Half-life, effective
 scroll 
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
|
|
11 - 15 March 2018
Munich, Germany
30 September - 04 October 2018
Prague, Czech Republic |
