Isotopen van neodymium
Het chemisch element neodymium (Nd), met een atoommassa van 144,242(3) u, bezit 5 stabiele isotopen: 142Nd, 143Nd, 145Nd, 146Nd en 148Nd, waarvan de eerste het meest abundant is (ongeveer 27%). Daarnaast komen ook 2 radio-isotopen in de natuur voor: 144Nd en 150Nd, met een respectievelijke halfwaardetijd van 2,29 biljard en 6,7 triljoen jaar. De overige 30 radio-isotopen zijn onstabiel en hebben een relatief korte halfwaardetijd (de meeste minder dan een seconde).
De kortstlevende isotoop van neodymium is 161Nd, met een halfwaardetijd van ongeveer 200 milliseconden. De langstlevende is 150Nd, met een halfwaardetijd van 6,7 triljoen jaar.
Overzicht
[bewerken | brontekst bewerken]| Nuclide | Z (p) | N (n) | Isotopische massa (u) | Halveringstijd | Radioactief verval | VP | Kernspin | Isotopische verhouding (molfractie) |
Natuurlijk voorkomen (molfractie) |
|---|---|---|---|---|---|---|---|---|---|
| Excitatie-energie | |||||||||
| 124Nd | 60 | 64 | 123,95223(64) | 500 ms | 0+ | ||||
| 125Nd | 60 | 65 | 124,94888(43) | 600(150) ms | 5/2+ | ||||
| 126Nd | 60 | 66 | 125,94322(43) | 1 s | β+ | 126Pr | 0+ | ||
| 127Nd | 60 | 67 | 126,94050(43) | 1,8(4) s | β+ | 127Pr | 5/2+ | ||
| β+, p (zelden) | 126Ce | ||||||||
| 128Nd | 60 | 68 | 127,93539(21) | 5 s | β+ | 128Pr | 0+ | ||
| β+, p (zelden) | 127Ce | ||||||||
| 129Nd | 60 | 69 | 128,93319(22) | 4,9(2) s | β+ | 129Pr | 5/2+ | ||
| β+, p (zelden) | 128Ce | ||||||||
| 130Nd | 60 | 70 | 129,92851(3) | 21(3) s | β+ | 130Pr | 0+ | ||
| 131Nd | 60 | 71 | 130,92725(3) | 33(3) s | β+ | 131Pr | (5/2+) | ||
| β+, p (zelden) | 130Ce | ||||||||
| 132Nd | 60 | 72 | 131,923321(26) | 1,56(10) min | β+ | 132Pr | 0+ | ||
| 133Nd | 60 | 73 | 132,92235(5) | 70(10) s | β+ | 133Pr | (7/2+) | ||
| 133m1Nd | 127,97(11) keV | ± 70 s | β+ | 133Pr | 1/2+ | ||||
| 133m2Nd | 176,10(10) keV | ± 300 ns | (9/2−) | ||||||
| 134Nd | 60 | 74 | 133,918790(13) | 8,5(15) min | β+ | 134Pr | 0+ | ||
| 134mNd | 2293,1(4) keV | 410(30) µs | 8− | ||||||
| 135Nd | 60 | 75 | 134,918181(21) | 12,4(6) min | β+ | 135Pr | 9/2− | ||
| 135mNd | 65,0(2) keV | 5,5(5) min | β+ | 135Pr | (1/2+) | ||||
| 136Nd | 60 | 76 | 135,914976(13) | 50,65(33) min | β+ | 136Pr | 0+ | ||
| 137Nd | 60 | 77 | 136,914567(12) | 38,5(15) min | β+ | 137Pr | 1/2+ | ||
| 137mNd | 519,43(17) keV | 1,60(15) s | IT | 137Nd | (11/2−) | ||||
| 138Nd | 60 | 78 | 137,911950(13) | 5,04(9) uur | β+ | 138Pr | 0+ | ||
| 138mNd | 3174,9(4) keV | 410(50) ns | (10+) | ||||||
| 139Nd | 60 | 79 | 138,911978(28) | 29,7(5) min | β+ | 139Pr | 3/2+ | ||
| 139m1Nd | 231,15(5) keV | 5,50(20) uur | β+ (88,2%) | 139Pr | 11/2− | ||||
| IT (11,8%) | 139Nd | ||||||||
| 139m2Nd | 2570,9 keV | > 141 ns | |||||||
| 140Nd | 60 | 80 | 139,90955(3) | 3,37(2) dagen | EV | 140Pr | 0+ | ||
| 140mNd | 2221,4(1) keV | 600(50) µs | 7− | ||||||
| 141Nd | 60 | 81 | 140,909610(4) | 2,49(3) uur | β+ | 141Pr | 3/2+ | ||
| 141mNd | 756,51(5) keV | 62,0(8) s | IT (99,95%) | 141Nd | 11/2− | ||||
| β+ (0,05%) | 141Pr | ||||||||
| 142Nd | 60 | 82 | 141,9077233(25) | stabiel | 0+ | 0,272(5) | 0,2680 - 0,2730 | ||
| 143Nd | 60 | 83 | 142,9098143(25) | stabiel | 7/2− | 0,122(2) | 0,1212 - 0,1232 | ||
| 144Nd | 60 | 84 | 143,9100873(25) | 2,29(16) × 1015 jaar | α | 140Ce | 0+ | 0,238(3) | 0,2379 - 0,2397 |
