タンタルの同位体
一覧

| 同位体核種 | Z(p)> 励起エネルギー | N(n)> 励起エネルギー | 同位体質量 (u)> 励起エネルギー | 半減期 | 核スピン数 | 天然存在比 | 天然存在比 (範囲) |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 155Ta | 73 | 82 | 154.97459(54)# | 13(4) µs [12(+4-3) µs] | (11/2-) |  |  |
| 156Ta | 73 | 83 | 155.97230(43)# | 144(24) ms | (2-) |  |  |
| 156mTa | 102(7) keV | 102(7) keV | 102(7) keV | 0.36(4) s | 9+ |  |  |
| 157Ta | 73 | 84 | 156.96819(22) | 10.1(4) ms | 1/2+ |  |  |
| 157m1Ta | 22(5) keV | 22(5) keV | 22(5) keV | 4.3(1) ms | 11/2- |  |  |
| 157m2Ta | 1593(9) keV | 1593(9) keV | 1593(9) keV | 1.7(1) ms | (25/2-) |  |  |
| 158Ta | 73 | 85 | 157.96670(22)# | 49(8) ms | (2-) |  |  |
| 158mTa | 141(9) keV | 141(9) keV | 141(9) keV | 36.0(8) ms | (9+) |  |  |
| 159Ta | 73 | 86 | 158.963018(22) | 1.04(9) s | (1/2+) |  |  |
| 159mTa | 64(5) keV | 64(5) keV | 64(5) keV | 514(9) ms | (11/2-) |  |  |
| 160Ta | 73 | 87 | 159.96149(10) | 1.70(20) s | (2#)- |  |  |
| 160mTa | 310(90)# keV | 310(90)# keV | 310(90)# keV | 1.55(4) s | (9)+ |  |  |
| 161Ta | 73 | 88 | 160.95842(6)# | 3# s | 1/2+# |  |  |
| 161mTa | 50(50)# keV | 50(50)# keV | 50(50)# keV | 2.89(12) s | 11/2-# |  |  |
| 162Ta | 73 | 89 | 161.95729(6) | 3.57(12) s | 3+# |  |  |
| 163Ta | 73 | 90 | 162.95433(4) | 10.6(18) s | 1/2+# |  |  |
| 164Ta | 73 | 91 | 163.95353(3) | 14.2(3) s | (3+) |  |  |
| 165Ta | 73 | 92 | 164.950773(19) | 31.0(15) s | 5/2-# |  |  |
| 165mTa | 60(30) keV | 60(30) keV | 60(30) keV |  | 9/2-# |  |  |
| 166Ta | 73 | 93 | 165.95051(3) | 34.4(5) s | (2)+ |  |  |
| 167Ta | 73 | 94 | 166.94809(3) | 1.33(7) min | (3/2+) |  |  |
| 168Ta | 73 | 95 | 167.94805(3) | 2.0(1) min | (2-,3+) |  |  |
| 169Ta | 73 | 96 | 168.94601(3) | 4.9(4) min | (5/2+) |  |  |
| 170Ta | 73 | 97 | 169.94618(3) | 6.76(6) min | (3)(+#) |  |  |
| 171Ta | 73 | 98 | 170.94448(3) | 23.3(3) min | (5/2-) |  |  |
| 172Ta | 73 | 99 | 171.94490(3) | 36.8(3) min | (3+) |  |  |
| 173Ta | 73 | 100 | 172.94375(3) | 3.14(13) h | 5/2- |  |  |
| 174Ta | 73 | 101 | 173.94445(3) | 1.14(8) h | 3+ |  |  |
| 175Ta | 73 | 102 | 174.94374(3) | 10.5(2) h | 7/2+ |  |  |
| 176Ta | 73 | 103 | 175.94486(3) | 8.09(5) h | (1)- |  |  |
| 176m1Ta | 103.0(10) keV | 103.0(10) keV | 103.0(10) keV | 1.1(1) ms | (+) |  |  |
| 176m2Ta | 1372.6(11)+X keV | 1372.6(11)+X keV | 1372.6(11)+X keV | 3.8(4) µs | (14-) |  |  |
| 176m3Ta | 2820(50) keV | 2820(50) keV | 2820(50) keV | 0.97(7) ms | (20-) |  |  |
| 177Ta | 73 | 104 | 176.944472(4) | 56.56(6) h | 7/2+ |  |  |
| 177m1Ta | 73.36(15) keV | 73.36(15) keV | 73.36(15) keV | 410(7) ns | 9/2- |  |  |
| 177m2Ta | 186.15(6) keV | 186.15(6) keV | 186.15(6) keV | 3.62(10) µs | 5/2- |  |  |
| 177m3Ta | 1355.01(19) keV | 1355.01(19) keV | 1355.01(19) keV | 5.31(25) µs | 21/2- |  |  |
