# Isotopen van neodymium

Het chemisch element neodymium (Nd), met een atoommassa van 144,242(3) u, bezit 5 stabiele isotopen: $^{142}$Nd, $^{143}$Nd, $^{145}$Nd, $^{146}$Nd en $^{148}$Nd, waarvan de eerste het meest abundant is (ongeveer 27%). Daarnaast komen ook 2 radio-isotopen in de natuur voor: $^{144}$Nd en $^{150}$Nd, 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 $^{161}$Nd, met een halfwaardetijd van ongeveer 200 milliseconden. De langstlevende is $^{150}$Nd, met een halfwaardetijd van 6,7 triljoen jaar.

## Overzicht

| Nuclide | Z (p) | N (n) | Isotopische massa (u) | Halveringstijd | Radioactief verval | VP | Kernspin | Isotopische verhouding (molfractie) | Natuurlijk voorkomen (molfractie) |
| Natuurlijk voorkomen (molfractie) |||
| $^{124}$Nd | 60 | 64 | 123,95223(64) | 500 ms | | | 0$^+$ | | |
| $^{125}$Nd | 60 | 65 | 124,94888(43) | 600(150) ms | | | 5/2$^+$ | | |
| $^{126}$Nd | 60 | 66 | 125,94322(43) | 1 s | β$^+$ | $^{126}$Pr | 0$^+$ | | |
| $^{127}$Nd | 60 | 67 | 126,94050(43) | 1,8(4) s | β$^+$ | $^{127}$Pr | 5/2$^+$ | | |
| $^{127}$Nd | 60 | 67 | 126,94050(43) | 1,8(4) s | β$^+$, p (zelden) | $^{126}$Ce | 5/2$^+$ | | |
| $^{128}$Nd | 60 | 68 | 127,93539(21) | 5 s | β$^+$ | $^{128}$Pr | 0$^+$ | | |
| $^{128}$Nd | 60 | 68 | 127,93539(21) | 5 s | β$^+$, p (zelden) | $^{127}$Ce | 0$^+$ | | |
| $^{129}$Nd | 60 | 69 | 128,93319(22) | 4,9(2) s | β$^+$ | $^{129}$Pr | 5/2$^+$ | | |
| $^{129}$Nd | 60 | 69 | 128,93319(22) | 4,9(2) s | β$^+$, p (zelden) | $^{128}$Ce | 5/2$^+$ | | |
| $^{130}$Nd | 60 | 70 | 129,92851(3) | 21(3) s | β$^+$ | $^{130}$Pr | 0$^+$ | | |
| $^{131}$Nd | 60 | 71 | 130,92725(3) | 33(3) s | β$^+$ | $^{131}$Pr | (5/2$^+$) | | |
| $^{131}$Nd | 60 | 71 | 130,92725(3) | 33(3) s | β$^+$, p (zelden) | $^{130}$Ce | (5/2$^+$) | | |
| $^{132}$Nd | 60 | 72 | 131,923321(26) | 1,56(10) min | β$^+$ | $^{132}$Pr | 0$^+$ | | |
| $^{133}$Nd | 60 | 73 | 132,92235(5) | 70(10) s | β$^+$ | $^{133}$Pr | (7/2$^+$) | | |
| $^{133m1}$Nd | 127,97(11) keV | 127,97(11) keV | 127,97(11) keV | ± 70 s | β$^+$ | $^{133}$Pr | 1/2$^+$ | | |
| $^{133m2}$Nd | 176,10(10) keV | 176,10(10) keV | 176,10(10) keV | ± 300 ns | | | (9/2$^−$) | | |
| $^{134}$Nd | 60 | 74 | 133,918790(13) | 8,5(15) min | β$^+$ | $^{134}$Pr | 0$^+$ | | |
| $^{134m}$Nd | 2293,1(4) keV | 2293,1(4) keV | 2293,1(4) keV | 410(30) µs | | | 8$^−$ | | |
| $^{135}$Nd | 60 | 75 | 134,918181(21) | 12,4(6) min | β$^+$ | $^{135}$Pr | 9/2$^−$ | | |
| $^{135m}$Nd | 65,0(2) keV | 65,0(2) keV | 65,0(2) keV | 5,5(5) min | β$^+$ | $^{135}$Pr | (1/2$^+$) | | |
| $^{136}$Nd | 60 | 76 | 135,914976(13) | 50,65(33) min | β$^+$ | $^{136}$Pr | 0$^+$ | | |
| $^{137}$Nd | 60 | 77 | 136,914567(12) | 38,5(15) min | β$^+$ | $^{137}$Pr | 1/2$^+$ | | |
| $^{137m}$Nd | 519,43(17) keV | 519,43(17) keV | 519,43(17) keV | 1,60(15) s | IT | $^{137}$Nd | (11/2$^−$) | | |
| $^{138}$Nd | 60 | 78 | 137,911950(13) | 5,04(9) uur | β$^+$ | $^{138}$Pr | 0$^+$ | | |
| $^{138m}$Nd | 3174,9(4) keV | 3174,9(4) keV | 3174,9(4) keV | 410(50) ns | | | (10$^+$) | | |
