Table
| nuclide symbol |
Z(p) | N(n) | isotopic mass (u) |
half-life | decay mode(s) |
daughter isotope(s) |
nuclear spin |
representative isotopic composition (mole fraction) |
range of natural variation (mole fraction) |
|---|---|---|---|---|---|---|---|---|---|
| excitation energy | |||||||||
| 155Ta | 73 | 82 | 154.97459(54)# | 13(4) µs |
(11/2−) | ||||
| 156Ta | 73 | 83 | 155.97230(43)# | 144(24) ms | β+ (95.8%) | 156Hf | (2−) | ||
| p (4.2%) | 155Hf | ||||||||
| 156mTa | 102(7) keV | 0.36(4) s | p | 155Hf | 9+ | ||||
| 157Ta | 73 | 84 | 156.96819(22) | 10.1(4) ms | α (91%) | 153Lu | 1/2+ | ||
| β+ (9%) | 157Hf | ||||||||
| 157m1Ta | 22(5) keV | 4.3(1) ms | 11/2− | ||||||
| 157m2Ta | 1593(9) keV | 1.7(1) ms | α | 153Lu | (25/2−) | ||||
| 158Ta | 73 | 85 | 157.96670(22)# | 49(8) ms | α (96%) | 154Lu | (2−) | ||
| β+ (4%) | 158Hf | ||||||||
| 158mTa | 141(9) keV | 36.0(8) ms | α (93%) | 154Lu | (9+) | ||||
| IT | 158Ta | ||||||||
| β+ | 158Hf | ||||||||
| 159Ta | 73 | 86 | 158.963018(22) | 1.04(9) s | β+ (66%) | 159Hf | (1/2+) | ||
| α (34%) | 155Lu | ||||||||
| 159mTa | 64(5) keV | 514(9) ms | α (56%) | 155Lu | (11/2−) | ||||
| β+ (44%) | 159Hf | ||||||||
| 160Ta | 73 | 87 | 159.96149(10) | 1.70(20) s | α | 156Lu | (2#)− | ||
| β+ | 160Hf | ||||||||
| 160mTa | 310(90)# keV | 1.55(4) s | β+ (66%) | 160Hf | (9)+ | ||||
| α (34%) | 156Lu | ||||||||
| 161Ta | 73 | 88 | 160.95842(6)# | 3# s | β+ (95%) | 161Hf | 1/2+# | ||
| α (5%) | 157Lu | ||||||||
| 161mTa | 50(50)# keV | 2.89(12) s | 11/2−# | ||||||
| 162Ta | 73 | 89 | 161.95729(6) | 3.57(12) s | β+ (99.92%) | 162Hf | 3+# | ||
| α (.073%) | 158Lu | ||||||||
| 163Ta | 73 | 90 | 162.95433(4) | 10.6(18) s | β+ (99.8%) | 163Hf | 1/2+# | ||
| α (.2%) | 159Lu | ||||||||
| 164Ta | 73 | 91 | 163.95353(3) | 14.2(3) s | β+ | 164Hf | (3+) | ||
| 165Ta | 73 | 92 | 164.950773(19) | 31.0(15) s | β+ | 165Hf | 5/2−# | ||
| 165mTa | 60(30) keV | 9/2−# | |||||||
| 166Ta | 73 | 93 | 165.95051(3) | 34.4(5) s | β+ | 166Hf | (2)+ | ||
| 167Ta | 73 | 94 | 166.94809(3) | 1.33(7) min | β+ | 167Hf | (3/2+) | ||
| 168Ta | 73 | 95 | 167.94805(3) | 2.0(1) min | β+ | 168Hf | (2−,3+) | ||
| 169Ta | 73 | 96 | 168.94601(3) | 4.9(4) min | β+ | 169Hf | (5/2+) | ||
| 170Ta | 73 | 97 | 169.94618(3) | 6.76(6) min | β+ | 170Hf | (3)(+#) | ||
| 171Ta | 73 | 98 | 170.94448(3) | 23.3(3) min | β+ | 171Hf | (5/2−) | ||
| 172Ta | 73 | 99 | 171.94490(3) | 36.8(3) min | β+ | 172Hf | (3+) | ||
| 173Ta | 73 | 100 | 172.94375(3) | 3.14(13) h | β+ | 173Hf | 5/2− | ||
| 174Ta | 73 | 101 | 173.94445(3) | 1.14(8) h | β+ | 174Hf | 3+ | ||
| 175Ta | 73 | 102 | 174.94374(3) | 10.5(2) h | β+ | 175Hf | 7/2+ | ||
| 176Ta | 73 | 103 | 175.94486(3) | 8.09(5) h | β+ | 176Hf | (1)− | ||
