# Isotopen van iridium

Het chemisch element iridium (Ir), met een atoommassa van 192,217(3) u, bezit 2 stabiele isotopen: $^{191}$Ir en $^{193}$Ir, waarvan de laatste het meest voorkomt (ongeveer 62,7%). De 33 radio-isotopen zijn onstabiel en hebben een relatief korte halfwaardetijd (de meeste minder dan een seconde).
De kortstlevende isotoop van iridium is $^{162}$Ir, met een halfwaardetijd van ongeveer 1,87 milliseconden. De langstlevende is $^{192}$Ir, met een halfwaardetijd van 73,83 dagen. Iridium-192 is een sterke gammastraler en wordt bij onder andere radiotherapie ingezet.

## Overzicht

| Nuclide | Z (p) | N (n) | Isotopische massa (u) | Halveringstijd | Radioactief verval | VP | Kernspin | Isotopische verhouding (molfractie) |
| Natuurlijk voorkomen (molfractie) |||
| $^{164}$Ir | 77 | 87 | 163,99220(44) | 1 ms | | | 2$^−$ | |
| $^{164m}$Ir | 270(110) keV | 270(110) keV | 270(110) keV | 94(27) µs | | | 9$^+$ | |
| $^{165}$Ir | 77 | 88 | 164,98752(23) | < 1 µs | p | $^{164}$Os | 1/2$^+$ | |
| $^{165}$Ir | 77 | 88 | 164,98752(23) | < 1 µs | α (zelden) | $^{161}$Re | 1/2$^+$ | |
| $^{165m}$Ir | 180(50) keV | 180(50) keV | 180(50) keV | 300(60) µs | p (87%) | $^{164}$Os | 11/2$^−$ | |
| $^{165m}$Ir | 180(50) keV | 180(50) keV | 180(50) keV | 300(60) µs | α (13%) | $^{161}$Re | 11/2$^−$ | |
| $^{166}$Ir | 77 | 89 | 165,98582(22) | 10,5(22) ms | α (93%) | $^{162}$Re | (2$^−$) | |
| $^{166}$Ir | 77 | 89 | 165,98582(22) | 10,5(22) ms | p (7%) | $^{165}$Os | (2$^−$) | |
| $^{166m}$Ir | 172(6) keV | 172(6) keV | 172(6) keV | 15,1(9) ms | α (98,2%) | $^{162}$Re | (9$^+$) | |
| $^{166m}$Ir | 172(6) keV | 172(6) keV | 172(6) keV | 15,1(9) ms | p (1,8%) | $^{165}$Os | (9$^+$) | |
| $^{167}$Ir | 77 | 90 | 166,981665(20) | 35,2(20) ms | α (48%) | $^{163}$Re | 1/2$^+$ | |
| $^{167}$Ir | 77 | 90 | 166,981665(20) | 35,2(20) ms | p (32%) | $^{166}$Os | 1/2$^+$ | |
| $^{167}$Ir | 77 | 90 | 166,981665(20) | 35,2(20) ms | β$^+$ (20%) | $^{167}$Os | 1/2$^+$ | |
| $^{167m}$Ir | 175,3(22) keV | 175,3(22) keV | 175,3(22) keV | 30,0(6) ms | α (80%) | $^{163}$Re | 11/2$^−$ | |
| $^{167m}$Ir | 175,3(22) keV | 175,3(22) keV | 175,3(22) keV | 30,0(6) ms | β$^+$ (20%) | $^{167}$Os | 11/2$^−$ | |
