence sum peaks.
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| Measured Energy (keV) | True Energy (keV) | Peak Counts | Nuclide | Emission Probability (%) | Source of radiation | |
| 1 | 1238 | 1238.11 | 1935 | 214Bi | 5.827 | 238U series (226Ra) |
| 2 | 1244.83 | 1245.05 | 6774 | 228Ac | 0.095 | 232Th series |
| 3 | 1246.84 | 1247.08 | 228Ac | 0.5 | 232Th series | |
| 4 | 1373.99 | 1374.19 | 1378 | 228Ac | 0.014 | 232Th series |
| 5 | 1407.88 | 1407.98 | 793 | 214Bi | 2.389 | 238U series (226Ra) |
| 6 | 1431.55 | 1430.95 | 228Ac | 0.035 | 232Th series | |
| 7 | 1459.19 | 1459.14 | 8661 | 228Ac | 0.83 | 232Th series |
| 8 | 1460.82 | 1460.82 | 4998 | 40K | 10.66 | Primordial |
| 9 | 1495.74 | 1495.91 | 10055 | 228Ac | 0.86 | 232Th series |
| 10 | 1501.55 | 1501.57 | 5144 | 228Ac | 0.46 | 232Th series |
| 11 | 1509.15 | 1509.23 | 214Bi | 2.126 | 238U series (226Ra) | |
| 12 | 1512.35 | 1512.7 | 4827 | 212Bi | 0.29 | 232Th series |
| 13 | 1557.25 | 1557.06 | 2143 | 228Ac | 0.178 | 232Th series |
| 14 | 1580.32 | 1580.53 | 6597 | 228Ac | 0.6 | 232Th series |
| 15 | 1588.09 | 1588.2 | 33688 | 228Ac | 3.22 | 232Th series |
| 16 | 1620.74 | 1620.74 | 15840 | 212Bi | 1.51 | 232Th series |
| 17 | 1625.05 | 1625.06 | 3115 | 228Ac | 0.255 | 232Th series |
| 18 | 1630.55 | 1630.63 | 16905 | 228Ac | 1.51 | 232Th series |
| 19 | 1638.21 | 1638.28 | 4674 | 228Ac | 0.47 | 232Th series |
| 20 | 1666.82 | 1666.52 | 2029 | 228Ac | 0.178 | 232Th series |
| 21 | 1678.97 | 1677.68 | 228Ac | 0.054 | 232Th series | |
| 1679.45 | 212Bi | 0.07 | 232Th series | |||
| 22 | 1685.76 | 1686.12 | 1039 | 228Ac | 0.095 | 232Th series |
| 23 | 1729.36 | 1729.6 | 214Bi | 2.843 | 238U series (226Ra) | |
| 24 | 1764.46 | 1764.49 | 4300 | 214Bi | 15.28 | 238U series (226Ra) |
| 25 | 1806.02 | 1805.96 | 1247 | 212Bi | 0.12 | 232Th series |
| 26 | 1822.87 | 1823.28 | 655 | 228Ac | 0.044 | 232Th series |
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