| 176m1Ta | 103.0(10) keV | 1.1(1) ms | IT | 176Ta | (+) | ||||
| 176m2Ta | 1372.6(11)+X keV | 3.8(4) µs | (14−) | ||||||
| 176m3Ta | 2820(50) keV | 0.97(7) ms | (20−) | ||||||
| 177Ta | 73 | 104 | 176.944472(4) | 56.56(6) h | β+ | 177Hf | 7/2+ | ||
| 177m1Ta | 73.36(15) keV | 410(7) ns | 9/2− | ||||||
| 177m2Ta | 186.15(6) keV | 3.62(10) µs | 5/2− | ||||||
| 177m3Ta | 1355.01(19) keV | 5.31(25) µs | 21/2− | ||||||
| 177m4Ta | 4656.3(5) keV | 133(4) µs | 49/2− | ||||||
| 178Ta | 73 | 105 | 177.945778(16) | 9.31(3) min | β+ | 178Hf | 1+ | ||
| 178m1Ta | 100(50)# keV | 2.36(8) h | β+ | 178Hf | (7)− | ||||
| 178m2Ta | 1570(50)# keV | 59(3) ms | (15−) | ||||||
| 178m3Ta | 3000(50)# keV | 290(12) ms | (21−) | ||||||
| 179Ta | 73 | 106 | 178.9459295(23) | 1.82(3) a | EC | 179Hf | 7/2+ | ||
| 179m1Ta | 30.7(1) keV | 1.42(8) µs | (9/2)− | ||||||
| 179m2Ta | 520.23(18) keV | 335(45) ns | (1/2)+ | ||||||
| 179m3Ta | 1252.61(23) keV | 322(16) ns | (21/2−) | ||||||
| 179m4Ta | 1317.3(4) keV | 9.0(2) ms | IT | 179Ta | (25/2+) | ||||
| 179m5Ta | 1327.9(4) keV | 1.6(4) µs | (23/2−) | ||||||
| 179m6Ta | 2639.3(5) keV | 54.1(17) ms | (37/2+) | ||||||
| 180Ta | 73 | 107 | 179.9474648(24) | 8.152(6) h | EC (86%) | 180Hf | 1+ | ||
| β- (14%) | 180W | ||||||||
| 180m1Ta | 77.1(8) keV | Observationally Stable | 9− | 1.2(2)×10−4 | |||||
| 180m2Ta | 1452.40(18) keV | 31.2(14) µs | 15− | ||||||
| 180m3Ta | 3679.0(11) keV | 2.0(5) µs | (22−) | ||||||
| 180m4Ta | 4171.0+X keV | 17(5) µs | (23,24,25) | ||||||
| 181Ta | 73 | 108 | 180.9479958(19) | Observationally Stable | 7/2+ | 0.99988(2) | |||
| 181m1Ta | 6.238(20) keV | 6.05(12) µs | 9/2− | ||||||
| 181m2Ta | 615.21(3) keV | 18(1) µs | 1/2+ | ||||||
| 181m3Ta | 1485(3) keV | 25(2) µs | 21/2− | ||||||
| 181m4Ta | 2230(3) keV | 210(20) µs | 29/2− | ||||||
| 182Ta | 73 | 109 | 181.9501518(19) | 114.43(3) d | β- | 182W | 3− | ||
| 182m1Ta | 16.263(3) keV | 283(3) ms | IT | 182Ta | 5+ | ||||
| 182m2Ta | 519.572(18) keV | 15.84(10) min | 10− | ||||||
| 183Ta | 73 | 110 | 182.9513726(19) | 5.1(1) d | β- | 183W | 7/2+ | ||
| 183mTa | 73.174(12) keV | 107(11) ns | 9/2− | ||||||
| 184Ta | 73 | 111 | 183.954008(28) | 8.7(1) h | β- | 184W | (5−) | ||
| 185Ta | 73 | 112 | 184.955559(15) | 49.4(15) min | β- | 185W | (7/2+)# | ||
| 185mTa | 1308(29) keV | >1 ms | (21/2−) | ||||||
| 186Ta | 73 | 113 | 185.95855(6) | 10.5(3) min | β- | 186W | (2−,3−) | ||
| 186mTa | 1.54(5) min | ||||||||
| 187Ta | 73 | 114 | 186.96053(21)# | 2# min |
β- | 187W | 7/2+# | ||
| 188Ta | 73 | 115 | 187.96370(21)# | 20# s |
β- | 188W | |||
| 189Ta | 73 | 116 | 188.96583(32)# | 3# s |
7/2+# | ||||
| 190Ta | 73 | 117 | 189.96923(43)# | 0.3# s | |||||
Read more about this topic: Isotopes Of Tantalum
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