铒（原子量：167.259(3)）的同位素，其中有6個同位素是在觀測上穩定的。
圖表
|-
| 142Er
| style="text-align:right" | 68
| style="text-align:right" | 74
| 141.97002(54)#
| 10# μs
| p
| 141Ho
| 0+
|
|
|-
| rowspan=2| 143Er
| style="text-align:right" rowspan=2| 68
| style="text-align:right" rowspan=2| 75
| rowspan=2| 142.96655(43)#
| rowspan=2| 200# ms
| β+
| 143Ho
| rowspan=2|9/2−#
| rowspan=2|
| rowspan=2|
|-
| β+, p
| 142Dy
|-
| 144Er
| style="text-align:right" | 68
| style="text-align:right" | 76
| 143.96038(43)#
| 400# ms [>200 ns]
|
| 144Ho
| 0+
|
|
|-
| rowspan=2|145Er
| rowspan=2 style="text-align:right" | 68
| rowspan=2 style="text-align:right" | 77
| rowspan=2|144.95739(43)#
| rowspan=2|900(300) ms
|
| 145Ho
| rowspan=2|1/2+#
| rowspan=2|
| rowspan=2|
|-
| , （不常見）
| 144Dy
|-
| rowspan=2|146Er
| rowspan=2 style="text-align:right" | 68
| rowspan=2 style="text-align:right" | 78
| rowspan=2|145.95200(32)#
| rowspan=2|1.7(6) s
|
| 146Ho
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| ,
| 145Dy
|-
| rowspan=2|147Er
| rowspan=2 style="text-align:right" | 68
| rowspan=2 style="text-align:right" | 79
| rowspan=2|146.94949(32)#
| rowspan=2|~2.5 s
|
| 147Ho
| rowspan=2|(1/2+)
| rowspan=2|
| rowspan=2|
|-
| ,
| 146Dy
|-
| style="text-indent:1em" | 147mEr
| colspan="3" style="text-indent:2em" | 100(50)# keV
| 2.5(2) s
|
| 147Ho
| (11/2-)
|
|
|-
| rowspan=2|148Er
| rowspan=2 style="text-align:right" | 68
| rowspan=2 style="text-align:right" | 80
| rowspan=2|147.94455(21)#
| rowspan=2|4.6(2) s
| (99.85%)
| 148Ho
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| , (.15%)
| 147Dy
|-
| rowspan=2|149Er
| rowspan=2 style="text-align:right" | 68
| rowspan=2 style="text-align:right" | 81
| rowspan=2|148.94231(3)
| rowspan=2|4(2) s
| (93%)
| 149Ho
| rowspan=2|(1/2+)
| rowspan=2|
| rowspan=2|
|-
| , (7%)
| 148Dy
|-
| rowspan=3 style="text-indent:1em" | 149m1Er
| rowspan=3 colspan="3" style="text-indent:2em" | 741.8(2) keV
| rowspan=3|8.9(2) s
| (96.5%)
| 149Ho
| rowspan=3|(11/2-)
| rowspan=3|
| rowspan=3|
|-
| IT (3.5%)
| 149Er
|-
| , (.18%)
| 148Dy
|-
| style="text-indent:1em" | 149m2Er
| colspan="3" style="text-indent:2em" | 2611.1(3) keV
| 0.61(8) µs
|
|
| (19/2+)
|
|
|-
| style="text-indent:1em" | 149m3Er
| colspan="3" style="text-indent:2em" | 3242.7+X keV
| 4.8(1) µs
|
|
| (27/2-)
|
|
|-
| 150Er
| style="text-align:right" | 68
| style="text-align:right" | 82
| 149.937914(18)
| 18.5(7) s
|
| 150Ho
| 0+
|
|
|-
| 151Er
| style="text-align:right" | 68
| style="text-align:right" | 83
| 150.937449(18)
| 23.5(13) s
|
| 151Ho
| (7/2-)
|
|
|-
| rowspan=2 style="text-indent:1em" | 151m1Er
| rowspan=2 colspan="3" style="text-indent:2em" | 2585.5(6) keV
| rowspan=2|580(20) ms
| IT (95.3%)
| 151Er
| rowspan=2|(27/2-)
| rowspan=2|
| rowspan=2|
|-
| (4.7%)
| 151Ho
|-
| style="text-indent:1em" | 151m2Er
| colspan="3" style="text-indent:2em" | 10286+X keV
| 0.42(5) µs
|
|
| (67/2,69/2,71/2)
|
|
