Isotop lantanum
Lantanum (57La) yang terbentuk secara alami terdiri dari satu isotop stabil (139La) dan satu isotop radioaktif (138La), dengan isotop yang stabil, 139La, menjadi yang paling melimpah (99,91% kelimpahan alami). Ada 38 radioisotop yang telah dikarakterisasi, dengan yang paling stabil adalah 138La, dengan waktu paruh 1,02 tahun; 137La, dengan waktu paruh 60.000 tahun; dan 140La, dengan waktu paruh 1,6781 hari. Isotop radioaktif yang tersisa memiliki waktu paruh kurang dari satu hari dan sebagian besar memiliki waktu paruh kurang dari 1 menit. Unsur ini juga memiliki 12 isomer nuklir, yang berumur paling panjang adalah 132mLa, dengan waktu paruh 24,3 menit.
Isotop lantanum memiliki berat atom berkisar dari 116,95 u (117La) hingga 154,96 u (155La).
Daftar isotop
| rowspan=2|117La | rowspan=2 style="text-align:right" | 57 | rowspan=2 style="text-align:right" | 60 | rowspan=2|116,95007(43)# | rowspan=2|23,5(26) mdtk | β+ | 117Ba | rowspan=2|(3/2+, 3/2−) | rowspan=2| | rowspan=2|
| p | 116Ba
| style="text-indent:1em" | 117mLa | colspan="3" style="text-indent:2em" | 151(12) keV | 10(5) mdtk | | | (9/2+) | |
| 118La | style="text-align:right" | 57 | style="text-align:right" | 61 | 117,94673(32)# | 200# mdtk | β+ | 118Ba | | |
| 119La | style="text-align:right" | 57 | style="text-align:right" | 62 | 118,94099(43)# | 1# dtk | β+ | 119Ba | 11/2−# | |
| rowspan=2|120La | rowspan=2 style="text-align:right" | 57 | rowspan=2 style="text-align:right" | 63 | rowspan=2|119,93807(54)# | rowspan=2|2,8(2) dtk | β+ | 120Ba | rowspan=2| | rowspan=2| | rowspan=2|
| β+, p | 119Cs
| rowspan=2|121La | rowspan=2 style="text-align:right" | 57 | rowspan=2 style="text-align:right" | 64 | rowspan=2|120,93301(54)# | rowspan=2|5,3(2) dtk | β+ | 121Ba | rowspan=2|11/2−# | rowspan=2| | rowspan=2|
| β+, p | 120Cs
| rowspan=2|122La | rowspan=2 style="text-align:right" | 57 | rowspan=2 style="text-align:right" | 65 | rowspan=2|121,93071(32)# | rowspan=2|8,6(5) dtk | β+ | 122Ba | rowspan=2| | rowspan=2| | rowspan=2|
| β+, p | 121Cs
| 123La | style="text-align:right" | 57 | style="text-align:right" | 66 | 122,92624(21)# | 17(3) dtk | β+ | 123Ba | 11/2−# | |
| 124La | style="text-align:right" | 57 | style="text-align:right" | 67 | 123,92457(6) | 29,21(17) dtk | β+ | 124Ba | (7−, 8−) | |
| style="text-indent:1em" | 124mLa | colspan="3" style="text-indent:2em" | 100(100)# keV | 21(4) dtk | | | low(+#) | |
| 125La | style="text-align:right" | 57 | style="text-align:right" | 68 | 124,920816(28) | 64,8(12) dtk | β+ | 125Ba | (11/2−) | |
| style="text-indent:1em" | 125mLa | colspan="3" style="text-indent:2em" | 107,0(10) keV | 390(40) mdtk | | | (3/2+) | |
| 126La | style="text-align:right" | 57 | style="text-align:right" | 69 | 125,91951(10) | 54(2) dtk | β+ | 126Ba | (5)(+#) | |
| style="text-indent:1em" | 126mLa | colspan="3" style="text-indent:2em" | 210(410) keV | 20(20) dtk | | | (0−, 1−, 2−) | |
