# Isotopen van praseodymium

Het chemisch element praseodymium (Pr), met een atoommassa van 140,90765(2) u, bezit 1 stabiele isotoop: $^{141}$Pr, die theoretisch gezien in staat om spontane splijting te ondergaan. Het is tevens de enige in de natuur voorkomende isotoop van dit element, waardoor het valt onder de mononuclidische elementen. De 37 radio-isotopen zijn onstabiel en hebben een relatief korte halveringstijd (de meeste minder dan een seconde).
De kortstlevende isotoop van praseodymium is $^{159}$Pr, met een halfwaardetijd van ongeveer 100 milliseconden. De langstlevende is $^{143}$Pr, met een halfwaardetijd van 13,57 dagen.

## Overzicht

| Nuclide | Z (p) | N (n) | Isotopische massa (u) | Halveringstijd | Radioactief verval | VP | Kernspin | Isotopische verhouding (molfractie) |
| Natuurlijk voorkomen (molfractie) |||
| $^{121}$Pr | 59 | 62 | 120,95536(75) | 600(300) ms | p | $^{120}$Ce | (3/2$^−$) | |
| $^{121}$Pr | 59 | 62 | 120,95536(75) | 600(300) ms | β$^+$ (zelden) | $^{121}$Ce | (3/2$^−$) | |
| $^{121}$Pr | 59 | 62 | 120,95536(75) | 600(300) ms | β$^+$, p (zelden) | $^{120}$La | (3/2$^−$) | |
| $^{122}$Pr | 59 | 63 | 121,95181(54) | 500 ms | β$^+$ | $^{122}$Ce | | |
| $^{123}$Pr | 59 | 64 | 122,94596(64) | 800 ms | β$^+$ | $^{123}$Ce | 3/2$^+$ | |
| $^{124}$Pr | 59 | 65 | 123,94296(64) | 1,2(2) s | β$^+$ | $^{124}$Ce | | |
| $^{124}$Pr | 59 | 65 | 123,94296(64) | 1,2(2) s | β$^+$, p (zelden) | $^{123}$La | | |
| $^{125}$Pr | 59 | 66 | 124,93783(43) | 3,3(7) s | β$^+$ | $^{125}$Ce | 3/2$^+$ | |
| $^{125}$Pr | 59 | 66 | 124,93783(43) | 3,3(7) s | β$^+$, p (zelden) | $^{124}$La | 3/2$^+$ | |
| $^{126}$Pr | 59 | 67 | 125,93531(21) | 3,12(18) s | β$^+$ | $^{126}$Ce | (4, 5, 6) | |
| $^{126}$Pr | 59 | 67 | 125,93531(21) | 3,12(18) s | β$^+$, p (zelden) | $^{125}$La | (4, 5, 6) | |
| $^{127}$Pr | 59 | 68 | 126,93083(21) | 4,2(3) s | β$^+$ | $^{127}$Ce | 3/2$^+$ | |
| $^{127m}$Pr | 600(200) keV | 600(200) keV | 600(200) keV | 50 ms | | | 11/2$^−$ | |
| $^{128}$Pr | 59 | 69 | 127,92879(3) | 2,84(9) s | β$^+$ | $^{128}$Ce | (3$^+$) | |
| $^{128}$Pr | 59 | 69 | 127,92879(3) | 2,84(9) s | β$^+$, p (zelden) | $^{127}$La | (3$^+$) | |
| $^{129}$Pr | 59 | 70 | 128,92510(3) | 32(3) s | β$^+$ | $^{129}$Ce | (11/2$^−$) | |
| $^{129m}$Pr | 382,7(5) keV | 382,7(5) keV | 382,7(5) keV | 1 ms | β$^+$ | $^{129}$Ce | (11/2$^−$) | |
| $^{130}$Pr | 59 | 71 | 129,92359(7) | 40,0(4) s | β$^+$ | $^{130}$Ce | (6, 7)$^+$ | |
