DeepBlueMarin 04222013
Irradiation of Silver coins from Deep Blue Marin performed on April 22, 2013
Large Coin
Raw Spectrum
Calibration
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| Linear fit using several sources | Zoom in to the most intense line | The most intense line seems to be from positron annihilation |
Energy Calibrated spectrum
Peak Ratios
Ratio of 511 and
| Coin Size | 511/451 ratio | 511/748 ratio | 511/1046 ratio |
| Large | 87740/6639 =13.2 | 87740/2962=29.6 | 87740/2803 = 31.3 |
| Medium | 31950/2938 =10.9 | 31950/1239 =25.8 | 31950/1283=24.9 |
| Small | 87090/8184=10.6 | 87090/3790 =22.98 | 87090/3578=24.34 |