200,000 second background - 1200 to 2000 keVHome Page | Examples Page | 0 - 200 keV | 200 - 700 keV | 700 - 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, in a routine laboratory at typical altitude with no special background suppression facilities.
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| Measured Energy (keV) | True Energy (keV) | Peak Counts | Nuclide | Emission Probability (%) | Source of radiation | |
| 1 | 1238.84 | 1238.11 | 664 | 214Bi | 5.827 | 238U series (226Ra) |
| 2 | 1459.71 | 1459.14 | 0 | 228Ac | 0.83 | 232Th series |
| 3 | 1461.41 | 1460.82 | 5464 | 40K | 10.66 | Primordial |
| 4 | 1588.5 | 1588.2 | 228Ac | 3.22 | 232Th series | |
| 5 | 1593.01 | 1593.7 | 181 | 234mPa | 0.00384 | 238U series |
| 6 | 1621.23 | 1620.74 | 145 | 212Bi | 1.51 | 232Th series |
| 7 | 1730.19 | 1729.6 | 295 | 214Bi | 2.843 | 238U series (226Ra) |
| 8 | 1764.5 | 1764.49 | 11 | 214Bi | 15.28 | 238U series (226Ra) |
| 9 | 1765.21 | 1765.4 | 1400 | 234mPa | 0.0087 | 238U series |
| 10 | 1847.86 | 1847.42 | 199 | 214Bi | 2.023 | 238U series (226Ra) |
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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. |