| $^{130m}$Pr | 100(100) keV | 100(100) keV | 100(100) keV | 10 s | | | 2$^+$ | |
| $^{131}$Pr | 59 | 72 | 130,92026(6) | 1,50(3) min | β$^+$ | $^{131}$Ce | (3/2$^+$) | |
| $^{131m}$Pr | 152,4(2) keV | 152,4(2) keV | 152,4(2) keV | 5,7(2) s | IT (96,4%) | $^{131}$Pr | (11/2$^−$) | |
| $^{131m}$Pr | 152,4(2) keV | 152,4(2) keV | 152,4(2) keV | 5,7(2) s | β$^+$ (3,59%) | $^{131}$Ce | (11/2$^−$) | |
| $^{132}$Pr | 59 | 73 | 131,91926(6) | 1,49(11) min | β$^+$ | $^{132}$Ce | (2$^+$) | |
| $^{132m}$Pr | 0(100) keV | 0(100) keV | 0(100) keV | 20 s | β$^+$ | $^{132}$Ce | (5$^+$) | |
| $^{133}$Pr | 59 | 74 | 132,916331(13) | 6,5(3) min | β$^+$ | $^{133}$Ce | (3/2$^+$) | |
| $^{133m}$Pr | 192,05(14) keV | 192,05(14) keV | 192,05(14) keV | 1,1(2) µs | | | (11/2$^−$) | |
| $^{134}$Pr | 59 | 75 | 133,91571(4) | ± 11 min | β$^+$ | $^{134}$Ce | (5$^−$) | |
| $^{134m}$Pr | 0(100) keV | 0(100) keV | 0(100) keV | 17(2) min | β$^+$ | $^{134}$Ce | 2$^−$ | |
| $^{135}$Pr | 59 | 76 | 134,913112(13) | 24(2) min | β$^+$ | $^{135}$Ce | 3/2$^+$ | |
| $^{135m}$Pr | 358,06(6) keV | 358,06(6) keV | 358,06(6) keV | 105(10) µs | | | (11/2$^−$) | |
| $^{136}$Pr | 59 | 77 | 135,912692(13) | 13,1(1) min | β$^+$ | $^{136}$Ce | 2$^+$ | |
| $^{137}$Pr | 59 | 78 | 136,910705(13) | 1,28(3) uur | β$^+$ | $^{137}$Ce | 5/2$^+$ | |
| $^{137m}$Pr | 561,22(23) keV | 561,22(23) keV | 561,22(23) keV | 2,66(7) µs | | | 11/2$^−$ | |
| $^{138}$Pr | 59 | 79 | 137,910755(15) | 1,45(5) min | β$^+$ | $^{138}$Ce | 1$^+$ | |
| $^{138m}$Pr | 348(23) keV | 348(23) keV | 348(23) keV | 2,12(4) uur | β$^+$ | $^{138}$Ce | 7$^−$ | |
| $^{139}$Pr | 59 | 80 | 138,908938(8) | 4,41(4) uur | β$^+$ | $^{139}$Ce | 5/2$^+$ | |
| $^{140}$Pr | 59 | 81 | 139,909076(7) | 3,39(1) min | β$^+$ | $^{140}$Ce | 1$^+$ | |
| $^{140m1}$Pr | 127,5(3) keV | 127,5(3) keV | 127,5(3) keV | 0,35(2) µs | | | 5$^+$ | |
| $^{140m2}$Pr | 763,3(7) keV | 763,3(7) keV | 763,3(7) keV | 3,05(20) µs | | | 8$^−$ | |
| $^{141}$Pr | 59 | 82 | 140,9076528(26) | stabiel | stabiel | stabiel | 5/2$^+$ | 1,0000 |
| $^{142}$Pr | 59 | 83 | 141,9100448(26) | 19,12(4) uur | β$^−$ (99,98%) | $^{142}$Nd | 2$^−$ | |
| $^{142}$Pr | 59 | 83 | 141,9100448(26) | 19,12(4) uur | EV (0,0164%) | $^{142}$Ce | 2$^−$ | |
| $^{142m}$Pr | 3,694(3) keV | 3,694(3) keV | 3,694(3) keV | 14,6(5) min | IT | $^{142}$Pr | 5$^−$ | |
| $^{143}$Pr | 59 | 84 | 142,9108169(28) | 13,57(2) dagen | β$^−$ | $^{143}$Nd | 7/2$^+$ | |
