鑭嘅同位素
鑭嘅同位素大部分都唔穩定，得1個係穩定（139La）。有兩隻鑭嘅同位素半衰期超過1000年，分別係138La同137La，但係兩者之中只係前者（138La）存在喺自然界之中，豐度約莫係0.001，半衰期係1.02×1011年，而後者（137La）半衰期係6×104年。
圖表
編輯| 符號 | Z（p） | N（n） | 質量（u） | 半衰期 | 原子核自旋 | 相對豐度 | 相對豐度的變化率 |
|---|---|---|---|---|---|---|---|
| 激發能量 | |||||||
| 117La | 57 | 60 | 116.95007(43)# | 23.5(26) ms | (3/2+,3/2-) | ||
| 117mLa | 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 | 21(4) s | low(+#) | ||||
| 125La | 57 | 68 | 124.920816(28) | 64.8(12) s | (11/2-) | ||
| 125mLa | 107.0(10) keV | 390(40) ms | (3/2+) | ||||
| 126La | 57 | 69 | 125.91951(10) | 54(2) s | (5)(+#) | ||
| 126mLa | 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 | 3.7(4) min | (3/2+) | ||||
| 128La | 57 | 71 | 127.91559(6) | 5.18(14) min | (5+) | ||
| 128mLa | 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 | 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 | 170(10) µs | 11/2- | ||||
| 132La | 57 | 75 | 131.91010(4) | 4.8(2) h | 2- | ||
| 132mLa | 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 | 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 | 116(5) ns | (3)+ | ||||
| 139La | 57 | 82 | 138.9063533(26) | 穩定 | 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 | 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+# | ||
備註：有#嘅數據代表冇經過實驗嘅證明，只係理論推測，而用咗括號括係代表數據唔確定。
參攷
編輯- 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). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005).
- 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, Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (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.
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