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Iron 55

Beta Max Half Life
MeV 2.737 Years

In Use

The following quantities will give a dose rate of 2mSv/h without shielding.

  • If handled at distances of 10 cm or more 3 MBq
  • If handled at distances of less than 10 cm 30 KBq

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

3.7 x 10-10 Sv.Bq-1 - 1μm AMAD, medium clearance time

3.3 x 10-10 Sv.Bq-1

1.24 x 10-20 Gy.s-1 per Bq.cm-2


Classification

If the total quantity of Iron-55 in the laboratory is over 40 MBq it is necessary to classify the laboratory as a controlled area.

If the total quantity of Iron-55 in the laboratory is over 15MBq, it is necessary to classify the laboratory as a supervised area.

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