{{위키데이터 속성 추적}}
자연계에 존재하는 '''[[어븀]]''' 또는 '''에르븀'''의 [[안정 동위 원소]]는 <sup>162</sup>Er, <sup>164</sup>Er, <sup>166</sup>Er, <sup>167</sup>Er, <sup>168</sup>Er, <sup>170</sup>Er, 이렇게 6개가 존재한다. 이들 중 <sup>162</sup>Er과 <sup>170</sup>Er은 반감기가 존재할 것으로 예상되지만 아직 붕괴되는 모습은 관찰되지 않았으며, 어쩌면 예상과 다르게 붕괴하지 않을 수도 있다.

<sup>166</sup>Er은 자연계에 존재하는 어븀의 안정 동위 원소들 중 가장 풍부하게 존재한다.

인공적으로 합성된 어븀의 동위 원소는 <sup>142</sup>Er부터 <sup>177</sup>Er까지 있다.Er345

== 표 ==
{| class="wikitable" style="font-size:95%; white-space:nowrap"
! rowspan="2" | 핵자<br />수
! Z([[양성자|p]])
! N([[중성자|n]])
! &nbsp;<br />동위 원소 질량 (u)<br />&nbsp;
! rowspan="2" | 반감기
! rowspan="2" | 붕괴<br />방식<ref>http://www.nucleonica.net/unc.aspx</ref><ref group="n">약어:<br />ε: [[전자 포획]]<br />IT: [[이성질핵 전이]]</ref>
! rowspan="2" | 붕괴 생성<br />동위 원소<ref group="n">안정 동위 원소는 굵은체로 표기.</ref>
! rowspan="2" | 핵<br />스핀
! rowspan="2" | 자연계에 존재하는<br />동위 원소<br />범위<br />(몰 분율)
! rowspan="2" | 자연계에 존재하는<br />최대 범위<br />(몰 분율)
|-
! colspan="3" | 들뜬 에너지
|-
| <sup>142</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 74
| 141.97231(47)#
|
|
|
| 0+
|
|
|-
| <sup>143</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 75
| 142.96634(64)#
| 200# ms
|
|
| 9/2-#
|
|
|-
| <sup>144</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 76
| 143.96038(43)#
| 400# ms [>200 ns]
| [[베타 붕괴|β<sup>+</sup>]]
| <sup>144</sup>Ho
| 0+
|
|
|-
| rowspan=2|<sup>145</sup>Er
| rowspan=2 style="text-align:right" | 68
| rowspan=2 style="text-align:right" | 77
| rowspan=2|144.95739(43)#
| rowspan=2|900(300) ms
| β<sup>+</sup>
| <sup>145</sup>Ho
| rowspan=2|1/2+#
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup>, [[양성자 방출|p]] (드묾)
| <sup>144</sup>Dy
|-
| rowspan=2|<sup>146</sup>Er
| 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
| β<sup>+</sup>
| <sup>146</sup>Ho
| rowspan=2|0+
| rowspan=2|
| rowspan=2| 
|-
| β<sup>+</sup>, p
| <sup>145</sup>Dy
|-
| rowspan=2|<sup>147</sup>Er
| rowspan=2 style="text-align:right" | 68
| rowspan=2 style="text-align:right" | 79
| rowspan=2|146.94949(32)#
| rowspan=2|~2.5 s
| β<sup>+</sup>
| <sup>147</sup>Ho
| rowspan=2|(1/2+)
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup>, p
| <sup>146</sup>Dy
|-
| style="text-indent:1em" | <sup>147m</sup>Er
| colspan="3" style="text-indent:2em" | 100(50)# keV
| 2.5(2) s
| β<sup>+</sup>
| <sup>147</sup>Ho
| (11/2-)
|
|
|-
| rowspan=2|<sup>148</sup>Er
| 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
| β<sup>+</sup> (99.85%)
| <sup>148</sup>Ho
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup>, p (0.15%)
| <sup>147</sup>Dy
|-
| rowspan=2|<sup>149</sup>Er
| rowspan=2 style="text-align:right" | 68
| rowspan=2 style="text-align:right" | 81
| rowspan=2|148.94231(3)
| rowspan=2|4(2) s
| β<sup>+</sup> (93%)
| <sup>149</sup>Ho
| rowspan=2|(1/2+)
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup>, p (7%)
| <sup>148</sup>Dy
|-
| rowspan=3 style="text-indent:1em" | <sup>149m1</sup>Er
| rowspan=3 colspan="3" style="text-indent:2em" | 741.8(2) keV
| rowspan=3|8.9(2) s
| β<sup>+</sup> (96.5%)
| <sup>149</sup>Ho
| rowspan=3|(11/2-)
| rowspan=3|
| rowspan=3|
|-
| [[이성질핵 전이|IT]] (3.5%)
| <sup>149</sup>Er
|-
| β<sup>+</sup>, p (0.18%)
| <sup>148</sup>Dy
|-
| style="text-indent:1em" | <sup>149m2</sup>Er
| colspan="3" style="text-indent:2em" | 2611.1(3) keV
| 0.61(8) µs
|
|
| (19/2+)
|
|
|-