| $^{167m}$Ir | 175,3(22) keV | 175,3(22) keV | 175,3(22) keV | 30,0(6) ms | p (0,4%) | $^{166}$Os | 11/2$^−$ | |
| $^{168}$Ir | 77 | 91 | 167,97988(16) | 161(21) ms | α | $^{164}$Re | | |
| $^{168}$Ir | 77 | 91 | 167,97988(16) | 161(21) ms | β$^+$ (zelden) | $^{168}$Os | | |
| $^{168m}$Ir | 50(100) keV | 50(100) keV | 50(100) keV | 125(40) ms | α | $^{164}$Re | | |
| $^{169}$Ir | 77 | 92 | 168,976295(28) | 780(360) ms | α | $^{165}$Re | 1/2$^+$ | |
| $^{169}$Ir | 77 | 92 | 168,976295(28) | 780(360) ms | β$^+$ (zelden) | $^{169}$Os | 1/2$^+$ | |
| $^{169m}$Ir | 154(24) keV | 154(24) keV | 154(24) keV | 308(22) ms | α (72%) | $^{165}$Re | 11/2$^−$ | |
| $^{169m}$Ir | 154(24) keV | 154(24) keV | 154(24) keV | 308(22) ms | β$^+$ (28%) | $^{169}$Os | 11/2$^−$ | |
| $^{170}$Ir | 77 | 93 | 169,97497(11) | 910(150) ms | β$^+$ (64%) | $^{170}$Os | | |
| $^{170}$Ir | 77 | 93 | 169,97497(11) | 910(150) ms | α (36%) | $^{166}$Re | | |
| $^{170m}$Ir | 270(70) keV | 270(70) keV | 270(70) keV | 440(60) ms | | | | |
| $^{171}$Ir | 77 | 94 | 170,97163(4) | 3,6(10) s | α (58%) | $^{167}$Re | 1/2$^+$ | |
| $^{171}$Ir | 77 | 94 | 170,97163(4) | 3,6(10) s | β$^+$ (42%) | $^{171}$Os | 1/2$^+$ | |
| $^{171m}$Ir | 180(30) keV | 180(30) keV | 180(30) keV | 1,40(10) s | | | (11/2$^−$) | |
| $^{172}$Ir | 77 | 95 | 171,97046(11) | 4,4(3) s | β$^+$ (98%) | $^{172}$Os | (3$^+$) | |
| $^{172}$Ir | 77 | 95 | 171,97046(11) | 4,4(3) s | α (2%) | $^{168}$Re | (3$^+$) | |
| $^{172m}$Ir | 280(100) keV | 280(100) keV | 280(100) keV | 2,0(1) s | β$^+$ (77%) | $^{172}$Os | (7$^+$) | |
| $^{172m}$Ir | 280(100) keV | 280(100) keV | 280(100) keV | 2,0(1) s | α (23%) | $^{168}$Re | (7$^+$) | |
| $^{173}$Ir | 77 | 96 | 172,967502(15) | 9,0(8) s | β$^+$ (93%) | $^{173}$Os | (3/2$^+$, 5/2$^+$) | |
| $^{173}$Ir | 77 | 96 | 172,967502(15) | 9,0(8) s | α (7%) | $^{169}$Re | (3/2$^+$, 5/2$^+$) | |
| $^{173m}$Ir | 253(27) keV | 253(27) keV | 253(27) keV | 2,20(5) s | β$^+$ (88%) | $^{173}$Os | (11/2$^−$) | |
| $^{173m}$Ir | 253(27) keV | 253(27) keV | 253(27) keV | 2,20(5) s | α (12%) | $^{169}$Re | (11/2$^−$) | |
| $^{174}$Ir | 77 | 97 | 173,966861(30) | 7,9(6) s | β$^+$ (99,5%) | $^{174}$Os | (3$^+$) | |
