200,000 second background - 700 to 1200 keVHome Page | Examples Page | 0 - 200 keV | 200 - 700 keV | 1200 - 2000 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 spectrum was analyzed by GammaVision. This particular analaysis demonstrates the ability of GammaVision, under the same analytical parameters, to find peaks invisible to the naked eye and to ignore perfectly obvious peaks.
|
| Measured Energy (keV) | True Energy (keV) | Peak Counts | Nuclide | Emission Probability (%) | Source of radiation | |
| 1 | 726.8 | 726.86 | 0 | 228Ac | 0.62 | 232Th series |
| 2 | 727.52 | 727.33 | 647 | 212Bi | 6.74 | 232Th series |
| 3 | 755.57 | 755.31 | 170 | 228Ac | 1 | 232Th series |
| 4 | 766.36 | 765.96 | 154 | 214Pb | 0.053 | 238U series (226Ra) |
| 766.37 | 234mPa | 0.316 | 238U series | |||
| 5 | 768.35 | 768.36 | 573 | 214Bi | 4.891 | 238U series (226Ra) |
| 6 | 785.92 | 785.37 | 212Bi | 1.11 | 232Th series | |
| 785.96 | 214Pb | 1.064 | 238U series (226Ra) | |||
| 786.1 | 214Bi | 0.314 | 238U series (226Ra) | |||
| 786.27 | 234mPa | 0.055 | 238U series | |||
| 7 | 795.4 | 794.95 | 476 | 228Ac | 4.25 | 232Th series |
| 8 | 803.4 | 803.06 | b+/b-Ann. | 1 | 206Pb(n,n’) prompt g | |
| 9 | 806.51 | 806.17 | 144 | 214Bi | 1.262 | 238U series (226Ra) |
| 10 | 832.6 | 832.39 | 135 | 214Bi | 0.0346 | 238U series (226Ra) |
| 11 | 835.7 | 835.71 | 236 | 228Ac | 1.61 | 232Th series |
| 835.9 | 208Tl | 0.076 | 232Th series | |||
| 12 | 839.27 | 839.04 | 160 | 214Pb | 0.587 | 238U series (226Ra) |
| 13 | 860.94 | 860.56 | 356 | 208Tl | 12.5 | 232Th series |
| 14 | 911.54 | 911.2 | 2323 | 228Ac | 25.8 | 232Th series |
| 15 | 934.42 | 934.06 | 274 | 214Bi | 3.096 | 238U series (226Ra) |
| 16 | 964.84 | 964.08 | 521 | 214Bi | 0.363 | 238U series (226Ra) |
| 964.77 | 228Ac | 4.99 | 232Th series | |||
| 17 | 969.16 | 968.97 | 1392 | 228Ac | 15.8 | 232Th series |
| 18 | 1001.68 | 1001.03 | 414 | 234mPa | 0.839 | 238U series |
| 19 | 1120.75 | 1120.29 | 1525 | 214Bi | 14.907 | 238U series (226Ra) |
| Home Page | Appendices | Data | Example Spectra | Links | Spreadsheets | Test Spectra | TOP |
| 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. |