|
Isotope |
Relative abundance
by weight |
Half life
(years)
〔半減期〕 |
Specific activity
(Bq mg-1)
〔放射能の強さ〕 |
|
U-238 |
99.28% |
4510000000 |
12.4 |
|
U-235 |
0.72% |
710000000 |
80 |
|
U-234 |
0.0057% |
247000 |
231000 |
|
Isotope |
Average energy emitted per transformation
(MeV Bq-1) |
|
Alpha |
Beta |
Gamma |
|
U-238 |
4.26 |
0.01 |
0.001 |
|
U-235 |
4.47 |
0.048 |
0.154 |
|
U-234 |
4.84 |
0.0013 |
0.002 |
|
Isotope |
Relative isotopic abundance |
|
Natural |
Uranium |
Depleted |
Uranium |
|
|
By weight |
By activity |
By weight |
By activity |
|
U-238 |
99.28% |
48.8% |
99.8% |
83.7% |
|
U-235 |
0.72% |
2.4% |
0.2% |
1.1% |
|
U-234 |
0.0057% |
48.8% |
0.001% |
15.2% |
〔国際原子力機関(IAEA)の中の『Questions
and Answers』から〕 |