| $^{174}$Ir | 77 | 97 | 173,966861(30) | 7,9(6) s | α (0,5%) | $^{170}$Re | (3$^+$) | |
| $^{174m}$Ir | 193(11) keV | 193(11) keV | 193(11) keV | 4,9(3) s | β$^+$ (99,53%) | $^{174}$Os | (7$^+$) | |
| $^{174m}$Ir | 193(11) keV | 193(11) keV | 193(11) keV | 4,9(3) s | α (0,47%) | $^{170}$Re | (7$^+$) | |
| $^{175}$Ir | 77 | 98 | 174,964113(21) | 9(2) s | β$^+$ (99,15%) | $^{175}$Os | (5/2$^−$) | |
| $^{175}$Ir | 77 | 98 | 174,964113(21) | 9(2) s | α (0,85%) | $^{171}$Re | (5/2$^−$) | |
| $^{176}$Ir | 77 | 99 | 175,963649(22) | 8,3(6) s | β$^+$ (97,9%) | $^{176}$Os | | |
| $^{176}$Ir | 77 | 99 | 175,963649(22) | 8,3(6) s | α (2,1%) | $^{172}$Re | | |
| $^{177}$Ir | 77 | 100 | 176,961302(21) | 30(2) s | β$^+$ (99,94%) | $^{177}$Os | 5/2$^−$ | |
| $^{177}$Ir | 77 | 100 | 176,961302(21) | 30(2) s | α (0,06%) | $^{173}$Re | 5/2$^−$ | |
| $^{178}$Ir | 77 | 101 | 177,961082(21) | 12(2) s | β$^+$ | $^{178}$Os | | |
| $^{179}$Ir | 77 | 102 | 178,959122(12) | 79(1) s | β$^+$ | $^{179}$Os | (5/2)$^−$ | |
| $^{180}$Ir | 77 | 103 | 179,959229(23) | 1,5(1) min | β$^+$ | $^{180}$Os | (4, 5)$^+$ | |
| $^{181}$Ir | 77 | 104 | 180,957625(28) | 4,90(15) min | β$^+$ | $^{181}$Os | 5/2$^−$ | |
| $^{182}$Ir | 77 | 105 | 181,958076(23) | 15(1) min | β$^+$ | $^{182}$Os | (3$^+$) | |
| $^{183}$Ir | 77 | 106 | 182,956846(27) | 57(4) min | β$^+$ ( 99,95%) | $^{183}$Os | 5/2$^−$ | |
| $^{183}$Ir | 77 | 106 | 182,956846(27) | 57(4) min | α (0,05%) | $^{179}$Re | 5/2$^−$ | |
| $^{184}$Ir | 77 | 107 | 183,95748(3) | 3,09(3) uur | β$^+$ | $^{184}$Os | 5$^−$ | |
| $^{184m1}$Ir | 225,65(11) keV | 225,65(11) keV | 225,65(11) keV | 470(30) µs | | | 3$^+$ | |
| $^{184m2}$Ir | 328,40(24) keV | 328,40(24) keV | 328,40(24) keV | 350(90) ns | | | 7$^+$ | |
| $^{185}$Ir | 77 | 108 | 184,95670(3) | 14,4(1) uur | β$^+$ | $^{185}$Os | 5/2$^−$ | |
| $^{186}$Ir | 77 | 109 | 185,957946(18) | 16,64(3) uur | β$^+$ | $^{186}$Os | 5$^+$ | |
| $^{186m}$Ir | 0,8(4) keV | 0,8(4) keV | 0,8(4) keV | 1,92(5) uur | β$^+$ | $^{186}$Os | 2$^−$ | |
| $^{186m}$Ir | 0,8(4) keV | 0,8(4) keV | 0,8(4) keV | 1,92(5) uur | IT (zelden) | $^{186}$Ir | 2$^−$ | |
| $^{187}$Ir | 77 | 110 | 186,957363(7) | 10,5(3) uur | β$^+$ | $^{187}$Os | 3/2$^+$ | |
