Science Gateway
Radioisotope
Calcium - 45
Carbon - 14
Chromium - 51
Hydrogen - 3
Iodine - 125
Iron - 59
Manganese - 54
Phosphorus - 32
Phosphorus - 33
Sodium - 22
Sulfur - 35

CALCIUM - 45

(45Ca)

Physical Half-life: 162.7 days
Radiations:-256.7 keV

External Exposure: Slight external hazard.
Biological Data: ALI 2 mCi (ingestion), 0.08 mCi (inhalation)
Biological half-life 45 years
Effective half-life 162.7 days
Critical Organs Whole Body and Bone
Bioassay Urinalysis (Not routinely done)
Shielding: Plexiglass is recommended.
Range of in air is 20" and 0.02" in lucite.
Monitoring
& Efficiency
LSC (Eff. ~90%)
Thin-window GM (Eff. ~20%)

Special Considerations

  • No additional shielding is needed. It is normally provided with the solution and the apparatus being used.

  • The 256.7 keV 's are able to penetrate the gloves and the outer layer of skin. Monitor your gloves frequently when working.
  • Wear a radiation badge when handling 1.0 mCi or more vials.