| $^{144}$Pr | 59 | 85 | 143,913305(4) | 17,28(5) min | β$^−$ | $^{144}$Nd | 0$^−$ | |
| $^{144m}$Pr | 59,03(3) keV | 59,03(3) keV | 59,03(3) keV | 7,2(3) min | IT (99,93%) | $^{144}$Pr | 3$^−$ | |
| $^{144m}$Pr | 59,03(3) keV | 59,03(3) keV | 59,03(3) keV | 7,2(3) min | β$^−$ (0,07%) | $^{144}$Nd | 3$^−$ | |
| $^{145}$Pr | 59 | 86 | 144,914512(8) | 5,984(10) uur | β$^−$ | $^{145}$Nd | 7/2$^+$ | |
| $^{146}$Pr | 59 | 87 | 145,91764(7) | 24,15(18) min | β$^−$ | $^{146}$Nd | 2$^−$ | |
| $^{147}$Pr | 59 | 88 | 146,918996(25) | 13,4(4) min | β$^−$ | $^{147}$Nd | (3/2$^+$) | |
| $^{148}$Pr | 59 | 89 | 147,922135(28) | 2,29(2) min | β$^−$ | $^{148}$Nd | 1$^−$ | |
| $^{148m}$Pr | 50(30) keV | 50(30) keV | 50(30) keV | 2,01(7) min | β$^−$ | $^{148}$Nd | (4) | |
| $^{149}$Pr | 59 | 90 | 148,92372(9) | 2,26(7) min | β$^−$ | $^{149}$Nd | (5/2$^+$) | |
| $^{150}$Pr | 59 | 91 | 149,926673(28) | 6,19(16) s | β$^−$ | $^{150}$Nd | 1$^−$ | |
| $^{151}$Pr | 59 | 92 | 150,928319(25) | 18,90(7) s | β$^−$ | $^{151}$Nd | (3/2$^−$) | |
| $^{152}$Pr | 59 | 93 | 151,93150(13) | 3,63(12) s | β$^−$ | $^{152}$Nd | 4$^+$ | |
| $^{153}$Pr | 59 | 94 | 152,93384(11) | 4,28(11) s | β$^−$ | $^{153}$Nd | 5/2$^−$ | |
| $^{154}$Pr | 59 | 95 | 153,93752(16) | 2,3(1) s | β$^−$ | $^{154}$Nd | (3$^+$, 2$^+$) | |
| $^{155}$Pr | 59 | 96 | 154,94012(32) | 1 s | β$^−$ | $^{155}$Nd | 5/2$^−$ | |
| $^{156}$Pr | 59 | 97 | 155,94427(43) | 500 ms | β$^−$ | $^{156}$Nd | | |
| $^{157}$Pr | 59 | 98 | 156,94743(43) | 300 ms | β$^−$ | $^{157}$Nd | 5/2$^−$ | |
| $^{158}$Pr | 59 | 99 | 157,95198(64) | 200 ms | β$^−$ | $^{158}$Nd | | |
| $^{159}$Pr | 59 | 100 | 158,95550(75) | 100 ms | β$^−$ | $^{159}$Nd | 5/2$^−$ | |

## 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
$^{121}$Pr · $^{122}$Pr · $^{123}$Pr · $^{124}$Pr · $^{125}$Pr · $^{126}$Pr · $^{127}$Pr · $^{127m}$Pr · $^{128}$Pr · $^{129}$Pr · $^{129m}$Pr · $^{130}$Pr · $^{130m}$Pr · $^{131}$Pr · $^{131m}$Pr · $^{132}$Pr · $^{132m}$Pr · $^{133}$Pr · $^{133m}$Pr · $^{134}$Pr · $^{134m}$Pr · $^{135}$Pr · $^{135m}$Pr · $^{136}$Pr · $^{137}$Pr · $^{137m}$Pr · $^{138}$Pr · $^{138m}$Pr · $^{139}$Pr · $^{140}$Pr · $^{140m1}$Pr · $^{140m2}$Pr · $^{141}$Pr · $^{142}$Pr · $^{142m}$Pr · $^{143}$Pr · $^{144}$Pr · $^{144m}$Pr · $^{145}$Pr · $^{146}$Pr · $^{147}$Pr · $^{148}$Pr · $^{148m}$Pr · $^{149}$Pr · $^{150}$Pr · $^{151}$Pr · $^{152}$Pr · $^{153}$Pr · $^{154}$Pr · $^{155}$Pr · $^{156}$Pr · $^{157}$Pr · $^{158}$Pr · $^{159}$Pr · $^{160}$Pr