| style="text-indent:1em" | <sup>149m3</sup>Er
| colspan="3" style="text-indent:2em" | 3242.7+X keV
| 4.8(1) µs
|
|
| (27/2-)
|
|
|-
| <sup>150</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 82
| 149.937914(18)
| 18.5(7) s
| β<sup>+</sup>
| <sup>150</sup>Ho
| 0+
|
|
|-
| <sup>151</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 83
| 150.937449(18)
| 23.5(13) s
| β<sup>+</sup>
| <sup>151</sup>Ho
| (7/2-)
|
|
|-
| rowspan=2 style="text-indent:1em" | <sup>151m1</sup>Er
| rowspan=2 colspan="3" style="text-indent:2em" | 2585.5(6) keV
| rowspan=2|580(20) ms
| IT (95.3%)
| <sup>151</sup>Er
| rowspan=2|(27/2-)
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup> (4.7%)
| <sup>151</sup>Ho
|-
| style="text-indent:1em" | <sup>151m2</sup>Er
| colspan="3" style="text-indent:2em" | 10286+X keV
| 0.42(5) µs
|
|
| (67/2,69/2,71/2)
|
|
|-
| rowspan=2|<sup>152</sup>Er
| 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
| [[알파 붕괴|α]] (90%)
| <sup>148</sup>Dy
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup> (10%)
| <sup>152</sup>Ho
|-
| rowspan=2|<sup>153</sup>Er
| 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
| α (53%)
| <sup>149</sup>Dy
| rowspan=2|7/2(-)
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup> (47%)
| <sup>153</sup>Ho
|-
| rowspan=2|<sup>154</sup>Er
| 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
| β<sup>+</sup> (99.53%)
| <sup>154</sup>Ho
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| α (0.47%)
| <sup>150</sup>Dy
|-
| rowspan=2|<sup>155</sup>Er
| 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
| β<sup>+</sup> (99.98%)
| <sup>155</sup>Ho
| rowspan=2|7/2-
| rowspan=2|
| rowspan=2|
|-
| α (0.022%)
| <sup>151</sup>Dy
|-
| <sup>156</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 88
| 155.931065(26)
| 19.5(10) min
| β<sup>+</sup>
| <sup>156</sup>Ho
| 0+
|
|
|-
| <sup>157</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 89
| 156.93192(3)
| 18.65(10) min
| β<sup>+</sup>
| <sup>157</sup>Ho
| 3/2-
|
|
|-
| style="text-indent:1em" | <sup>157m</sup>Er
| colspan="3" style="text-indent:2em" | 155.4(3) keV
| 76(6) ms
| IT
| <sup>157</sup>Er
| (9/2+)
|
|
|-
| <sup>158</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 90
| 157.929893(27)
| 2.29(6) h
| [[전자 포획|ε]]
| <sup>158</sup>Ho
| 0+
|
|
|-
| <sup>159</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 91
| 158.930684(5)
| 36(1) min
| β<sup>+</sup>
| <sup>159</sup>Ho
| 3/2-
|
|
|-
| style="text-indent:1em" | <sup>159m1</sup>Er
| colspan="3" style="text-indent:2em" | 182.602(24) keV
| 337(14) ns
|
|
| 9/2+
|
|
|-
| style="text-indent:1em" | <sup>159m2</sup>Er
| colspan="3" style="text-indent:2em" | 429.05(3) keV
| 590(60) ns
|
|
| 11/2-
|
|
|-
| <sup>160</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 92
| 159.929083(26)
| 28.58(9) h
| ε
| <sup>160</sup>Ho
| 0+
|
|
|-
| <sup>161</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 93
| 160.929995(10)
| 3.21(3) h
| β<sup>+</sup>
| <sup>161</sup>Ho
| 3/2-
|
|
|-
| style="text-indent:1em" | <sup>161m</sup>Er
| colspan="3" style="text-indent:2em" | 396.44(4) keV
| 7.5(7) µs
|
|
| 11/2-
|
|
|-
| <sup>162</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 94
| 161.928778(4)
| colspan=3 align=center|'''관찰 안정'''<ref group="n">α 붕괴를 통해 '''<sup>158</sup>Dy'''으로 붕괴하거나 또는 β<sup>+</sup>β<sup>+</sup> 붕괴를 통해 '''<sup>162</sup>Dy'''으로 붕괴할 수 있으며 반감기는 7.9×10<sup>18</sup>년을 초과할 것으로 예상된다.</ref>
