The table of activity-mass relationships for uranium and natural thorium are as follows:
| Thorium and uranium enrichment
1(Wt%
235 U present)
| Specific activity
|
|---|
| TBq/gram
| Grams/Tbq
| Ci/gram
| Grams/Ci
|
|---|
| 0.45 (depleted) | 1.9 × 10−8 | 5.4 × 10
7 | 5.0 × 10−7 | 2.0 × 10
6
|
| 0.72 (natural) | 2.6 × 10−8 | 3.8 × 10
7 | 7.1 × 10−7 | 1.4 × 10
6
|
| 1.0 | 2.8 × 10−8 | 3.6 × 10
7 | 7.6 × 10−7 | 1.3 × 10
6
|
| 1.5 | 3.7 × 10−8 | 2.7 × 10
7 | 1.0 × 10−6 | 1.0 × 10
6
|
| 5.0 | 1.0 × 10−7 | 1.0 × 10
7 | 2.7 × 10−6 | 3.7 × 10
5
|
| 10.0 | 1.8 × 10−7 | 5.6 × 10
6 | 4.8 × 10−6 | 2.1 × 10
5
|
| 20.0 | 3.7 × 10−7 | 2.7 × 10
6 | 1.0 × 10−5 | 1.0 × 10
5
|
| 35.0 | 7.4 × 10−7 | 1.4 × 10
6 | 2.0 × 10−5 | 5.0 × 10
4
|
| 50.0 | 9.3 × 10−7 | 1.1 × 10
6 | 2.5 × 10−5 | 4.0 × 10
4
|
| 90.0 | 2.1 × 10−6 | 4.7 × 10
5 | 5.8 × 10−5 | 1.7 × 10
4
|
| 93.0 | 2.6 × 10−6 | 3.9 × 10
5 | 7.0 × 10−5 | 1.4 × 10
4
|
| 95.0 | 3.4 × 10−6 | 3.0 × 10
5 | 9.1 × 10−5 | 1.1 × 10
4
|
| Natural thorium | 8.1 × 10−9 | 1.2 × 10
8 | 2.2 × 10−7 | 4.6 × 10
6
|