| 145Nd | 60 | 85 | 144,9125736(25) | stabiel | 7/2- | 0,083(1) | 0,0823 - 0,0835 | ||
| 146Nd | 60 | 86 | 145,9131169(25) | stabiel | 0+ | 0,172(3) | 0,1706 - 0,1735 | ||
| 147Nd | 60 | 87 | 146,9161004(25) | 10,98(1) dagen | β− | 147Pm | 5/2− | ||
| 148Nd | 60 | 88 | 147,916893(3) | stabiel | 0+ | 0,057(1) | 0,0566 - 0,0578 | ||
| 149Nd | 60 | 89 | 148,920149(3) | 1,728(1) uur | β− | 148Pm | 5/2− | ||
| 150Nd | 60 | 90 | 149,920891(3) | 6,7(7) × 1018 jaar | β−β− | 150Sm | 0+ | 0,056(2) | 0,0553 - 0,0569 |
| 151Nd | 60 | 91 | 150,923829(3) | 12,44(7) min | β− | 151Pm | 3/2+ | ||
| 152Nd | 60 | 92 | 151,924682(26) | 11,4(2) min | β− | 152Pm | 0+ | ||
| 153Nd | 60 | 93 | 152,927698(29) | 31,6(10) s | β− | 153Pm | 3/2− | ||
| 154Nd | 60 | 94 | 153,92948(12) | 25,9(2) s | β− | 154Pm | 0+ | ||
| 154m1Nd | 480(150) keV | 1,3(5) µs | |||||||
| 154m2Nd | 1349(10) keV | > 1 µs | (5−) | ||||||
| 155Nd | 60 | 95 | 154,93293(16) | 8,9(2) s | β− | 155Pm | 3/2− | ||
| 156Nd | 60 | 96 | 155,93502(22) | 5,49(7) s | β− | 156Pm | 0+ | ||
| 156mNd | 1432(5) keV | 135 ns | 5− | ||||||
| 157Nd | 60 | 97 | 156,93903(21) | 2 s | β− | 157Pm | 5/2− | ||
| 158Nd | 60 | 98 | 157,94160(43) | 700 ms | β− | 158Pm | 0+ | ||
| 159Nd | 60 | 99 | 158,94609(54) | 500 ms | β− | 159Pm | 7/2+ | ||
| 160Nd | 60 | 100 | 159,94909(64) | 300 ms | β− | 160Pm | 0+ | ||
| 161Nd | 60 | 101 | 160,95388(75) | 200 ms | β− | 161Pm | 1/2− | ||
Overzicht van isotopen per element
[bewerken | brontekst bewerken]| 1 | 18 | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | H | 2 | Periodiek systeem | 13 | 14 | 15 | 16 | 17 | He | |||||||||
| 2 | Li | Be | De links verwijzen naar isotopen per element | B | C | N | O | F | Ne | |||||||||
| 3 | Na | Mg | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Al | Si | P | S | Cl | Ar |
| 4 | K | Ca | Sc | Ti | V | Cr | Mn | Fe | Co | Ni | Cu | Zn | Ga | Ge | As | Se | Br | Kr |
| 5 | Rb | Sr | Y | Zr | Nb | Mo | Tc | Ru | Rh | Pd | Ag | Cd | In | Sn | Sb | Te | I | Xe |
| 6 | Cs | Ba | ↓ | Hf | Ta | W | Re | Os | Ir | Pt | Au | Hg | Tl | Pb | Bi | Po | At | Rn |
| 7 | Fr | Ra | ↓↓ | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og |
| Lanthaniden | La | Ce | Pr | Nd | Pm | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | |||
| Actiniden | Ac | Th | Pa | U | Np | Pu | Am | Cm | Bk | Cf | Es | Fm | Md | No | Lr | |||
Bronnen, noten en/of referenties
- (en) R.B. Firestone, S.Y. Frank Chu & C.M. Baglin (1999) - Table of Isotopes (online versie van de cd-rom)
- (en) G. Audi, A.H. Wapstra, C. Thibault, J. Blachot & O. Bersillon (2003) - The NUBASE evaluation of nuclear and decay properties, Nuclear Physics A, 729, pp. 3-128
- (en) J.R. de Laeter, J.K. Böhlke, P. De Bièvre, H. Hidaka, H.S. Peiser, K.J.R. Rosman & P.D.P. Taylor (2003) - Atomic weights of the elements. Review 2000 (IUPAC Technical Report), Pure and Applied Chemistry, 75 (6), pp. 683–800
- (en) M.E. Wieser (2006) - Atomic weights of the elements 2005 (IUPAC Technical Report), Pure and Applied Chemistry, 78 (11), pp. 2051–2066
- (en) David R. Lide (2004) - CRC Handbook of Chemistry and Physics (85th ed.), hoofdstuk 11, CRC Press - ISBN 978-0849304859
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