| Proton | Neutron | Nuclear Spin | Energy State | |
|---|---|---|---|---|
| 119La | 57 | 62 | -11/2 | |
| 120La | 57 | 63 | -5 | |
| 121La | 57 | 64 | -11/2 | |
| 122La | 57 | 65 | -5 | |
| 123La | 57 | 66 | -11/2 | |
| 124La | 57 | 67 | -7 | |
| 125mLa | 57 | 68 | 3/2 | |
| 125La | 57 | 68 | -11/2 | |
| 126La | 57 | 69 | 5 | |
| 127mLa | 57 | 70 | 3/2 | |
| 127La | 57 | 70 | -11/2 | |
| 128La | 57 | 71 | 5 | |
| 129mLa | 57 | 72 | -11/2 | |
| 129La | 57 | 72 | 3/2 | |
| 130La | 57 | 73 | 3 | |
| 131mLa | 57 | 74 | -11/2 | |
| 131La | 57 | 74 | 3/2 | |
| 132mLa | 57 | 75 | -6 | |
| 132La | 57 | 75 | -2 | |
| 133La | 57 | 76 | 5/2 | |
| 134La | 57 | 77 | 1 | |
| 135La | 57 | 78 | 5/2 | |
| 136mLa | 57 | 79 | -8 | |
| 136La | 57 | 79 | 1 | |
| 137La | 57 | 80 | 7/2 | |
| 138La | 57 | 81 | 5 | |
| 138mLa | 57 | 81 | 3 | |
| 139La | 57 | 82 | 7/2 | Stable |
| 140La | 57 | 83 | -3 | |
| 141La | 57 | 84 | 7/2 | |
| 142La | 57 | 85 | -2 | |
| 143La | 57 | 86 | 7/2 | |
| 144La | 57 | 87 | -3 | |
| 145La | 57 | 88 | 5/2 | |
| 146mLa | 57 | 89 | -6 | |
| 146La | 57 | 89 | -2 | |
| 147La | 57 | 90 | 5/2 | |
| 148La | 57 | 91 | -2 | |
| 149La | 57 | 92 | 5/2 | |
| 150La | 57 | 93 | 3 | |
| 151La | 57 | 94 | 5/2 | |
| 152La | 57 | 95 | 4 | |
| 153La | 57 | 96 | 5/2 | |
| 154La | 57 | 97 | 3 | |
| 155La | 57 | 98 | 5/2 |