| 127La | style="text-align:right" | 57 | style="text-align:right" | 70 | 126,916375(28) | 5,1(1) mnt | β+ | 127Ba | (11/2−) | |
| rowspan=2 style="text-indent:1em" | 127mLa | rowspan=2 colspan="3" style="text-indent:2em" | 14,8(12) keV | rowspan=2|3,7(4) mnt | β+ | 127Ba | rowspan=2|(3/2+) | rowspan=2| | rowspan=2|
| IT | 127La
| 128La | style="text-align:right" | 57 | style="text-align:right" | 71 | 127,91559(6) | 5,18(14) mnt | β+ | 128Ba | (5+) | |
| style="text-indent:1em" | 128mLa | colspan="3" style="text-indent:2em" | 100(100)# keV | <1,4 mnt | IT | 128La | (1+, 2−) | |
| 129La | style="text-align:right" | 57 | style="text-align:right" | 72 | 128,912693(22) | 11,6(2) mnt | β+ | 129Ba | 3/2+ | |
| style="text-indent:1em" | 129mLa | colspan="3" style="text-indent:2em" | 172,1(4) keV | 560(50) mdtk | IT | 129La | 11/2− | |
| 130La | style="text-align:right" | 57 | style="text-align:right" | 73 | 129,912369(28) | 8,7(1) mnt | β+ | 130Ba | 3(+) | |
| 131La | style="text-align:right" | 57 | style="text-align:right" | 74 | 130,91007(3) | 59(2) mnt | β+ | 131Ba | 3/2+ | |
| style="text-indent:1em" | 131mLa | colspan="3" style="text-indent:2em" | 304,52(24) keV | 170(10) μdtk | | | 11/2− | |
| 132La | style="text-align:right" | 57 | style="text-align:right" | 75 | 131,91010(4) | 4,8(2) jam | β+ | 132Ba | 2− | |
| rowspan=2 style="text-indent:1em" | 132mLa | rowspan=2 colspan="3" style="text-indent:2em" | 188,18(11) keV | rowspan=2|24,3(5) mnt | IT (76%) | 132La | rowspan=2|6− | rowspan=2| | rowspan=2|
| β+ (24%) | 132Ba
| 133La | style="text-align:right" | 57 | style="text-align:right" | 76 | 132,90822(3) | 3,912(8) jam | β+ | 133Ba | 5/2+ | |
| 134La | style="text-align:right" | 57 | style="text-align:right" | 77 | 133,908514(21) | 6,45(16) mnt | β+ | 134Ba | 1+ | |
| 135La | style="text-align:right" | 57 | style="text-align:right" | 78 | 134,906977(11) | 19,5(2) jam | β+ | 135Ba | 5/2+ | |
| 136La | style="text-align:right" | 57 | style="text-align:right" | 79 | 135,90764(6) | 9,87(3) mnt | β+ | 136Ba | 1+ | |
| style="text-indent:1em" | 136mLa | colspan="3" style="text-indent:2em" | 255(9) keV | 114(3) mdtk | IT | 136La | (8)(−#) | |
| 137La | style="text-align:right" | 57 | style="text-align:right" | 80 | 136,906494(14) | 6(2) thn | EC | 137Ba | 7/2+ | | | punah
| rowspan=2|138La | rowspan=2 style="text-align:right" | 57 | rowspan=2 style="text-align:right" | 81 | rowspan=2|137,907112(4) | rowspan=2|1,02(1) thn | β+ (66,4%) | 138Ba | rowspan=2|5+ | rowspan=2|9,0(1) | rowspan=2|
| β− (33,6%) | 138Ce
| style="text-indent:1em" | 138mLa | colspan="3" style="text-indent:2em" | 72,57(3) keV | 116(5) ndtk | | | (3)+ | |
| 139La | style="text-align:right" | 57 | style="text-align:right" | 82 | 138,9063533(26) | colspan=3 align=center|Stabil | 7/2+ | 0,99910(1) |
| 140La | style="text-align:right" | 57 | style="text-align:right" | 83 | 139,9094776(26) | 1,6781(3) hri | β− | 140Ce | 3− | |
