ランタンの同位体
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) |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 117La | 57 | 60 | 116.95007(43)# | 23.5(26) ms | (3/2+,3/2-) |  |  |
| 117mLa | 151(12) keV | 151(12) keV | 151(12) keV | 10(5) ms | (9/2+) |  |  |
| 118La | 57 | 61 | 117.94673(32)# | 200# ms |  |  |  |
| 119La | 57 | 62 | 118.94099(43)# | 1# s | 11/2-# |  |  |
| 120La | 57 | 63 | 119.93807(54)# | 2.8(2) s |  |  |  |
| 121La | 57 | 64 | 120.93301(54)# | 5.3(2) s | 11/2-# |  |  |
| 122La | 57 | 65 | 121.93071(32)# | 8.6(5) s |  |  |  |
| 123La | 57 | 66 | 122.92624(21)# | 17(3) s | 11/2-# |  |  |
| 124La | 57 | 67 | 123.92457(6) | 29.21(17) s | (7-,8-) |  |  |
| 124mLa | 100(100)# keV | 100(100)# keV | 100(100)# keV | 21(4) s | low(+#) |  |  |
| 125La | 57 | 68 | 124.920816(28) | 64.8(12) s | (11/2-) |  |  |
| 125mLa | 107.0(10) keV | 107.0(10) keV | 107.0(10) keV | 390(40) ms | (3/2+) |  |  |
| 126La | 57 | 69 | 125.91951(10) | 54(2) s | (5)(+#) |  |  |
| 126mLa | 210(410) keV | 210(410) keV | 210(410) keV | 20(20) s | (0-,1-,2-) |  |  |
| 127La | 57 | 70 | 126.916375(28) | 5.1(1) min | (11/2-) |  |  |
| 127mLa | 14.8(12) keV | 14.8(12) keV | 14.8(12) keV | 3.7(4) min | (3/2+) |  |  |
| 128La | 57 | 71 | 127.91559(6) | 5.18(14) min | (5+) |  |  |
| 128mLa | 100(100)# keV | 100(100)# keV | 100(100)# keV | <1.4 min | (1+,2-) |  |  |
| 129La | 57 | 72 | 128.912693(22) | 11.6(2) min | 3/2+ |  |  |
| 129mLa | 172.1(4) keV | 172.1(4) keV | 172.1(4) keV | 560(50) ms | 11/2- |  |  |
| 130La | 57 | 73 | 129.912369(28) | 8.7(1) min | 3(+) |  |  |
| 131La | 57 | 74 | 130.91007(3) | 59(2) min | 3/2+ |  |  |
| 131mLa | 304.52(24) keV | 304.52(24) keV | 304.52(24) keV | 170(10) µs | 11/2- |  |  |
| 132La | 57 | 75 | 131.91010(4) | 4.8(2) h | 2- |  |  |
| 132mLa | 188.18(11) keV | 188.18(11) keV | 188.18(11) keV | 24.3(5) min | 6- |  |  |
| 133La | 57 | 76 | 132.90822(3) | 3.912(8) h | 5/2+ |  |  |
| 134La | 57 | 77 | 133.908514(21) | 6.45(16) min | 1+ |  |  |
| 135La | 57 | 78 | 134.906977(11) | 19.5(2) h | 5/2+ |  |  |
| 136La | 57 | 79 | 135.90764(6) | 9.87(3) min | 1+ |  |  |
| 136mLa | 255(9) keV | 255(9) keV | 255(9) keV | 114(3) ms | (8)(-#) |  |  |
| 137La | 57 | 80 | 136.906494(14) | 6(2)E+4 a | 7/2+ |  |  |
| 138La | 57 | 81 | 137.907112(4) | 1.02(1)E+11 a | 5+ | 0.00090(1) |  |
| 138mLa | 72.57(3) keV | 72.57(3) keV | 72.57(3) keV | 116(5) ns | (3)+ |  |  |
| 139La | 57 | 82 | 138.9063533(26) | STABLE | 7/2+ | 0.99910(1) |  |
| 140La | 57 | 83 | 139.9094776(26) | 1.6781(3) d | 3- |  |  |
| 141La | 57 | 84 | 140.910962(5) | 3.92(3) h | (7/2+) |  |  |
| 142La | 57 | 85 | 141.914079(6) | 91.1(5) min | 2- |  |  |
| 143La | 57 | 86 | 142.916063(17) | 14.2(1) min | (7/2)+ |  |  |
| 144La | 57 | 87 | 143.91960(5) | 40.8(4) s | (3-) |  |  |
| 145La | 57 | 88 | 144.92165(10) | 24.8(20) s | (5/2+) |  |  |
| 146La | 57 | 89 | 145.92579(8) | 6.27(10) s | 2- |  |  |
| 146mLa | 130(130) keV | 130(130) keV | 130(130) keV | 10.0(1) s | (6-) |  |  |
| 147La | 57 | 90 | 146.92824(5) | 4.015(8) s | (5/2+) |  |  |
| 148La | 57 | 91 | 147.93223(6) | 1.26(8) s | (2-) |  |  |
| 149La | 57 | 92 | 148.93473(34)# | 1.05(3) s | 5/2+# |  |  |
| 150La | 57 | 93 | 149.93877(43)# | 510(30) ms | (3+) |  |  |
| 151La | 57 | 94 | 150.94172(43)# | 300# ms [>300 ns] | 5/2+# |  |  |
| 152La | 57 | 95 | 151.94625(43)# | 200# ms [>300 ns] |  |  |  |
| 153La | 57 | 96 | 152.94962(64)# | 150# ms [>300 ns] | 5/2+# |  |  |
| 154La | 57 | 97 | 153.95450(64)# | 100# ms |  |  |  |
| 155La | 57 | 98 | 154.95835(86)# | 60# ms | 5/2+# |  |  |