# Isotopen van ytterbium

Het chemisch element ytterbium (Yb), met een atoommassa van 173,04(3) u, bezit 7 stabiele isotopen: $^{168}$Yb, $^{170}$Yb, $^{171}$Yb, $^{172}$Yb, $^{173}$Yb, $^{174}$Yb en $^{176}$Yb, waarvan de voorlaatste het meest abundant is (ongeveer 32%). De 26 radio-isotopen zijn onstabiel en hebben een relatief korte halfwaardetijd (de meeste minder dan een seconde). Alle stabiele isotopen worden ervan verdacht via α-verval te vervallen tot isotopen van erbium, maar dit verval is nog nooit waargenomen. Bovendien is de halfwaardetijd van dit verval steeds miljoenen tot miljarden malen groter dan de leeftijd van het universum, waardoor de isotopen als stabiel mogen beschouwd worden.
De kortstlevende isotoop van ytterbium is $^{148}$Yb, met een halfwaardetijd van ongeveer 250 milliseconden. De langstlevende is $^{169}$Yb, met een halfwaardetijd van 32,026 dagen.

## Overzicht

| Nuclide | Z (p) | N (n) | Isotopische massa (u) | Halveringstijd | Radioactief verval | VP | Kernspin | Isotopische verhouding (molfractie) |
| Natuurlijk voorkomen (molfractie) |||
| $^{148}$Yb | 70 | 78 | 147,96742(64) | 250 ms | β$^+$ | $^{148}$Tm | 0$^+$ | |
| $^{149}$Yb | 70 | 79 | 148,96404(54) | 0,7(2) s | β$^+$ | $^{149}$Tm | (1/2$^+$, 3/2$^+$) | |
| $^{150}$Yb | 70 | 80 | 149,95842(43) | 700 ms | β$^+$ | $^{150}$Tm | 0$^+$ | |
| $^{151}$Yb | 70 | 81 | 150,95540(32) | 1,6(5) s | β$^+$ | $^{151}$Tm | (1/2$^+$) | |
| $^{151}$Yb | 70 | 81 | 150,95540(32) | 1,6(5) s | β$^+$, p (zelden) | $^{150}$Er | (1/2$^+$) | |
| $^{151m1}$Yb | 750(100) keV | 750(100) keV | 750(100) keV | 1,6(5) s | β$^+$ | $^{151}$Tm | (11/2$^−$) | |
| $^{151m1}$Yb | 750(100) keV | 750(100) keV | 750(100) keV | 1,6(5) s | β$^+$, p (zelden) | $^{150}$Er | (11/2$^−$) | |
| $^{151m2}$Yb | 1790(500) keV | 1790(500) keV | 1790(500) keV | 2,6(7) µs | | | 19/2$^−$ | |
| $^{151m3}$Yb | 2450(500) keV | 2450(500) keV | 2450(500) keV | 20(1) µs | | | 27/2$^−$ | |
| $^{152}$Yb | 70 | 82 | 151,95029(22) | 3,04(6) s | β$^+$ | $^{152}$Tm | 0$^+$ | |
| $^{152}$Yb | 70 | 82 | 151,95029(22) | 3,04(6) s | β$^+$, p (zelden) | $^{151}$Er | 0$^+$ | |
| $^{153}$Yb | 70 | 83 | 152,94948(21) | 4,2(2) s | α (50%) | $^{149}$Er | 7/2$^−$ | |
| $^{153}$Yb | 70 | 83 | 152,94948(21) | 4,2(2) s | β$^+$ (50%) | $^{153}$Tm | 7/2$^−$ | |