| 141La | style="text-align:right" | 57 | style="text-align:right" | 84 | 140,910962(5) | 3,92(3) jam | β− | 141Ce | (7/2+) | |
| 142La | style="text-align:right" | 57 | style="text-align:right" | 85 | 141,914079(6) | 91,1(5) mnt | β− | 142Ce | 2− | |
| 143La | style="text-align:right" | 57 | style="text-align:right" | 86 | 142,916063(17) | 14,2(1) mnt | β− | 143Ce | (7/2)+ | |
| 144La | style="text-align:right" | 57 | style="text-align:right" | 87 | 143,91960(5) | 40,8(4) dtk | β− | 144Ce | (3−) | |
| 145La | style="text-align:right" | 57 | style="text-align:right" | 88 | 144,92165(10) | 24,8(20) dtk | β− | 145Ce | (5/2+) | |
| rowspan=2|146La | rowspan=2 style="text-align:right" | 57 | rowspan=2 style="text-align:right" | 89 | rowspan=2|145,92579(8) | rowspan=2|6,27(10) dtk | β− (99,99%) | 146Ce | rowspan=2|2− | rowspan=2| | rowspan=2|
| β−, n (0,007%) | 145Ce
| style="text-indent:1em" | 146mLa | colspan="3" style="text-indent:2em" | 130(130) keV | 10,0(1) dtk | β− | 146Ce | (6−) | |
| rowspan=2|147La | rowspan=2 style="text-align:right" | 57 | rowspan=2 style="text-align:right" | 90 | rowspan=2|146,92824(5) | rowspan=2|4,015(8) dtk | β− (99,96%) | 147Ce | rowspan=2|(5/2+) | rowspan=2| | rowspan=2|
| β−, n (0,04%) | 146Ce
| rowspan=2|148La | rowspan=2 style="text-align:right" | 57 | rowspan=2 style="text-align:right" | 91 | rowspan=2|147,93223(6) | rowspan=2|1,26(8) dtk | β− (99,85%) | 148Ce | rowspan=2|(2−) | rowspan=2| | rowspan=2|
| β−, n (0,15%) | 147Ce
| rowspan=2|149La | rowspan=2 style="text-align:right" | 57 | rowspan=2 style="text-align:right" | 92 | rowspan=2|148,93473(34)# | rowspan=2|1,05(3) dtk | β− (98,6%) | 149Ce | rowspan=2|5/2+# | rowspan=2| | rowspan=2|
| β−, n (1,4%) | 148Ce
| rowspan=2|150La | rowspan=2 style="text-align:right" | 57 | rowspan=2 style="text-align:right" | 93 | rowspan=2|149,93877(43)# | rowspan=2|510(30) mdtk | β− (97,3%) | 150Ce | rowspan=2|(3+) | rowspan=2| | rowspan=2|
| β−, n (2,7%) | 149Ce
| 151La | style="text-align:right" | 57 | style="text-align:right" | 94 | 150,94172(43)# | 300# mdtk [>300 ndtk] | β− | 151Ce | 5/2+# | |
| 152La | style="text-align:right" | 57 | style="text-align:right" | 95 | 151,94625(43)# | 200# mdtk [>300 ndtk] | β− | 152Ce | | |
| 153La | style="text-align:right" | 57 | style="text-align:right" | 96 | 152,94962(64)# | 150# mdtk [>300 ndtk] | β− | 153Ce | 5/2+# | |
| 154La | style="text-align:right" | 57 | style="text-align:right" | 97 | 153,95450(64)# | 100# mdtk | β− | 154Ce | | |
| 155La | style="text-align:right" | 57 | style="text-align:right" | 98 | 154,95835(86)# | 60# mdtk | β− | 155Ce | 5/2+# | |
Referensi
- Massa isotop dari:
- Komposisi isotop dan massa atom standar dari:
- Data waktu paruh, spin, dan isomer dipilih dari sumber-sumber berikut.
Sumber dan atribusi
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