铒的同位素

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Believed to undergo  decay to 158Dy or  to 162Dy with a half-life over 140×1012 years
| 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<ref group="n">Believed to undergo  decay to 160Dy or  to 164Dy</ref>
| 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Believed to undergo  decay to 162Dy
| 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Believed to undergo  decay to 163Dy
| 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Believed to undergo  decay to 164Dy
| 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Believed to undergo  decay to 166Dy or  to 170Yb with a half-life over 320×1015 years
| 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 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 Atomic weights of the elements. Review 2000 (IUPAC Technical Report) . Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and 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. 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 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.

Er
Category:铒