| $^{153}$Yb | 70 | 83 | 152,94948(21) | 4,2(2) s | β$^+$, p (0,008%) | $^{152}$Er | 7/2$^−$ | |
| $^{153m}$Yb | 2700(100) keV | 2700(100) keV | 2700(100) keV | 15(1) µs | | | (27/2$^−$) | |
| $^{154}$Yb | 70 | 84 | 153,946394(19) | 0,409(2) s | α (92,8%) | $^{150}$Er | 0$^+$ | |
| $^{154}$Yb | 70 | 84 | 153,946394(19) | 0,409(2) s | β$^+$ (7,119%) | $^{154}$Tm | 0$^+$ | |
| $^{155}$Yb | 70 | 85 | 154,945782(18) | 1,793(19) s | α (89%) | $^{151}$Er | (7/2$^−$) | |
| $^{155}$Yb | 70 | 85 | 154,945782(18) | 1,793(19) s | β$^+$ (11%) | $^{155}$Tm | (7/2$^−$) | |
| $^{156}$Yb | 70 | 86 | 155,942818(12) | 26,1(7) s | β$^+$ (90%) | $^{156}$Tm | 0$^+$ | |
| $^{156}$Yb | 70 | 86 | 155,942818(12) | 26,1(7) s | α (10%) | $^{152}$Er | 0$^+$ | |
| $^{157}$Yb | 70 | 87 | 156,942628(11) | 38,6(10) s | β$^+$ (99,5%) | $^{157}$Tm | 7/2$^−$ | |
| $^{157}$Yb | 70 | 87 | 156,942628(11) | 38,6(10) s | α (0,5%) | $^{153}$Er | 7/2$^−$ | |
| $^{158}$Yb | 70 | 88 | 157,939866(9) | 1,49(13) min | β$^+$ (99,99%) | $^{158}$Tm | 0$^+$ | |
| $^{158}$Yb | 70 | 88 | 157,939866(9) | 1,49(13) min | α (0,0021%) | $^{154}$Er | 0$^+$ | |
| $^{159}$Yb | 70 | 89 | 158,94005(2) | 1,67(9) min | β$^+$ | $^{159}$Tm | 5/2$^−$ | |
| $^{160}$Yb | 70 | 90 | 159,937552(18) | 4,8(2) min | β$^+$ | $^{160}$Tm | 0$^+$ | |
| $^{161}$Yb | 70 | 91 | 160,937902(17) | 4,2(2) min | β$^+$ | $^{161}$Tm | 3/2$^−$ | |
| $^{162}$Yb | 70 | 92 | 161,935768(17) | 18,87(19) min | β$^+$ | $^{162}$Tm | 0$^+$ | |
| $^{163}$Yb | 70 | 93 | 162,936334(17) | 11,05(25) min | β$^+$ | $^{163}$Tm | 3/2$^−$ | |
| $^{164}$Yb | 70 | 94 | 163,934489(17) | 75,8(17) min | EV | $^{164}$Tm | 0$^+$ | |
| $^{165}$Yb | 70 | 95 | 164,93528(3) | 9,9(3) min | β$^+$ | $^{165}$Tm | 5/2$^−$ | |
| $^{166}$Yb | 70 | 96 | 165,933882(9) | 56,7(1) uur | EV | $^{166}$Tm | 0$^+$ | |
| $^{167}$Yb | 70 | 97 | 166,934950(5) | 17,5(2) min | β$^+$ | $^{167}$Tm | 5/2$^−$ | |
| $^{168}$Yb | 70 | 98 | 167,933897(5) | stabiel | stabiel | stabiel | 0$^+$ | 0,0013(1) |
| $^{169}$Yb | 70 | 99 | 168,935190(5) | 32,026(5) dagen | EV | $^{169}$Tm | 7/2$^+$ | |
| $^{169m}$Yb | 24,199(3) keV | 24,199(3) keV | 24,199(3) keV | 46(2) s | IT | $^{169}$Yb | 1/2$^−$ | |
| $^{170}$Yb | 70 | 100 | 169,9347618(26) | stabiel | stabiel | stabiel | 0$^+$ | 0,0304(15) |
| $^{170m}$Yb | 1258,46(14) keV | 1258,46(14) keV | 1258,46(14) keV | 370(15) ns | | | 4$^−$ | |
