核素Nuclide
原子密度Atomic density/atoms/barn-cm
10B
1.3465 × 10−2
11B
5.4542 × 10−2
12C
2.2261 × 10−2
28Si
3.6583 × 10−3
29Si
1.8584 × 10−4
30Si
1.2265 × 10−4