Occupational Intakes of Radionuclides Part 1 - ICRP
Occupational Intakes of Radionuclides Part 1 - ICRP
Occupational Intakes of Radionuclides Part 1 - ICRP
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2626<br />
2627<br />
2628<br />
2629<br />
Uranium-238<br />
Thorium-234<br />
Protactinium-234m<br />
Uranium-234<br />
a 4.5 billion years<br />
a 250,000 years<br />
b<br />
1.2 minutes<br />
b<br />
24 days<br />
Thorium-230<br />
Radium-226<br />
a<br />
Radon-222<br />
a<br />
a<br />
Polonium-218<br />
Lead-214*<br />
75,000 years<br />
1,600 years<br />
3.8 days<br />
DRAFT REPORT FOR CONSULTATION<br />
Polonium-214 Polonium-210<br />
a 3.1 minutes a 160 microseconds a 140 days<br />
b<br />
Bismuth-214* Bismuth-210<br />
27 minutes<br />
b 20 minutes<br />
Notes:<br />
The symbols a and b indicate alpha and beta<br />
decay, and the times shown are half-lives.<br />
An asterisk indicates that the isotope is also<br />
a significant gamma emitter.<br />
Uranium-238 also decays by spontaneous<br />
fission<br />
74<br />
b<br />
b<br />
22 years<br />
5.0 days<br />
Lead-210 Lead-206 (stable)<br />
Figure 10 Natural decay series: Uranium-238
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