ニオブの同位体
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 |
| --- | --- | --- | --- | --- | --- | --- |
| 81Nb | 41 | 40 | 80.94903(161)# | <44 ns | 3/2-# |  |
| 82Nb | 41 | 41 | 81.94313(32)# | 51(5) ms | 0+ |  |
| 83Nb | 41 | 42 | 82.93671(34) | 4.1(3) s | (5/2+) |  |
| 84Nb | 41 | 43 | 83.93357(32)# | 9.8(9) s | 3+ |  |
| 84mNb | 338(10) keV | 338(10) keV | 338(10) keV | 103(19) ns | (5-) |  |
| 85Nb | 41 | 44 | 84.92791(24) | 20.9(7) s | (9/2+) |  |
| 85mNb | 759.0(10) keV | 759.0(10) keV | 759.0(10) keV | 12(5) s | (1/2-) |  |
| 86Nb | 41 | 45 | 85.92504(9) | 88(1) s | (6+) |  |
| 86mNb | 250(160)# keV | 250(160)# keV | 250(160)# keV | 56(8) s | high |  |
| 87Nb | 41 | 46 | 86.92036(7) | 3.75(9) min | (1/2-) |  |
| 87mNb | 3.84(14) keV | 3.84(14) keV | 3.84(14) keV | 2.6(1) min | (9/2+)# |  |
| 88Nb | 41 | 47 | 87.91833(11) | 14.55(6) min | (8+) |  |
| 88mNb | 40(140) keV | 40(140) keV | 40(140) keV | 7.8(1) min | (4-) |  |
| 89Nb | 41 | 48 | 88.913418(29) | 2.03(7) h | (9/2+) |  |
| 89mNb | 0(30)# keV | 0(30)# keV | 0(30)# keV | 1.10(3) h | (1/2)- |  |
| 90Nb | 41 | 49 | 89.911265(5) | 14.60(5) h | 8+ |  |
| 90m1Nb | 122.370(22) keV | 122.370(22) keV | 122.370(22) keV | 63(2) µs | 6+ |  |
| 90m2Nb | 124.67(25) keV | 124.67(25) keV | 124.67(25) keV | 18.81(6) s | 4- |  |
| 90m3Nb | 171.10(10) keV | 171.10(10) keV | 171.10(10) keV | <1 µs | 7+ |  |
| 90m4Nb | 382.01(25) keV | 382.01(25) keV | 382.01(25) keV | 6.19(8) ms | 1+ |  |
| 90m5Nb | 1880.21(20) keV | 1880.21(20) keV | 1880.21(20) keV | 472(13) ns | (11-) |  |
| 91Nb | 41 | 50 | 90.906996(4) | 680(130) a | 9/2+ |  |
| 91m1Nb | 104.60(5) keV | 104.60(5) keV | 104.60(5) keV | 60.86(22) d | 1/2- |  |
| 91m2Nb | 2034.35(19) keV | 2034.35(19) keV | 2034.35(19) keV | 3.76(12) µs | (17/2-) |  |
| 92Nb | 41 | 51 | 91.907194(3) | 3.47(24)E+7 a | (7)+ |  |
| 92m1Nb | 135.5(4) keV | 135.5(4) keV | 135.5(4) keV | 10.15(2) d | (2)+ |  |
| 92m2Nb | 225.7(4) keV | 225.7(4) keV | 225.7(4) keV | 5.9(2) µs | (2)- |  |
| 92m3Nb | 2203.3(4) keV | 2203.3(4) keV | 2203.3(4) keV | 167(4) ns | (11-) |  |
| 93Nb | 41 | 52 | 92.9063781(26) | STABLE | 9/2+ | 1.0000 |
| 93mNb | 30.77(2) keV | 30.77(2) keV | 30.77(2) keV | 16.13(14) a | 1/2- |  |
| 94Nb | 41 | 53 | 93.9072839(26) | 2.03(16)E+4 a | (6)+ |  |
| 94mNb | 40.902(12) keV | 40.902(12) keV | 40.902(12) keV | 6.263(4) min | 3+ |  |
| 95Nb | 41 | 54 | 94.9068358(21) | 34.991(6) d | 9/2+ |  |
| 95mNb | 235.690(20) keV | 235.690(20) keV | 235.690(20) keV | 3.61(3) d | 1/2- |  |
| 96Nb | 41 | 55 | 95.908101(4) | 23.35(5) h | 6+ |  |
| 97Nb | 41 | 56 | 96.9080986(27) | 72.1(7) min | 9/2+ |  |
| 97mNb | 743.35(3) keV | 743.35(3) keV | 743.35(3) keV | 52.7(18) s | 1/2- |  |
| 98Nb | 41 | 57 | 97.910328(6) | 2.86(6) s | 1+ |  |
| 98mNb | 84(4) keV | 84(4) keV | 84(4) keV | 51.3(4) min | (5+) |  |
| 99Nb | 41 | 58 | 98.911618(14) | 15.0(2) s | 9/2+ |  |
| 99mNb | 365.29(14) keV | 365.29(14) keV | 365.29(14) keV | 2.6(2) min | 1/2- |  |
| 100Nb | 41 | 59 | 99.914182(28) | 1.5(2) s | 1+ |  |
| 100mNb | 470(40) keV | 470(40) keV | 470(40) keV | 2.99(11) s | (4+,5+) |  |
| 101Nb | 41 | 60 | 100.915252(20) | 7.1(3) s | (5/2#)+ |  |
| 102Nb | 41 | 61 | 101.91804(4) | 1.3(2) s | 1+ |  |
| 102mNb | 130(50) keV | 130(50) keV | 130(50) keV | 4.3(4) s | high |  |
| 103Nb | 41 | 62 | 102.91914(7) | 1.5(2) s | (5/2+) |  |
| 104Nb | 41 | 63 | 103.92246(11) | 4.9(3) s | (1+) |  |
| 104mNb | 220(120) keV | 220(120) keV | 220(120) keV | 940(40) ms | high |  |
| 105Nb | 41 | 64 | 104.92394(11) | 2.95(6) s | (5/2+)# |  |
| 106Nb | 41 | 65 | 105.92797(21)# | 920(40) ms | 2+# |  |
| 107Nb | 41 | 66 | 106.93031(43)# | 300(9) ms | 5/2+# |  |
| 108Nb | 41 | 67 | 107.93484(32)# | 0.193(17) s | (2+) |  |
| 109Nb | 41 | 68 | 108.93763(54)# | 190(30) ms | 5/2+# |  |
| 110Nb | 41 | 69 | 109.94244(54)# | 170(20) ms | 2+# |  |
| 111Nb | 41 | 70 | 110.94565(54)# | 80# ms [>300 ns] | 5/2+# |  |
| 112Nb | 41 | 71 | 111.95083(75)# | 60# ms [>300 ns] | 2+# |  |
| 113Nb | 41 | 72 | 112.95470(86)# | 30# ms [>300 ns] | 5/2+# |  |