| $^{171}$Yb | 70 | 101 | 170,9363258(26) | stabiel | stabiel | stabiel | 1/2- | 0,1428(57) |
| $^{171m1}$Yb | 95,282(2) keV | 95,282(2) keV | 95,282(2) keV | 5,25(24) ms | IT | $^{171}$Yb | 7/2$^+$ | |
| $^{171m2}$Yb | 122,416(2) keV | 122,416(2) keV | 122,416(2) keV | 265(20) ns | | | 5/2$^−$ | |
| $^{172}$Yb | 70 | 102 | 171,9363815(26) | stabiel | stabiel | stabiel | 0$^+$ | 0,2183(67) |
| $^{173}$Yb | 70 | 103 | 172,9382108(26) | stabiel | stabiel | stabiel | 5/2- | 0,1613(27) |
| $^{173m}$Yb | 398,9(5) keV | 398,9(5) keV | 398,9(5) keV | 2,9(1) µs | | | 1/2$^−$ | |
| $^{174}$Yb | 70 | 104 | 173,9388621(26) | stabiel | stabiel | stabiel | 0$^+$ | 0,3183(92) |
| $^{175}$Yb | 70 | 105 | 174,9412765(26) | 4,185(1) dagen | β$^−$ | $^{175}$Lu | 7/2$^−$ | |
| $^{175m}$Yb | 514,865(4) keV | 514,865(4) keV | 514,865(4) keV | 68,2(3) ms | | | 1/2$^−$ | |
| $^{176}$Yb | 70 | 106 | 175,9425717(28) | stabiel | stabiel | stabiel | 0$^+$ | 0,1276(41) |
| $^{176m}$Yb | 1050,0(3) keV | 1050,0(3) keV | 1050,0(3) keV | 11,4(3) s | | | 8$^−$ | |
| $^{177}$Yb | 70 | 107 | 176,9452608(28) | 1,911(3) uur | β$^−$ | $^{177}$Lu | (9/2$^+$) | |
| $^{177m}$Yb | 331,5(3) keV | 331,5(3) keV | 331,5(3) keV | 6,41(2) s | IT | $^{177}$Yb | (1/2$^−$) | |
| $^{178}$Yb | 70 | 108 | 177,946647(11) | 74(3) min | β$^−$ | $^{178}$Lu | 0$^+$ | |
| $^{179}$Yb | 70 | 109 | 178,95017(32) | 8,0(4) min | β$^−$ | $^{179}$Lu | (1/2$^−$) | |
| $^{180}$Yb | 70 | 110 | 179,95233(43) | 2,4(5) min | β$^−$ | $^{180}$Lu | 0$^+$ | |
| $^{181}$Yb | 70 | 111 | 180,95615(43) | 1 min | β$^−$ | $^{181}$Lu | 3/2$^−$ | |

## 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
$^{148}$Yb · $^{149}$Yb · $^{150}$Yb · $^{151}$Yb · $^{151m1}$Yb · $^{151m2}$Yb · $^{151m3}$Yb · $^{152}$Yb · $^{153}$Yb · $^{153m}$Yb · $^{154}$Yb · $^{155}$Yb · $^{156}$Yb · $^{157}$Yb · $^{158}$Yb · $^{159}$Yb · $^{160}$Yb · $^{161}$Yb · $^{162}$Yb · $^{163}$Yb · $^{164}$Yb · $^{165}$Yb · $^{166}$Yb · $^{167}$Yb · $^{168}$Yb · $^{169}$Yb · $^{169m}$Yb · $^{170}$Yb · $^{170m}$Yb · $^{171}$Yb · $^{171m1}$Yb · $^{171m2}$Yb · $^{172}$Yb · $^{173}$Yb · $^{173m}$Yb · $^{174}$Yb · $^{175}$Yb · $^{175m}$Yb · $^{176}$Yb · $^{176m}$Yb · $^{177}$Yb · $^{177m}$Yb · $^{178}$Yb · $^{179}$Yb · $^{180}$Yb · $^{181}$Yb · $^{182}$Yb · $^{183}$Yb · $^{184}$Yb · $^{185}$Yb