Danh sách đồng vị
Chu kỳ 6 > Thalli, Z=81

| Đồng vị | Kỳ bán rã | Năng lượng  phân rã, MeV | Spin /  Chẵn lẻ | Phân rã, % | Tỷ lệ, % |
| --- | --- | --- | --- | --- | --- |
| 179Tl | 0,16 s | 6,86 |  | α ≈ 100 |   |
| 179m1Tl | 1,4 ms | 6,86 | (9/2−) | α ≈ 100 |   |
| 180Tl | 0,70 s | 6,82 (α), 11,1 (K/β+) |  | K/β+ = ?, KSF ≈ 1,0 × 10−4 |   |
| 181Tl | 3,4 s | 8,5 | (1/2+) | K/β+ > 0 |   |
| 181m1Tl | 3,4 s |  | (9/2−) | α = ? |   |
| 182Tl | 3,1 s | 10,1 (K/β+), 6,55 (α) | (7+) | K/β+ > 96, α < 4 |   |
| 183Tl | 6,9 s | 7,6 | (1/2+) | K/β+ > 0 |   |
| 183m1Tl | 60 ms | 0,550 (IT), 6,85 (α) | (9/2−) | α < 0,010 |   |
| 184Tl | 11 s | 9,2 (K/β+), 6,30 (α) | 2+ | K/β+ = 97,9, α = 2,1 |   |
| 185Tl | 19,5 s | 6,6 | (1/2+) | K/β+ = ? |   |
| 185m1Tl | 1,83 s | 0,454 (IT), 6,554 (α) | (9/2−) | IT = ?, α = ? |   |
| 186Tl | 27,5 s | 8,5 (K/β+), 5,89 (α) | (7+) | K/β+ = 100, α ≈ 0,006 |   |
| 186m1Tl | 2,9 s | 0,374 | (10−) | IT = 100 |   |
| 187Tl | 51 s | 5,9 (K/β+), 5,539 (α) | (1/2+) | K/β+ = ?, α = ? |   |
| 187m1Tl | 15,60 s | 0,335 (IT), 6,235 (K/β+), 5,874 (α) | (9/2−) | IT = ?, K/β+ = ?, α = ? |   |
| 188Tl | 71 s | 7,8 | (2−) | K/β+ = 100 |   |
| 188m1Tl | 71 s | 7,8 | (7+) | K/β+ = 100 |   |
| 188m2Tl | 41 ms |  | (9−) | IT = 100 |   |
| 189Tl | 2,3 min | 5,18 | (1/2+) | K/β+ = 100 |   |
| 189m1Tl | 1,4 min | 5,461 (K/β+), 0,281 (IT) | (9/2−) | K/β+ = 100, IT < 4 |   |
| 190Tl | 2,6 min | 7,0 | (2) − | K/β+ = 100 |   |
| 190m1Tl | 3,7 min | 7,0 | (7+) | K/β+ = 100 |   |
| 191Tl |  | 4,49 | (1/2+) | K/β+ = ? |   |
| 191m1Tl | 5,22 min | 4,789 | 9/2(−) | K/β+ = 100 |   |
| 192Tl | 9,6 min | 6,12 | (2−) | K/β+ = 100 |   |
| 192m1Tl | 10,8 min | 6,12 | (7+) | K/β+ = 100 |   |
| 193Tl | 21,6 min | 3,64 | 1/2+ | K/β+ = 100 |   |
| 193m1Tl | 2,11 min | 0,365 (IT), 4,005 (K/β+) | 9/2− | IT = 75, K/β+ = 25 |   |
| 194Tl | 33,0 min | 5,28 (K/β+), 3,49 (α) | 2− | K/β+ = 100, α < 1 × 10−7 |   |
| 194m1Tl | 32,8 min | 5,28 | (7+) | K/β+ = 100 |   |
| 195Tl | 1,16 h | 2,81 | 1/2+ | K/β+ = 100 |   |
| 195m1Tl | 3,6 s | 0,483 | 9/2− | IT = 100 |   |
| 196Tl | 1,84 h | 4,38 | 2− | K/β+ = 100 |   |
| 196m1Tl | 1,41 h | 4,774 (K/β+) 0,394 (IT) | (7+) | K/β+ = 95,5, IT = 4,5 |   |
| 197Tl | 2,84 h | 2,18 | 1/2+ | K/β+ = 100 |   |
| 197m1Tl | 0,54 s | 0,608 | 9/2− | IT = 100 |   |
| 198Tl | 5,3 h | 3,46 | 2− | K/β+ = 100 |   |
| 198m1Tl | 1,87 h | 4,004 (K/β+), 0,544 (IT) | 7+ | K/β+ = 54, IT = 46 |   |
| 198m2Tl | 32,1 ms | 0,742 | (10−) | IT = 100 |   |
| 199Tl | 7,42 h | 1,44 | 1/2+ | K/β+ = 100 |   |
| 199m1Tl | 28,4 ms | 0,75 | 9/2− | IT = 100 |   |
| 200Tl | 26,1 h | 2,456 | 2− | K/β+ = 100 |   |
| 200m1Tl | 34,3 ms | 0,754 | 7+ | IT = 100 |   |
| 201Tl | 72,912 h | 0,483 | 1/2+ | K = 100 |   |
| 201m1Tl | 2,035 ms | 0,92 | (9/2−) | IT = 100 |   |
| 202Tl | 12,23 d | 1,365 | 2− | K/β+ = 100 |   |
| 202m1Tl | 572 µs |  | 7+ |  |   |
| 203Tl | Bền |  | 1/2+ |   | 29,524 |
| 204Tl | 3,78 a | 0,764 (β−), 0,347 (K) | 2− | β− = 97,10, K = 2,90 |   |
| 205Tl | Bền |  | 1/2+ |   | 70,476 |
| 206Tl | 4,199 min | 1,533 | 0− | β− = 100 |   |
| 206m1Tl | 3,74 min | 2,643 | (12−) | IT = 100 |   |
| 207Tl | 4,77 min | 1,423 | 1/2+ | β− = 100 |   |
| 207m1Tl | 1,33 s | 1,348 | 11/2− | IT = 100, β− < 0,1 |   |
| 208Tl | 3,053 min | 5,001 | 5(+) | β− = 100 |   |
| 209Tl | 2,20 min | 3,98 | (1/2+) | β− = 100 |   |
| 210Tl | 1,30 min | 5,484 (β−), 0,299 (β−n) | (5+) | β− = 100, β−n = 0,007 +7− 4 |   |