| 0+
| 0.00139(5)
|
|-
| <sup>163</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 95
| 162.930033(6)
| 75.0(4) min
| β<sup>+</sup>
| <sup>163</sup>Ho
| 5/2-
|
|
|-
| style="text-indent:1em" | <sup>163m</sup>Er
| colspan="3" style="text-indent:2em" | 445.5(6) keV
| 580(100) ns
|
|
| (11/2-)
|
|
|-
| <sup>164</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 96
| 163.929200(3)
| colspan=3 align=center|'''안정'''<ref group="n">α 붕괴를 통해 '''<sup>160</sup>Dy'''으로 붕괴하거나 또는 β<sup>+</sup>β<sup>+</sup> 붕괴를 통해 '''<sup>164</sup>Dy'''으로 붕괴할 수 있다.</ref>
| 0+
| 0.01601(3)
|
|-
| <sup>165</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 97
| 164.930726(3)
| 10.36(4) h
| ε
| '''<sup>165</sup>Ho'''
| 5/2-
|
|
|-
| <sup>166</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 98
| 165.9302931(27)
| colspan=3 align=center|'''안정'''<ref group="n">α 붕괴를 통해 '''<sup>162</sup>Dy'''으로 붕괴할 수 있다.</ref>
| 0+
| 0.33503(36)
|
|-
| <sup>167</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 99
| 166.9320482(27)
| colspan=3 align=center|'''안정'''<ref group="n">α 붕괴를 통해 '''<sup>163</sup>Dy'''으로 붕괴할 수 있다.</ref>
| 7/2+
| 0.22869(9)
|
|-
| style="text-indent:1em" | <sup>167m</sup>Er
| colspan="3" style="text-indent:2em" | 207.801(5) keV
| 2.269(6) s
| IT
| <sup>167</sup>Er
| 1/2-
|
|
|-
| <sup>168</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 100
| 167.9323702(27)
| colspan=3 align=center|'''안정'''<ref group="n">α 붕괴를 통해 '''<sup>164</sup>Dy'''으로 붕괴할 수 있다.</ref>
| 0+
| 0.26978(18)
|
|-
| <sup>169</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 101
| 168.9345904(27)
| 9.392(18) d
| β<sup>-</sup>
| '''<sup>169</sup>Tm'''
| 1/2-
|
|
|-
| <sup>170</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 102
| 169.9354643(30)
| colspan=3 align=center|'''관찰 안정'''<ref group="n">α 붕괴를 통해 <sup>166</sup>Dy으로 붕괴하거나 또는 β<sup>-</sup>β<sup>-</sup> 붕괴를 통해 '''<sup>170</sup>Yb'''으로 붕괴할 수 있으며 반감기는 4.3×10<sup>22</sup> 년을 초과할 것으로 예상된다.</ref>
| 0+
| 0.14910(36)
|
|-
| <sup>171</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 103
| 170.9380298(30)
| 7.516(2) h
| β<sup>-</sup>
| <sup>171</sup>Tm
| 5/2-
|
|
|-
| style="text-indent:1em" | <sup>171m</sup>Er
| colspan="3" style="text-indent:2em" | 198.6(1) keV
| 210(10) ns
|
|
| 1/2-
|
|
|-
| <sup>172</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 104
| 171.939356(5)
| 49.3(3) h
| β<sup>-</sup>
| <sup>172</sup>Tm
| 0+
|
|
|-
| <sup>173</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 105
| 172.94240(21)#
| 1.434(17) min
| β<sup>-</sup>
| <sup>173</sup>Tm
| (7/2-)
|
|
|-
| <sup>174</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 106
| 173.94423(32)#
| 3.2(2) min
| β<sup>-</sup>
| <sup>174</sup>Tm
| 0+
|
|
|-
| <sup>175</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 107
| 174.94777(43)#
| 1.2(3) min
| β<sup>-</sup>
| <sup>175</sup>Tm
| (9/2+)
|
|
|-
| <sup>176</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 108
| 175.95008(43)#
| 20# s
| β<sup>-</sup>
| <sup>176</sup>Tm
| 0+
|
|
|-
| <sup>177</sup>Er
| style="text-align:right" | 68
| style="text-align:right" | 109
| 176.95405(54)#
| 3# s
| β<sup>-</sup>
| <sup>177</sup>Tm
| 1/2-#
|
|
|}
<references group="n" />

== 각주 ==
<references/>

{{동위 원소 색인}}

[[분류:어븀|동위 원소]]
[[분류:어븀 동위 원소| ]]
[[분류:원소별 동위 원소 목록]]