| Proton | Neutron | Nuclear Spin | Energy State | |
|---|---|---|---|---|
| 114Ba | 56 | 58 | 0 | |
| 115Ba | 56 | 59 | 5/2 | |
| 116Ba | 56 | 60 | 0 | |
| 117Ba | 56 | 61 | 3/2 | |
| 118Ba | 56 | 62 | 0 | |
| 119Ba | 56 | 63 | 5/2 | |
| 120Ba | 56 | 64 | 0 | |
| 121Ba | 56 | 65 | 5/2 | |
| 122Ba | 56 | 66 | 0 | |
| 123Ba | 56 | 67 | 5/2 | |
| 124Ba | 56 | 68 | 0 | |
| 125Ba | 56 | 69 | 1/2 | |
| 126Ba | 56 | 70 | 0 | |
| 127mBa | 56 | 71 | -7/2 | |
| 127Ba | 56 | 71 | 1/2 | |
| 128Ba | 56 | 72 | 0 | |
| 129mBa | 56 | 73 | 7/2 | |
| 129Ba | 56 | 73 | 1/2 | |
| 130mBa | 56 | 74 | -8 | |
| 130Ba | 56 | 74 | 0 | |
| 131Ba | 56 | 75 | 1/2 | |
| 131mBa | 56 | 75 | -9/2 | |
| 132Ba | 56 | 76 | 0 | Stable |
| 133Ba | 56 | 77 | 1/2 | |
| 133mBa | 56 | 77 | -11/2 | |
| 134Ba | 56 | 78 | 0 | Stable |
| 135Ba | 56 | 79 | 3/2 | Stable |
| 135mBa | 56 | 79 | -11/2 | |
| 136Ba | 56 | 80 | 0 | Stable |
| 136mBa | 56 | 80 | -7 | |
| 137Ba | 56 | 81 | 3/2 | Stable |
| 137m2Ba | 56 | 81 | -17/2 | |
| 137m1Ba | 56 | 81 | -11/2 | |
| 138Ba | 56 | 82 | 0 | Stable |
| 138mBa | 56 | 82 | 6 | |
| 139Ba | 56 | 83 | -7/2 | |
| 140Ba | 56 | 84 | 0 | |
| 141Ba | 56 | 85 | -3/2 | |
| 142Ba | 56 | 86 | 0 | |
| 143Ba | 56 | 87 | -5/2 | |
| 144Ba | 56 | 88 | 0 | |
| 145Ba | 56 | 89 | -5/2 | |
| 146Ba | 56 | 90 | 0 | |
| 147Ba | 56 | 91 | 3/2 | |
| 148Ba | 56 | 92 | 0 | |
| 149Ba | 56 | 93 | -3/2 | |
| 150Ba | 56 | 94 | 0 | |
| 151Ba | 56 | 95 | -3/2 | |
| 152Ba | 56 | 96 | 0 | |
| 153Ba | 56 | 97 | -5/2 |