| $^{139}$Nd | 60 | 79 | 138,911978(28) | 29,7(5) min | β$^+$ | $^{139}$Pr | 3/2$^+$ | | |
| $^{139m1}$Nd | 231,15(5) keV | 231,15(5) keV | 231,15(5) keV | 5,50(20) uur | β$^+$ (88,2%) | $^{139}$Pr | 11/2$^−$ | | |
| $^{139m1}$Nd | 231,15(5) keV | 231,15(5) keV | 231,15(5) keV | 5,50(20) uur | IT (11,8%) | $^{139}$Nd | 11/2$^−$ | | |
| $^{139m2}$Nd | 2570,9 keV | 2570,9 keV | 2570,9 keV | > 141 ns | | | | | |
| $^{140}$Nd | 60 | 80 | 139,90955(3) | 3,37(2) dagen | EV | $^{140}$Pr | 0$^+$ | | |
| $^{140m}$Nd | 2221,4(1) keV | 2221,4(1) keV | 2221,4(1) keV | 600(50) µs | | | 7$^−$ | | |
| $^{141}$Nd | 60 | 81 | 140,909610(4) | 2,49(3) uur | β$^+$ | $^{141}$Pr | 3/2$^+$ | | |
| $^{141m}$Nd | 756,51(5) keV | 756,51(5) keV | 756,51(5) keV | 62,0(8) s | IT (99,95%) | $^{141}$Nd | 11/2$^−$ | | |
| $^{141m}$Nd | 756,51(5) keV | 756,51(5) keV | 756,51(5) keV | 62,0(8) s | β$^+$ (0,05%) | $^{141}$Pr | 11/2$^−$ | | |
| $^{142}$Nd | 60 | 82 | 141,9077233(25) | stabiel | stabiel | stabiel | 0$^+$ | 0,272(5) | 0,2680 - 0,2730 |
| $^{143}$Nd | 60 | 83 | 142,9098143(25) | stabiel | stabiel | stabiel | 7/2$^−$ | 0,122(2) | 0,1212 - 0,1232 |
| $^{144}$Nd | 60 | 84 | 143,9100873(25) | 2,29(16) × 10$^{15}$ jaar | α | $^{140}$Ce | 0$^+$ | 0,238(3) | 0,2379 - 0,2397 |
| $^{145}$Nd | 60 | 85 | 144,9125736(25) | stabiel | stabiel | stabiel | 7/2- | 0,083(1) | 0,0823 - 0,0835 |
| $^{146}$Nd | 60 | 86 | 145,9131169(25) | stabiel | stabiel | stabiel | 0$^+$ | 0,172(3) | 0,1706 - 0,1735 |
| $^{147}$Nd | 60 | 87 | 146,9161004(25) | 10,98(1) dagen | β$^−$ | $^{147}$Pm | 5/2$^−$ | | |
| $^{148}$Nd | 60 | 88 | 147,916893(3) | stabiel | stabiel | stabiel | 0$^+$ | 0,057(1) | 0,0566 - 0,0578 |
| $^{149}$Nd | 60 | 89 | 148,920149(3) | 1,728(1) uur | β$^−$ | $^{148}$Pm | 5/2$^−$ | | |
| $^{150}$Nd | 60 | 90 | 149,920891(3) | 6,7(7) × 10$^{18}$ jaar | β$^−$β$^−$ | $^{150}$Sm | 0$^+$ | 0,056(2) | 0,0553 - 0,0569 |
| $^{151}$Nd | 60 | 91 | 150,923829(3) | 12,44(7) min | β$^−$ | $^{151}$Pm | 3/2$^+$ | | |
| $^{152}$Nd | 60 | 92 | 151,924682(26) | 11,4(2) min | β$^−$ | $^{152}$Pm | 0$^+$ | | |
| $^{153}$Nd | 60 | 93 | 152,927698(29) | 31,6(10) s | β$^−$ | $^{153}$Pm | 3/2$^−$ | | |
| $^{154}$Nd | 60 | 94 | 153,92948(12) | 25,9(2) s | β$^−$ | $^{154}$Pm | 0$^+$ | | |
| $^{154m1}$Nd | 480(150) keV | 480(150) keV | 480(150) keV | 1,3(5) µs | | | | | |
| $^{154m2}$Nd | 1349(10) keV | 1349(10) keV | 1349(10) keV | > 1 µs | | | (5$^−$) | | |
| $^{155}$Nd | 60 | 95 | 154,93293(16) | 8,9(2) s | β$^−$ | $^{155}$Pm | 3/2$^−$ | | |
| $^{156}$Nd | 60 | 96 | 155,93502(22) | 5,49(7) s | β$^−$ | $^{156}$Pm | 0$^+$ | | |
| $^{156m}$Nd | 1432(5) keV | 1432(5) keV | 1432(5) keV | 135 ns | | | 5$^−$ | | |
| $^{157}$Nd | 60 | 97 | 156,93903(21) | 2 s | β$^−$ | $^{157}$Pm | 5/2$^−$ | | |
| $^{158}$Nd | 60 | 98 | 157,94160(43) | 700 ms | β$^−$ | $^{158}$Pm | 0$^+$ | | |
| $^{159}$Nd | 60 | 99 | 158,94609(54) | 500 ms | β$^−$ | $^{159}$Pm | 7/2$^+$ | | |
| $^{160}$Nd | 60 | 100 | 159,94909(64) | 300 ms | β$^−$ | $^{160}$Pm | 0$^+$ | | |
| $^{161}$Nd | 60 | 101 | 160,95388(75) | 200 ms | β$^−$ | $^{161}$Pm | 1/2$^−$ | | |

