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Dose coefficient

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Factors determining the radiation exposure of individual organs and the whole body by incorporated radioactive substances. Dose factors depend on the radionuclide, the incorporation type (inhalation/ingestion), the chemical compound of the radionuclide and on the age of the person. In the Federal Gazette No. 160a and b dated 28th August 2001, the dose factors (dose coefficients)are listed in detail for members of the public and for occupationally exposed persons. They indicate the dose in 24 organs or tissues and the effective dose for inhaled or ingested activity of 1 Becquerel.

Nuklide

Organ

Dose factor in Sv/Bq

< 1 year

7 - 12 years

> 17 years

H-3

effective dose

6.4.10-11

2.3·10-11

1.8·10-11 

C-14

effective dose

1.4·10-9

8.0·10-10

5.8·10-10

Sr-90

bone surface
effective dose

2.3·10-6
2.3·10-7

4.1·10-6
6.0 10-8

4.1·10-7
2.8·10-8

I-131

thyroid
effective dose

3.7·10-6
1.8·10-7

1.0·10-6
5.2·10-8

4.3·10-7
2.2·10-8

Cs-137

effective dose

2.1·10-8

1.0·10-8

1.3·10-8

Ra-226

bone surface effective dose

1.6·10-4
4.7 10-6

3.9·10-5
8.0·10-7

1.2·10-5
2.8·10-7

Pu-239

bone surface
effective dose

7.4·10-5
4.2·10 -6

6.8·10-6
2.7·10-7

8.2·10-6
2.5·10-7

Examples of dose factors for members of the public for the calculation of the organ dose or the effective dose due to ingestion of radionuclides

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