Skip to main content Skip to navigation

Calcium 45

Beta Gamma Beta range Half Life
0.0772 MeV Mean energy 12.5 KeV 150 cm in air 162.67 days
0.2568 MeV Max energy

In Use

The following quantities will give a dose rate of 2 mSv.hr-1 without shielding.

  • If handled at distances of 10 cm or more 300 MBq
  • If handled at distances of less than 10 cm 150 MBq

Note that these quantities may be handled for a maximum of 15 minutes per day, five days a week, before the dose rate to the fingers is exceeded.

Effective Dose Coefficients

Inhalation coefficient Ingestion coefficient Skin dose coefficient
2.7 x 10-9 Sv.Bq-1 - 1μm AMAD 7.6 x 10-10 Sv.Bq-1 2.39 x 10-10 Gy.s-1 per Bq.cm-2


Classification

If the total quantity of calcium - 45 in the laboratory is over 55 MBq*, it is necessary to classify the laboratory as a controlled area.

If the total quantity of calcium - 45 in the laboratory is over 20 MBq, it necessary to classify the laboratory as a supervised area.

*55MBq if inhaled would give rise to an effective dose of 15 mSv.