|-
| rowspan=2|152Er
| rowspan=2 style="text-align:right" | 68
| rowspan=2 style="text-align:right" | 84
| rowspan=2|151.935050(11)
| rowspan=2|10.3(1) s
| (90%)
| 148Dy
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| (10%)
| 152Ho
|-
| rowspan=2|153Er
| rowspan=2 style="text-align:right" | 68
| rowspan=2 style="text-align:right" | 85
| rowspan=2|152.935063(9)
| rowspan=2|37.1(2) s
| (53%)
| 149Dy
| rowspan=2|7/2(-)
| rowspan=2|
| rowspan=2|
|-
| (47%)
| 153Ho
|-
| rowspan=2|154Er
| rowspan=2 style="text-align:right" | 68
| rowspan=2 style="text-align:right" | 86
| rowspan=2|153.932783(6)
| rowspan=2|3.73(9) min
| (99.53%)
| 154Ho
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| (.47%)
| 150Dy
|-
| rowspan=2|155Er
| rowspan=2 style="text-align:right" | 68
| rowspan=2 style="text-align:right" | 87
| rowspan=2|154.933209(7)
| rowspan=2|5.3(3) min
| (99.98%)
| 155Ho
| rowspan=2|7/2-
| rowspan=2|
| rowspan=2|
|-
| (.022%)
| 151Dy
|-
| 156Er
| style="text-align:right" | 68
| style="text-align:right" | 88
| 155.931065(26)
| 19.5(10) min
|
| 156Ho
| 0+
|
|
|-
| 157Er
| style="text-align:right" | 68
| style="text-align:right" | 89
| 156.93192(3)
| 18.65(10) min
|
| 157Ho
| 3/2-
|
|
|-
| style="text-indent:1em" | 157mEr
| colspan="3" style="text-indent:2em" | 155.4(3) keV
| 76(6) ms
| IT
| 157Er
| (9/2+)
|
|
|-
| 158Er
| style="text-align:right" | 68
| style="text-align:right" | 90
| 157.929893(27)
| 2.29(6) h
|
| 158Ho
| 0+
|
|
|-
| 159Er
| style="text-align:right" | 68
| style="text-align:right" | 91
| 158.930684(5)
| 36(1) min
|
| 159Ho
| 3/2-
|
|
|-
| style="text-indent:1em" | 159m1Er
| colspan="3" style="text-indent:2em" | 182.602(24) keV
| 337(14) ns
|
|
| 9/2+
|
|
|-
| style="text-indent:1em" | 159m2Er
| colspan="3" style="text-indent:2em" | 429.05(3) keV
| 590(60) ns
|
|
| 11/2-
|
|
|-
| 160Er
| style="text-align:right" | 68
| style="text-align:right" | 92
| 159.929083(26)
| 28.58(9) h
|
| 160Ho
| 0+
|
|
|-
| 161Er
| style="text-align:right" | 68
| style="text-align:right" | 93
| 160.929995(10)
| 3.21(3) h
|
| 161Ho
| 3/2-
|
|
|-
| style="text-indent:1em" | 161mEr
| colspan="3" style="text-indent:2em" | 396.44(4) keV
| 7.5(7) µs
|
|
| 11/2-
|
|
|-
| 162Er
| style="text-align:right" | 68
| style="text-align:right" | 94
| 161.928778(4)
| colspan=3 align=center|觀測上穩定
| 0+
| 0.00139(5)
|
|-
| 163Er
| style="text-align:right" | 68
| style="text-align:right" | 95
| 162.930033(6)
| 75.0(4) min
|
| 163Ho
| 5/2-
|
|
|-
| style="text-indent:1em" | 163mEr
| colspan="3" style="text-indent:2em" | 445.5(6) keV
| 580(100) ns
|
|
| (11/2-)
|
|
|-
| 164Er
| style="text-align:right" | 68
| style="text-align:right" | 96
| 163.929200(3)
| colspan=3 align=center|觀測上穩定'
| 0+
| 0.01601(3)
|
|-
| 165Er
| style="text-align:right" | 68
| style="text-align:right" | 97
| 164.930726(3)
| 10.36(4) h
|
| 165Ho
| 5/2-
|
|
|-
| 166Er
| style="text-align:right" | 68
