WikiDer > Isotope von Lanthan
Isotopen van lanthaan
Es Chemisches ElementLanthan (La), mit a Atommasse ab 138.90547(7) Sie, besitzt 1 Stall Isotop: 139La, mit a reichlich von 99,9 %. Das andere natürlich vorkommende Isotop ist das Radioisotop 138La. Die 38 Radioisotope sind instabil und haben eine relativ kurze halbes Leben (die meisten weniger als eins zweite).
Das kurzlebige Isotop von Lanthan ist 117La, mit einer Halbwertszeit von etwa 23,5 Millisekunden. Die langlebigste ist 138La, mit einer Halbwertszeit von 102 MilliardeJahr. Dieses Isotop ist ein radioaktives Urnuklid das in kleinen Mengen Boden auftritt (0,09 %). Es verfällt für 66,4% bis β-zerfallen zum stabilen Isotop Barium-138 und für 33,6% durch β−-zerfallen zum stabilen Isotop Cer-138:[1]
Überblick
| Nuklid | Z (p) | N (nein) | Isotope Masse (u) | halbes Leben | Radioaktiver Zerfall | VP | Kernspin | Isotopenverhältnis (Molenbruch) | Natürliches Vorkommen (Molbruch) |
|---|---|---|---|---|---|---|---|---|---|
| Anregungsenergie | |||||||||
| 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) | 200ms | β | 118ba | |||
| 119La | 57 | 62 | 118,94099(43) | 1 s | β | 119ba | 11/2− | ||
| 120La | 57 | 63 | 119,93807(54) | 2,8 (2) Sek. | 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 | |||||||
| 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) Minuten | β | 127ba | (11/2−) | ||
| 127mLa | 14,8(12) keV | 3,7(4) Minuten | β | 127ba | (3/2) | ||||
| ES | 127La | ||||||||
| 128La | 57 | 71 | 127,91559(6) | 5,18(14) min | β | 128ba | (5) | ||
| 128mLa | 100(100) keV | < 1,4 min | ES | 128La | (1, 2−) | ||||
| 129La | 57 | 72 | 128,912693(22) | 11,6 (2) Minuten | β | 129ba | 3/2 | ||
| 129mLa | 172,1(4) keV | 560(50) ms | ES | 129La | 11/2− | ||||
| 130La | 57 | 73 | 129,912369(28) | 8,7(1) Minuten | β | 130ba | 3 | ||
| 131La | 57 | 74 | 130,91007(3) | 59(2) Minuten | β | 131ba | 3/2 | ||
| 131mLa | 304,52(24) keV | 170(10) µs | 11/2− | ||||||
| 132La | 57 | 75 | 131,91010(4) | 4.8(2) Stunden | 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) Stunden | β | 133ba | 5/2 | ||
| 134La | 57 | 77 | 133,908514(21) | 6,45(16) Minuten | β | 134ba | 1 | ||
| 135La | 57 | 78 | 134,906977(11) | 19,5 (2) Stunden | β | 135ba | 5/2 | ||
| 136La | 57 | 79 | 135,90764(6) | 9,87(3) min | β | 136ba | 1 | ||
| 136mLa | 255(9) keV | 114(3) ms | ES | 136La | (8−) | ||||
| 137La | 57 | 80 | 136,906494(14) | 6(2)E × 104 Jahr | EV | 137ba | 7/2 | ||
| 138La | 57 | 81 | 137,907112(4) | 1,02(1) × 1011 Jahr | 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) | stabil | 7/2 | 0,99910(1) | |||
| 140La | 57 | 83 | 139,9094776(26) | 1.6781(3) Tage | β− | 140Ce | 3− | ||
| 141La | 57 | 84 | 140,910962(5) | 3,92(3) Stunden | 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) Minuten | β− | 143Ce | 7/2 | ||
| 144La | 57 | 87 | 143,91960(5) | 40,8(4) Sek. | 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−, nein (0,007%) | 145Ce | ||||||||
| 146mLa | 130(130) keV | 10,0(1) Sek. | β− | 146Ce | (6−) | ||||
| 147La | 57 | 90 | 146,92824(5) | 4.015(8) s | β− (99,96%) | 147Ce | (5/2) | ||
| β−, n (0,04 %) | 146Ce | ||||||||
| 148La | 57 | 91 | 147,93223(6) | 1,26(8) s | β− (99,85%) | 148Ce | (2−) | ||
| β−, n (0,15%) | 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) | 300ms | β− | 151Ce | 5/2 | ||
| 152La | 57 | 95 | 151,94625(43) | 200ms | β− | 152Ce | |||
| 153La | 57 | 96 | 152,94962(64) | 150ms | β− | 153Ce | 5/2 | ||
| 154La | 57 | 97 | 153,95450(64) | 100ms | β− | 154Ce | |||
| 155La | 57 | 98 | 154,95835(86) | 60ms | β− | 155Ce | 5/2 | ||
Übersicht der Isotope pro Element
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