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Half-life, effective

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The period during which the quantity of a radionuclide in a biological system is reduced by half by interaction of radioactive decay and excretion due to biological processes.



T phys: physica half-life

Tbiol: biological half-life

The table indicates the physical, biological and resulting determined effective half-life of some radionuclides for adults.

Nuklid
Physical
half-life

Biological
half-life
Effektive
half-life
Tritium
12.3 a
10 d
10 d
Iodine-131
8 d
80 d
7.2 d
Caesium-134
2.1 a
110 d
96 d
Caesium-137
30.2 a
110 d
109 d
Plutonium-239
24,100 a
50 a
49.9 a

Half-lives for some radionuclides

 

 

 


 

 


 

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