DeepBlueMarin 04222013

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Irradiation of Silver coins from Deep Blue Marin performed on April 22, 2013

Large Coin

Raw Spectrum

Calibration

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 511/405 ratio 511/1700 ratio
Linear fit using several sources Zoom in to the most intense line

Rate normalized spectrum

PAA_DeepBlueMarine