| 177m4Ta | 4656.3(5) keV | 4656.3(5) keV | 4656.3(5) keV | 133(4) µs | 49/2- |  |  |
| 178Ta | 73 | 105 | 177.945778(16) | 9.31(3) min | 1+ |  |  |
| 178m1Ta | 100(50)# keV | 100(50)# keV | 100(50)# keV | 2.36(8) h | (7)- |  |  |
| 178m2Ta | 1570(50)# keV | 1570(50)# keV | 1570(50)# keV | 59(3) ms | (15-) |  |  |
| 178m3Ta | 3000(50)# keV | 3000(50)# keV | 3000(50)# keV | 290(12) ms | (21-) |  |  |
| 179Ta | 73 | 106 | 178.9459295(23) | 1.82(3) a | 7/2+ |  |  |
| 179m1Ta | 30.7(1) keV | 30.7(1) keV | 30.7(1) keV | 1.42(8) µs | (9/2)- |  |  |
| 179m2Ta | 520.23(18) keV | 520.23(18) keV | 520.23(18) keV | 335(45) ns | (1/2)+ |  |  |
| 179m3Ta | 1252.61(23) keV | 1252.61(23) keV | 1252.61(23) keV | 322(16) ns | (21/2-) |  |  |
| 179m4Ta | 1317.3(4) keV | 1317.3(4) keV | 1317.3(4) keV | 9.0(2) ms | (25/2+) |  |  |
| 179m5Ta | 1327.9(4) keV | 1327.9(4) keV | 1327.9(4) keV | 1.6(4) µs | (23/2-) |  |  |
| 179m6Ta | 2639.3(5) keV | 2639.3(5) keV | 2639.3(5) keV | 54.1(17) ms | (37/2+) |  |  |
| 180Ta | 73 | 107 | 179.9474648(24) | 8.152(6) h | 1+ |  |  |
| 180m1Ta | 77.1(8) keV | 77.1(8) keV | 77.1(8) keV | >1.2E+15 a | 9- | 0.00012(2) |  |
| 180m2Ta | 1452.40(18) keV | 1452.40(18) keV | 1452.40(18) keV | 31.2(14) µs | 15- |  |  |
| 180m3Ta | 3679.0(11) keV | 3679.0(11) keV | 3679.0(11) keV | 2.0(5) µs | (22-) |  |  |
| 180m4Ta | 4171.0+X keV | 4171.0+X keV | 4171.0+X keV | 17(5) µs | (23,24,25) |  |  |
| 181Ta | 73 | 108 | 180.9479958(19) | STABLE | 7/2+ | 0.99988(2) |  |
| 181m1Ta | 6.238(20) keV | 6.238(20) keV | 6.238(20) keV | 6.05(12) µs | 9/2- |  |  |
| 181m2Ta | 615.21(3) keV | 615.21(3) keV | 615.21(3) keV | 18(1) µs | 1/2+ |  |  |
| 181m3Ta | 1485(3) keV | 1485(3) keV | 1485(3) keV | 25(2) µs | 21/2- |  |  |
| 181m4Ta | 2230(3) keV | 2230(3) keV | 2230(3) keV | 210(20) µs | 29/2- |  |  |
| 182Ta | 73 | 109 | 181.9501518(19) | 114.43(3) d | 3- |  |  |
| 182m1Ta | 16.263(3) keV | 16.263(3) keV | 16.263(3) keV | 283(3) ms | 5+ |  |  |
| 182m2Ta | 519.572(18) keV | 519.572(18) keV | 519.572(18) keV | 15.84(10) min | 10- |  |  |
| 183Ta | 73 | 110 | 182.9513726(19) | 5.1(1) d | 7/2+ |  |  |
| 183mTa | 73.174(12) keV | 73.174(12) keV | 73.174(12) keV | 107(11) ns | 9/2- |  |  |
| 184Ta | 73 | 111 | 183.954008(28) | 8.7(1) h | (5-) |  |  |
| 185Ta | 73 | 112 | 184.955559(15) | 49.4(15) min | (7/2+)# |  |  |
| 185mTa | 1308(29) keV | 1308(29) keV | 1308(29) keV | >1 ms | (21/2-) |  |  |
| 186Ta | 73 | 113 | 185.95855(6) | 10.5(3) min | (2-,3-) |  |  |
| 186mTa |  |  |  | 1.54(5) min |  |  |  |
| 187Ta | 73 | 114 | 186.96053(21)# | 2# min [>300 ns] | 7/2+# |  |  |
| 188Ta | 73 | 115 | 187.96370(21)# | 20# s [>300 ns] |  |  |  |
| 189Ta | 73 | 116 | 188.96583(32)# | 3# s [>300 ns] | 7/2+# |  |  |
| 190Ta | 73 | 117 | 189.96923(43)# | 0.3# s |  |  |  |