| $^{187m1}$Ir | 186,15(4) keV | 186,15(4) keV | 186,15(4) keV | 30,3(6) ms | IT | $^{187}$Ir | 9/2$^−$ | |
| $^{187m2}$Ir | 433,81(9) keV | 433,81(9) keV | 433,81(9) keV | 152(12) ns | | | 11/2$^−$ | |
| $^{188}$Ir | 77 | 111 | 187,958853(8) | 41,5(5) uur | β$^+$ | $^{188}$Os | 1$^−$ | |
| $^{188m}$Ir | 970(30) keV | 970(30) keV | 970(30) keV | 4,2(2) ms | IT | $^{188}$Ir | 7$^+$ | |
| $^{188m}$Ir | 970(30) keV | 970(30) keV | 970(30) keV | 4,2(2) ms | β$^+$ (rare) | $^{188}$Os | 7$^+$ | |
| $^{189}$Ir | 77 | 112 | 188,958719(14) | 13,2(1) dagen | EV | $^{189}$Os | 3/2$^+$ | |
| $^{189m1}$Ir | 372,18(4) keV | 372,18(4) keV | 372,18(4) keV | 13,3(3) ms | IT | $^{189}$Ir | 11/2$^−$ | |
| $^{189m2}$Ir | 2333,3(4) keV | 2333,3(4) keV | 2333,3(4) keV | 3,7(2) ms | | | 25/2$^+$ | |
| $^{190}$Ir | 77 | 113 | 189,9605460(18) | 11,78(10) dagen | β$^+$ | $^{190}$Os | 4$^−$ | |
| $^{190m1}$Ir | 26,1(1) keV | 26,1(1) keV | 26,1(1) keV | 1,120(3) uur | IT | $^{190}$Ir | (1$^−$) | |
| $^{190m2}$Ir | 36,154(25) keV | 36,154(25) keV | 36,154(25) keV | > 2 µs | | | 4$^+$ | |
| $^{190m3}$Ir | 376,4(1) keV | 376,4(1) keV | 376,4(1) keV | 3,087(12) uur | | | 11$^−$ | |
| $^{191}$Ir | 77 | 114 | 190,9605940(18) | stabiel | stabiel | stabiel | 3/2$^+$ | 0,373(2) |
| $^{191m1}$Ir | 171,24(5) keV | 171,24(5) keV | 171,24(5) keV | 4,94(3) s | IT | $^{191}$Ir | 11/2$^−$ | |
| $^{191m2}$Ir | 2120(40) keV | 2120(40) keV | 2120(40) keV | 5,5(7) s | | | | |
| $^{192}$Ir | 77 | 115 | 191,9626050(18) | 73,827(13) dagen | β$^−$ (95,24%) | $^{192}$Pt | 4$^+$ | |
| $^{192}$Ir | 77 | 115 | 191,9626050(18) | 73,827(13) dagen | EV (4,76%) | $^{192}$Os | 4$^+$ | |
| $^{192m1}$Ir | 56,720(5) keV | 56,720(5) keV | 56,720(5) keV | 1,45(5) min | | | 1$^−$ | |
| $^{192m2}$Ir | 168,14(12) keV | 168,14(12) keV | 168,14(12) keV | 241(9) jaar | | | (11$^−$) | |
| $^{193}$Ir | 77 | 116 | 192,9629264(18) | stabiel | stabiel | stabiel | 3/2$^+$ | 0,627(2) |
| $^{193m}$Ir | 80,240(6) keV | 80,240(6) keV | 80,240(6) keV | 10,53(4) dagen | IT | $^{193}$Ir | 11/2$^−$ | |
| $^{194}$Ir | 77 | 117 | 193,9650784(18) | 19,28(13) uur | β$^−$ | $^{194}$Pt | 1$^−$ | |
| $^{194m1}$Ir | 147,078(5) keV | 147,078(5) keV | 147,078(5) keV | 31,85(24) ms | IT | $^{194}$Ir | (4$^+$) | |
