镧的同位素
镧（原子量：138.90547(7)）的同位素，其中有1个同位素是稳定的。
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| 标准原子质量 (Ar, 标准) |
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图表
编辑| 符号 | Z | N | 同位素质量（u） [n 1][n 2] |
半衰期 [n 1][n 2][n 3] |
衰变 方式[2] |
衰变 产物 [n 4][n 5] |
原子核 自旋[n 1] |
相对丰度 （莫耳分率）[n 2] |
相对丰度 的变化量 （莫耳分率） |
|---|---|---|---|---|---|---|---|---|---|
| 激发能量[n 1][n 2] | |||||||||
| 116La[3] | 57 | 59 | 50(22) ms | p（~60%） | 115Ba | ||||
| β+（~40%） | 116Ba | ||||||||
| 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)×104 a | ε | 137Ba | 7/2+ | ||
| 138La[n 6] | 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[n 7] | 57 | 82 | 138.9063533(26) | 稳定 | 7/2+ | 0.99910(1) | |||
| 140La[n 7] | 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 [>300 ns] | β− | 151Ce | 5/2+# | ||
| 152La | 57 | 95 | 151.94625(43)# | 200# ms [>300 ns] | β− | 152Ce | |||
| 153La | 57 | 96 | 152.94962(64)# | 150# ms [>300 ns] | 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+# | ||
- ^ 1.0 1.1 1.2 1.3 画上#号的数据代表没有经过实验的证明，仅为理论推测。
- ^ 2.0 2.1 2.2 2.3 用括号括起来的数据代表不确定性。
- ^ 半衰期超过5亿年的同位素以粗体表示。
- ^ 稳定的衰变产物以粗体表示。
- ^ 半衰期超过5亿年的衰变产物以粗斜体表示。
- ^ 原生放射性同位素
- ^ 7.0 7.1 裂变产物
| ← | 同位素列表 | → |
| 钡的同位素 | 镧的同位素 | 铈的同位素 |
参考文献
编辑- ^ Meija, Juris; et al. Atomic weights of the elements 2013 (IUPAC Technical Report). Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.
- ^ Universal Nuclide Chart. nucleonica. [2015-09-19]. （原始内容
存档于2017-02-19）.
- ^ Zhang, Wei; Cederwall, Bo; Aktas, Özge; Liu, Xiaoyu; Ertoprak, Aysegül; Nyberg, Ayse; Auranen, Kalle; Alayed, Betool; Badran, Hussam; Boston, Helen; Doncel, Maria; Forsberg, Ulrika; Grahn, Tuomas; Greenlees, Paul T.; Guo, Song; Heery, Jacob; Hilton, Joshua; Jenkins, David; Julin, Rauno; Juutinen, Sakari; Luoma, Minna; Neuvonen, Olavi; Ojala, Joonas; Page, Robert D.; Pakarinen, Janne; Partanen, Jari; Paul, Edward S.; Petrache, Costel; Rahkila, Panu; Ruotsalainen, Panu; Sandzelius, Mikael; Sarén, Jan; Szwec, Stuart; Tann, Holly; Uusitalo, Juha; Wadsworth, Robert. Observation of the proton emitter 116
57La
59 (PDF). Communications Physics. 14 November 2022, 5 (1): 1–8. ISSN 2399-3650. S2CID 253512231. doi:10.1038/s42005-022-01069-w
.
- Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
- Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report) （页面存档备份，存于互联网档案馆）. Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005) （页面存档备份，存于互联网档案馆）.
- Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
- Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties （页面存档备份，存于互联网档案馆）, Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database （页面存档备份，存于互联网档案馆） (retrieved Sept. 2005).
- David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.