| style="text-align:right" | 98
| 165.9302931(27)
| colspan=3 align=center|觀測上穩定
| 0+
| 0.33503(36)
|
|-
| 167Er
| style="text-align:right" | 68
| style="text-align:right" | 99
| 166.9320482(27)
| colspan=3 align=center|觀測上穩定
| 7/2+
| 0.22869(9)
|
|-
| style="text-indent:1em" | 167mEr
| colspan="3" style="text-indent:2em" | 207.801(5) keV
| 2.269(6) s
| IT
| 167Er
| 1/2-
|
|
|-
| 168Er
| style="text-align:right" | 68
| style="text-align:right" | 100
| 167.9323702(27)
| colspan=3 align=center|觀測上穩定
| 0+
| 0.26978(18)
|
|-
| 169Er
| style="text-align:right" | 68
| style="text-align:right" | 101
| 168.9345904(27)
| 9.392(18) d
|
| 169Tm
| 1/2-
|
|
|-
| 170Er
| style="text-align:right" | 68
| style="text-align:right" | 102
| 169.9354643(30)
| colspan=3 align=center|觀測上穩定
| 0+
| 0.14910(36)
|
|-
| 171Er
| style="text-align:right" | 68
| style="text-align:right" | 103
| 170.9380298(30)
| 7.516(2) h
|
| 171Tm
| 5/2-
|
|
|-
| style="text-indent:1em" | 171mEr
| colspan="3" style="text-indent:2em" | 198.6(1) keV
| 210(10) ns
|
|
| 1/2-
|
|
|-
| 172Er
| style="text-align:right" | 68
| style="text-align:right" | 104
| 171.939356(5)
| 49.3(3) h
|
| 172Tm
| 0+
|
|
|-
| 173Er
| style="text-align:right" | 68
| style="text-align:right" | 105
| 172.94240(21)#
| 1.434(17) min
|
| 173Tm
| (7/2-)
|
|
|-
| 174Er
| style="text-align:right" | 68
| style="text-align:right" | 106
| 173.94423(32)#
| 3.2(2) min
|
| 174Tm
| 0+
|
|
|-
| 175Er
| style="text-align:right" | 68
| style="text-align:right" | 107
| 174.94777(43)#
| 1.2(3) min
|
| 175Tm
| (9/2+)
|
|
|-
| 176Er
| style="text-align:right" | 68
| style="text-align:right" | 108
| 175.95008(43)#
| 20# s
|
| 176Tm
| 0+
|
|
|-
| 177Er
| style="text-align:right" | 68
| style="text-align:right" | 109
| 176.95405(54)#
| 3# s
|
| 177Tm
| 1/2-#
|
|
|}
参考文獻
- Isotope masses from [https://web.archive.org/web/20080923134436/http://www.nndc.bnl.gov/amdc/index.html Ame2003 Atomic Mass Evaluation] by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
- Isotopic compositions and standard atomic masses from [http://www.iupac.org/publications/pac/2003/7506/7506x0683.html Atomic weights of the elements. Review 2000 (IUPAC Technical Report)] . Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and [http://www.iupac.org/news/archives/2005/atomic-weights_revised05.html Atomic Weights Revised (2005)] .
- Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
** Audi, Bersillon, Blachot, Wapstra. [http://amdc.in2p3.fr/web/nubase_en.html The Nubase2003 evaluation of nuclear and decay properties] , Nuc. Phys. A 729, pp. 3-128 (2003).
** National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the [http://www.nndc.bnl.gov/nudat2/ NuDat 2.1 database] (retrieved Sept. 2005).
* David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition*, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.
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