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 | |||||||||
| 117La | 57 | 60 | 116.95007(43)# | 23.5(26) ms | β+ | 117Ba | (3/2+,3/2−) | ||
| p | 116Ba | ||||||||
| 117mLa | 151(12) keV | 10(5) ms | (9/2+) | ||||||
| 118La | 57 | 61 | 117.94673(32)# | 200# ms | β+ | 118Ba | |||
| 119La | 57 | 62 | 118.94099(43)# | 1# s | β+ | 119Ba | 11/2−# | ||
| 120La | 57 | 63 | 119.93807(54)# | 2.8(2) s | β+ | 120Ba | |||
| β+, p | 119Cs | ||||||||
| 121La | 57 | 64 | 120.93301(54)# | 5.3(2) s | β+ | 121Ba | 11/2−# | ||
| β+, p | 120Cs | ||||||||
| 122La | 57 | 65 | 121.93071(32)# | 8.6(5) s | β+ | 122Ba | |||
| β+, p | 121Cs | ||||||||
| 123La | 57 | 66 | 122.92624(21)# | 17(3) s | β+ | 123Ba | 11/2−# | ||
| 124La | 57 | 67 | 123.92457(6) | 29.21(17) s | β+ | 124Ba | (7−,8−) | ||
| 124mLa | 100(100)# keV | 21(4) s | low(+#) | ||||||
| 125La | 57 | 68 | 124.920816(28) | 64.8(12) s | β+ | 125Ba | (11/2−) | ||
| 125mLa | 107.0(10) keV | 390(40) ms | (3/2+) | ||||||
| 126La | 57 | 69 | 125.91951(10) | 54(2) s | β+ | 126Ba | (5)(+#) | ||
| 126mLa | 210(410) keV | 20(20) s | (0−,1−,2−) | ||||||
| 127La | 57 | 70 | 126.916375(28) | 5.1(1) min | β+ | 127Ba | (11/2−) | ||
| 127mLa | 14.8(12) keV | 3.7(4) min | β+ | 127Ba | (3/2+) | ||||
| IT | 127La | ||||||||
| 128La | 57 | 71 | 127.91559(6) | 5.18(14) min | β+ | 128Ba | (5+) | ||
| 128mLa | 100(100)# keV | <1.4 min | IT | 128La | (1+,2−) | ||||
| 129La | 57 | 72 | 128.912693(22) | 11.6(2) min | β+ | 129Ba | 3/2+ | ||
| 129mLa | 172.1(4) keV | 560(50) ms | IT | 129La | 11/2− | ||||
| 130La | 57 | 73 | 129.912369(28) | 8.7(1) min | β+ | 130Ba | 3(+) | ||
| 131La | 57 | 74 | 130.91007(3) | 59(2) min | β+ | 131Ba | 3/2+ | ||
| 131mLa | 304.52(24) keV | 170(10) µs | 11/2− | ||||||
| 132La | 57 | 75 | 131.91010(4) | 4.8(2) h | β+ | 132Ba | 2− | ||
| 132mLa | 188.18(11) keV | 24.3(5) min | IT (76%) | 132La | 6− | ||||
| β+ (24%) | 132Ba | ||||||||
| 133La | 57 | 76 | 132.90822(3) | 3.912(8) h | β+ | 133Ba | 5/2+ | ||
| 134La | 57 | 77 | 133.908514(21) | 6.45(16) min | β+ | 134Ba | 1+ | ||
| 135La | 57 | 78 | 134.906977(11) | 19.5(2) h | β+ | 135Ba | 5/2+ | ||
| 136La | 57 | 79 | 135.90764(6) | 9.87(3) min | β+ | 136Ba | 1+ | ||
| 136mLa | 255(9) keV | 114(3) ms | IT | 136La | (8)(−#) | ||||
| 137La | 57 | 80 | 136.906494(14) | 6(2)E×104 a | EC | 137Ba | 7/2+ | ||
| 138La | 57 | 81 | 137.907112(4) | 1.02(1)×1011 a | β+ (66.4%) | 138Ba | 5+ | 9.0(1)×10−4 | |
| β- (33.6%) | 138Ce | ||||||||
| 138mLa | 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 | β- | 140Ce | 3− | ||
| 141La | 57 | 84 | 140.910962(5) | 3.92(3) h | β- | 141Ce | (7/2+) | ||
| 142La | 57 | 85 | 141.914079(6) | 91.1(5) min | β- | 142Ce | 2− | ||
| 143La | 57 | 86 | 142.916063(17) | 14.2(1) min | β- | 143Ce | (7/2)+ | ||
| 144La | 57 | 87 | 143.91960(5) | 40.8(4) s | β- | 144Ce | (3−) | ||
| 145La | 57 | 88 | 144.92165(10) | 24.8(20) s | β- | 145Ce | (5/2+) | ||
| 146La | 57 | 89 | 145.92579(8) | 6.27(10) s | β- (99.99%) | 146Ce | 2− | ||
| β-, n (.007%) | 145Ce | ||||||||
| 146mLa | 130(130) keV | 10.0(1) s | β- | 146Ce | (6−) | ||||
| 147La | 57 | 90 | 146.92824(5) | 4.015(8) s | β- (99.96%) | 147Ce | (5/2+) | ||
| β-, n (.04%) | 146Ce | ||||||||
| 148La | 57 | 91 | 147.93223(6) | 1.26(8) s | β- (99.85%) | 148Ce | (2−) | ||
| β-, n (.15%) | 147Ce | ||||||||
| 149La | 57 | 92 | 148.93473(34)# | 1.05(3) s | β- (98.6%) | 149Ce | 5/2+# | ||
| β-, n (1.4%) | 148Ce | ||||||||
| 150La | 57 | 93 | 149.93877(43)# | 510(30) ms | β- (97.3%) | 150Ce | (3+) | ||
| β-, n (2.7%) | 149Ce | ||||||||
| 151La | 57 | 94 | 150.94172(43)# | 300# ms | β- | 151Ce | 5/2+# | ||
| 152La | 57 | 95 | 151.94625(43)# | 200# ms | β- | 152Ce | |||
| 153La | 57 | 96 | 152.94962(64)# | 150# ms | β- | 153Ce | 5/2+# | ||
| 154La | 57 | 97 | 153.95450(64)# | 100# ms | β- | 154Ce | |||
| 155La | 57 | 98 | 154.95835(86)# | 60# ms | β- | 155Ce | 5/2+# | ||
Read more about this topic: Isotopes Of Lanthanum
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