Beta Max	Beta Range	Half Life
0.694 MeV Mean energy	720 cm in air	14.263 days
1.711 MeV Max energy

In Use

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

• If handled at distances of 10 cm or more 3 MBq
• If handled at distances of less than 10 cm 3 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
3.2 x 10-9 Sv.Bq-1 - 1μm AMAD, medium clearance time	2.4 x 10-9 Sv.Bq-1	6.55 x 10-10 Gy.s-1 per Bq.cm-2

Classification

If the total quantity of phosphorus - 32 in the laboratory is over 5 MBq, it is necessary to classify the laboratory as a controlled area.

If the total quantity of phosphorus - 32 in the laboratory is over 2 MBq, it is necessary to classify the laboratory as a supervised area.

*5MBq if inhaled would give rise to an effective dose of 15 mSv.