1. 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)

2. 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)

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

4. 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)