{{위키데이터 속성 추적}}
'''[[아인슈타이늄]]'''은 [[인공 원소]]로 표준 원자량이 정해져 있지 않고 [[안정 동위 원소]]는 존재하지 않는다. 최초로 발견된 [[동위 원소]]는 <sup>253</sup>Es으로, 1952년 [[수소폭탄]] 실험의 [[낙진]]에서 처음 발견되었다. 원자량 240에서 258 사이에 총 19개의 [[방사성 동위 원소]]와 3개의 [[이성질핵]]이 존재한다. 가장 안정한 동위 원소는 471.7일의 [[반감기]]를 갖는 <sup>252</sup>Es이다.

== 표 ==
{| class="wikitable" style="font-size:95%; white-space:nowrap"
! rowspan="2" | 핵종<br />기호
! 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">약자:<br />ε: [[전자 포획]]<br />IT: [[이성질핵 전이]]<br />SF: [[자발 핵분열]]</ref>
! rowspan="2" | 붕괴<br />생성물
! rowspan="2" | 핵<br />스핀
|-
! colspan="3" | 들뜬 에너지
|-
| rowspan=2|<sup>240</sup>Es
| rowspan=2 style="text-align:right" | 99
| rowspan=2 style="text-align:right" | 141
| rowspan=2|240.06892(43)#
| rowspan=2|1# s
| [[알파 붕괴|α]]
| <sup>236</sup>Bk
| rowspan=2|
|-
| [[베타 붕괴|β<sup>+</sup>]] (드묾)
| <sup>240</sup>Cf
|-
| rowspan=2|<sup>241</sup>Es
| rowspan=2 style="text-align:right" | 99
| rowspan=2 style="text-align:right" | 142
| rowspan=2|241.06854(24)#
| rowspan=2|10(5) s<br />[8(+6-5) s]
| α
| <sup>237</sup>Bk
| rowspan=2|(3/2-)
|-
| β<sup>+</sup> (드묾)
| <sup>241</sup>Cf
|-
| rowspan=3|<sup>242</sup>Es
| rowspan=3 style="text-align:right" | 99
| rowspan=3 style="text-align:right" | 143
| rowspan=3|242.06975(35)#
| rowspan=3|13.5(25) s
| α (99.94%)
| <sup>238</sup>Bk
| rowspan=3|
|-
| β<sup>+</sup>, [[자발 핵분열|SF]] (0.6%)
| 다양
|-
| β<sup>+</sup> (드묾)
| <sup>242</sup>Cf
|-
| rowspan=2|<sup>243</sup>Es
| rowspan=2 style="text-align:right" | 99
| rowspan=2 style="text-align:right" | 144
| rowspan=2|243.06955(25)#
| rowspan=2|21(2) s
| β<sup>+</sup> (70%)
| <sup>243</sup>Cf
| rowspan=2|3/2-#
|-
| α (30%)
| <sup>239</sup>Bk
|-
| rowspan=3|<sup>244</sup>Es
| rowspan=3 style="text-align:right" | 99
| rowspan=3 style="text-align:right" | 145
| rowspan=3|244.07088(20)#
| rowspan=3|37(4) s
| β<sup>+</sup> (94.69%)
| <sup>244</sup>Cf
| rowspan=3|
|-
| α (5.3%)
| <sup>240</sup>Bk
|-
| β<sup>+</sup>, SF (0.01%)
| 다양
|-
| rowspan=2|<sup>245</sup>Es
| rowspan=2 style="text-align:right" | 99
| rowspan=2 style="text-align:right" | 146
| rowspan=2|245.07132(22)#
| rowspan=2|1.1(1) min
| β<sup>+</sup> (60%)
| <sup>245</sup>Cf
| rowspan=2|(3/2-)
|-
| α (40%)
| <sup>241</sup>Bk
|-
| rowspan=3|<sup>246</sup>Es
| rowspan=3 style="text-align:right" | 99
| rowspan=3 style="text-align:right" | 147
| rowspan=3|246.07290(24)#
| rowspan=3|7.7(5) min
| β<sup>+</sup> (90.1%)
| <sup>246</sup>Cf
| rowspan=3|4-#
|-
| α (9.9%)
| <sup>242</sup>Bk
|-
| β<sup>+</sup>, SF (0.003%)
| 다양
|-
| rowspan=3|<sup>247</sup>Es
| rowspan=3 style="text-align:right" | 99
| rowspan=3 style="text-align:right" | 148
| rowspan=3|247.07366(3)#
| rowspan=3|4.55(26) min
| β<sup>+</sup> (93%)
| <sup>247</sup>Cf
| rowspan=3|7/2+#
|-
| α (7%)
| <sup>243</sup>Bk
|-
| SF (9&times;10<sup>−5</sup>%)
| 다양
|-
| rowspan=3|<sup>248</sup>Es
| rowspan=3 style="text-align:right" | 99
| rowspan=3 style="text-align:right" | 149
| rowspan=3|248.07547(6)#
| rowspan=3|27(5) min
| β<sup>+</sup> (99.75%)
| <sup>248</sup>Cf
| rowspan=3|2-#,0+#
|-
| α (0.25%)
| <sup>244</sup>Bk
|-
| β<sup>+</sup>, SF (3&times;10<sup>−5</sup>%)
| 다양
|-
| rowspan=2|<sup>249</sup>Es
| rowspan=2 style="text-align:right" | 99
| rowspan=2 style="text-align:right" | 150
| rowspan=2|249.07641(3)#
| rowspan=2|102.2(6) min