| $^{194m2}$Ir | 370(70) keV | 370(70) keV | 370(70) keV | 171(11) dagen | | | (10,11)$^−$ | |
| $^{195}$Ir | 77 | 118 | 194,9659796(18) | 2,5(2) uur | β$^−$ | $^{195}$Pt | 3/2$^+$ | |
| $^{195m}$Ir | 100(5) keV | 100(5) keV | 100(5) keV | 3,8(2) uur | β$^−$ (95%) | $^{195}$Pt | 11/2$^−$ | |
| $^{195m}$Ir | 100(5) keV | 100(5) keV | 100(5) keV | 3,8(2) uur | IT (5%) | $^{195}$Ir | 11/2$^−$ | |
| $^{196}$Ir | 77 | 119 | 195,96840(4) | 52(1) s | β$^−$ | $^{196}$Pt | (0$^−$) | |
| $^{196m}$Ir | 210(40) keV | 210(40) keV | 210(40) keV | 1,40(2) uur | β$^−$ (99,7%) | $^{196}$Pt | (10, 11$^−$) | |
| $^{196m}$Ir | 210(40) keV | 210(40) keV | 210(40) keV | 1,40(2) uur | IT | $^{196}$Ir | (10, 11$^−$) | |
| $^{197}$Ir | 77 | 120 | 196,969653(22) | 5,8(5) min | β$^−$ | $^{197}$Pt | 3/2$^+$ | |
| $^{197m}$Ir | 115(5) keV | 115(5) keV | 115(5) keV | 8,9(3) min | β$^−$ (99,75%) | $^{197}$Pt | 11/2$^−$ | |
| $^{197m}$Ir | 115(5) keV | 115(5) keV | 115(5) keV | 8,9(3) min | IT (0,25%) | $^{197}$Ir | 11/2$^−$ | |
| $^{198}$Ir | 77 | 121 | 197,97228(21) | 8(1) s | β$^−$ | $^{198}$Pt | | |
| $^{199}$Ir | 77 | 122 | 198,97380(4) | 20 s | β$^−$ | $^{199}$Pt | 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
$^{164}$Ir · $^{164m}$Ir · $^{165}$Ir · $^{165m}$Ir · $^{166}$Ir · $^{166m}$Ir · $^{167}$Ir · $^{167m}$Ir · $^{168}$Ir · $^{168m}$Ir · $^{169}$Ir · $^{169m}$Ir · $^{170}$Ir · $^{170m}$Ir · $^{171}$Ir · $^{171m}$Ir · $^{172}$Ir · $^{172m}$Ir · $^{173}$Ir · $^{173m}$Ir · $^{174}$Ir · $^{174m}$Ir · $^{175}$Ir · $^{176}$Ir · $^{177}$Ir · $^{178}$Ir · $^{179}$Ir · $^{180}$Ir · $^{181}$Ir · $^{182}$Ir · $^{183}$Ir · $^{184}$Ir · $^{184m1}$Ir · $^{184m2}$Ir · $^{185}$Ir · $^{186}$Ir · $^{186m}$Ir · $^{187}$Ir · $^{187m1}$Ir · $^{187m2}$Ir · $^{188}$Ir · $^{188m}$Ir · $^{189}$Ir · $^{189m1}$Ir · $^{189m2}$Ir · $^{190}$Ir · $^{190m1}$Ir · $^{190m2}$Ir · $^{190m3}$Ir · $^{191}$Ir · $^{191m1}$Ir · $^{191m2}$Ir · $^{192}$Ir · $^{192m1}$Ir · $^{192m2}$Ir · $^{193}$Ir · $^{193m}$Ir · $^{194}$Ir · $^{194m1}$Ir · $^{194m2}$Ir · $^{195}$Ir · $^{195m}$Ir · $^{196}$Ir · $^{196m}$Ir · $^{197}$Ir · $^{197m}$Ir · $^{198}$Ir · $^{199}$Ir · $^{200}$Ir · $^{201}$Ir · $^{202}$Ir · $^{203}$Ir · $^{204}$Ir · $^{205}$Ir