## Overzicht van isotopen per element

* (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
$^{124}$Nd · $^{125}$Nd · $^{126}$Nd · $^{127}$Nd · $^{128}$Nd · $^{129}$Nd · $^{130}$Nd · $^{131}$Nd · $^{132}$Nd · $^{133}$Nd · $^{133m1}$Nd · $^{133m2}$Nd · $^{134}$Nd · $^{134m}$Nd · $^{135}$Nd · $^{135m}$Nd · $^{136}$Nd · $^{137}$Nd · $^{137m}$Nd · $^{138}$Nd · $^{138m}$Nd · $^{139}$Nd · $^{139m1}$Nd · $^{139m2}$Nd · $^{140}$Nd · $^{140m}$Nd · $^{141}$Nd · $^{141m}$Nd · $^{142}$Nd · $^{143}$Nd · $^{144}$Nd · $^{145}$Nd · $^{146}$Nd · $^{147}$Nd · $^{148}$Nd · $^{149}$Nd · $^{150}$Nd · $^{151}$Nd · $^{152}$Nd · $^{153}$Nd · $^{154}$Nd · $^{154m1}$Nd · $^{154m2}$Nd · $^{155}$Nd · $^{156}$Nd · $^{156m}$Nd · $^{157}$Nd · $^{158}$Nd · $^{159}$Nd · $^{160}$Nd · $^{161}$Nd · $^{162}$Nd