| Proton | Neutron | Nuclear Spin | Energy State | |
|---|---|---|---|---|
| 231Am | 95 | 136 | 3/2 | |
| 232Am | 95 | 137 | 1 | |
| 233Am | 95 | 138 | 1/2 | |
| 234Am | 95 | 139 | 0 | |
| 235Am | 95 | 140 | -5/2 | |
| 236Am | 95 | 141 | 0 | |
| 237Am | 95 | 142 | -5/2 | |
| 238Am | 95 | 143 | 1 | |
| 239mAm | 95 | 144 | 7/2 | |
| 239Am | 95 | 144 | -5/2 | |
| 240Am | 95 | 145 | -3 | |
| 241Am | 95 | 146 | -5/2 | |
| 242Am | 95 | 147 | -1 | |
| 242m1Am | 95 | 147 | -5 | |
| 243Am | 95 | 148 | -5/2 | |
| 244Am | 95 | 149 | -6 | |
| 244mAm | 95 | 149 | 1 | |
| 245Am | 95 | 150 | 5/2 | |
| 246m1Am | 95 | 151 | -2 | |
| 246Am | 95 | 151 | -7 | |
| 247Am | 95 | 152 | 5/2 | |
| 248Am | 95 | 153 | 1 | |
| 249Am | 95 | 154 | 3/2 |