DAMA Calibrations – low energy

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Presentation transcript:

DAMA Calibrations – low energy External sources 241Am: 59.5 keV gamma Used as regular calibration during run 133Ba: 81.0 keV gamma Internal 40K: 3.2 keV X-ray/Auger electron 125I: 40.4 keV (composite) and 67.3 keV gammas and/or X- rays and/or Auger electrons 129I: (cosmogenic): 39.6 keV gamma plus β 210Pb: 46.5 keV X-ray (following decay to excited 210Bi)

DAMA Calibrations – high energy 133Ba: 81 keV and 356 keV 137Cs: 662 keV 60Co: 1173 keV, 1332 keV (combined 2505 keV) 40K: 1461 keV (tagged with 3.2 keV X-ray)

Typical Calibration Sources for NaI Detectors Possible calibration sources: 57Co, 133Ba, 22Na, 137Cs, 54Mn, 60 Co, 208Tl

Candidate low-energy (<100 keV) calibration sources 109Cd: 88 keV 133Ba: 81 keV 241Am: 60 keV 57Co: 14 keV (9%) 55Fe: 5.90 keV (Mn X-Ray)