| β<sup>+</sup> (99.43%)
| <sup>249</sup>Cf
| rowspan=2|7/2+
|-
| α (0.57%)
| <sup>245</sup>Bk
|-
| rowspan=2|<sup>250</sup>Es
| rowspan=2 style="text-align:right" | 99
| rowspan=2 style="text-align:right" | 151
| rowspan=2|250.07861(11)#
| rowspan=2|8.6(1) h
| β<sup>+</sup> (97%)
| <sup>250</sup>Cf
| rowspan=2|(6+)
|-
| α (3%)
| <sup>246</sup>Bk
|-
| rowspan=2 style="text-indent:1em" | <sup>250m</sup>Es
| rowspan=2 colspan="3" style="text-indent:2em" | 200(150)# keV
| rowspan=2|2.22(5) h
| [[전자 포획|ε]] (99%)
| <sup>250</sup>Cf
| rowspan=2|1(-)
|-
| α (1%)
| <sup>246</sup>Bk
|-
| rowspan=2|<sup>251</sup>Es
| rowspan=2 style="text-align:right" | 99
| rowspan=2 style="text-align:right" | 152
| rowspan=2|251.079992(7)
| rowspan=2|33(1) h
| ε (99.51%)
| <sup>251</sup>Cf
| rowspan=2|(3/2-)
|-
| α (0.49%)
| <sup>247</sup>Bk
|-
| rowspan=3|<sup>252</sup>Es
| rowspan=3 style="text-align:right" | 99
| rowspan=3 style="text-align:right" | 153
| rowspan=3|252.08298(5)
| rowspan=3|471.7(19) d
| α (76%)
| <sup>248</sup>Bk
| rowspan=3|(5-)
|-
| ε (24%)
| <sup>252</sup>Cf
|-
| β<sup>-</sup> (0.01%)
| <sup>252</sup>Fm
|-
| rowspan=2|<sup>253</sup>Es<ref group="n">가장 흔한 동위 원소</ref>
| rowspan=2 style="text-align:right" | 99
| rowspan=2 style="text-align:right" | 154
| rowspan=2|253.0848247(28)
| rowspan=2|20.47(3) d
| α
| <sup>249</sup>Bk
| rowspan=2|7/2+
|-
| SF (8.7&times;10<sup>−6</sup>%)
| 다양
|-
| rowspan=4|<sup>254</sup>Es
| rowspan=4 style="text-align:right" | 99
| rowspan=4 style="text-align:right" | 155
| rowspan=4|254.088022(5)
| rowspan=4|275.7(5) d
| α
| <sup>250</sup>Bk
| rowspan=4|(7+)
|-
| ε (10<sup>−4</sup>%)
| <sup>254</sup>Cf
|-
| SF (3&times;10<sup>−6</sup>%)
| 다양
|-
| β<sup>-</sup> (1.74&times;10<sup>−6</sup>%)
| <sup>254</sup>Fm
|-
| rowspan=5 style="text-indent:1em" | <sup>254m</sup>Es
| rowspan=5 colspan="3" style="text-indent:2em" | 84.2(25) keV
| rowspan=5|39.3(2) h
| β<sup>-</sup> (98%)
| <sup>254</sup>Fm
| rowspan=5|2+
|-
| [[이성질핵 전이|IT]] (3%)
| <sup>254</sup>Es
|-
| α (0.33%)
| <sup>250</sup>Bk
|-
| ε (0.078%)
| <sup>254</sup>Cf
|-
| SF (0.0045%)
| 다양
|-
| rowspan=3|<sup>255</sup>Es
| rowspan=3 style="text-align:right" | 99
| rowspan=3 style="text-align:right" | 156
| rowspan=3|255.090273(12)
| rowspan=3|39.8(12) d
| β<sup>-</sup> (92%)
| <sup>255</sup>Fm
| rowspan=3|(7/2+)
|-
| α (8%)
| <sup>251</sup>Bk
|-
| SF (0.0041%)
| 다양
|-
| <sup>256</sup>Es
| style="text-align:right" | 99
| style="text-align:right" | 157
| 256.09360(11)#
| 25.4(24) min
| β<sup>-</sup>
| <sup>256</sup>Fm
| (1+,0-)
|-
| rowspan=2 style="text-indent:1em" | <sup>256m</sup>Es
| rowspan=2 colspan="3" style="text-indent:2em" | 0(100)# keV
| rowspan=2|7.6 h
| β<sup>-</sup> (99.99%)
| <sup>256</sup>Fm
| rowspan=2|(8+)
|-
| β<sup>-</sup>, SF (0.002%)
| 다양
|-
| rowspan=2|<sup>257</sup>Es
| rowspan=2 style="text-align:right" | 99
| rowspan=2 style="text-align:right" | 158
| rowspan=2|257.09598(44)#
| rowspan=2|7.7(2) d
| β<sup>-</sup>
| <sup>257</sup>Fm
| rowspan=2|7/2+#
|-
| α
| <sup>253</sup>Bk
|-
| <sup>258</sup>Es
| style="text-align:right" | 99
| style="text-align:right" | 159
| 258.09952(32)#
| 3# min
|
|
|
|}

== 각주 ==
{{각주}}
; 내용주
<references group="n" />

{{동위 원소 색인}}
{{전거 통제}}

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