硒的同位素

硒（原子量：78.96(3)）共有39個同位素，其中有5個同位素是穩定的。

圖表
|-
| rowspan=2|65Se
| rowspan=2 style="text-align:right" | 34
| rowspan=2 style="text-align:right" | 31
| rowspan=2|64.96466(64)#
| rowspan=2|99.9%)
| 65As
| rowspan=2|3/2-#
| rowspan=2|
| rowspan=2|
|-
| , (64Ge
|-
| 66Se
| style="text-align:right" | 34
| style="text-align:right" | 32
| 65.95521(32)#
| 33(12) ms
|
| 66As
| 0+
|
|
|-
| rowspan=2|67Se
| rowspan=2 style="text-align:right" | 34
| rowspan=2 style="text-align:right" | 33
| rowspan=2|66.95009(21)#
| rowspan=2|133(11) ms
| (99.5%)
| 67As
| rowspan=2|5/2-#
| rowspan=2|
| rowspan=2|
|-
| , (.5%)
| 66Ge
|-
| 68Se
| style="text-align:right" | 34
| style="text-align:right" | 34
| 67.94180(4)
| 35.5(7) s
|
| 68As
| 0+
|
|
|-
| rowspan=2|69Se
| rowspan=2 style="text-align:right" | 34
| rowspan=2 style="text-align:right" | 35
| rowspan=2|68.93956(4)
| rowspan=2|27.4(2) s
| (99.955%)
| 69As
| rowspan=2|(1/2-)
| rowspan=2|
| rowspan=2|
|-
| , (.045%)
| 68Ge
|-
| style="text-indent:1em" | 69m1Se
| colspan="3" style="text-indent:2em" | 39.4(1) keV
| 2.0(2) µs
|
|
| 5/2-
|
|
|-
| style="text-indent:1em" | 69m2Se
| colspan="3" style="text-indent:2em" | 573.9(10) keV
| 955(16) ns
|
|
| 9/2+
|
|
|-
| 70Se
| style="text-align:right" | 34
| style="text-align:right" | 36
| 69.93339(7)
| 41.1(3) min
|
| 70As
| 0+
|
|
|-
| 71Se
| style="text-align:right" | 34
| style="text-align:right" | 37
| 70.93224(3)
| 4.74(5) min
|
| 71As
| 5/2-
|
|
|-
| style="text-indent:1em" | 71m1Se
| colspan="3" style="text-indent:2em" | 48.79(5) keV
| 5.6(7) µs
|
|
| 1/2- to 9/2-
|
|
|-
| style="text-indent:1em" | 71m2Se
| colspan="3" style="text-indent:2em" | 260.48(10) keV
| 19.0(5) µs
|
|
| (9/2)+
|
|
|-
| 72Se
| style="text-align:right" | 34
| style="text-align:right" | 38
| 71.927112(13)
| 8.40(8) d
|
| 72As
| 0+
|
|
|-
| 73Se
| style="text-align:right" | 34
| style="text-align:right" | 39
| 72.926765(11)
| 7.15(8) h
|
| 73As
| 9/2+
|
|
|-
| rowspan=2 style="text-indent:1em" | 73mSe
| rowspan=2 colspan="3" style="text-indent:2em" | 25.71(4) keV
| rowspan=2|39.8(13) min
| IT
| 73Se
| rowspan=2|3/2-
| rowspan=2|
| rowspan=2|
|-
|
| 73As
|-
| 74Se
| style="text-align:right" | 34
| style="text-align:right" | 40
| 73.9224764(18)
| colspan=3 align=center|觀測上穩定
| 0+
| 0.0089(4)
|
|-
| 75Se
| style="text-align:right" | 34
| style="text-align:right" | 41
| 74.9225234(18)
| 119.779(4) d
|
| 75As
| 5/2+
|
|
|-
| 76Se
| style="text-align:right" | 34
| style="text-align:right" | 42
| 75.9192136(18)
| colspan=3 align=center|**'
| 0+
| 0.0937(29)
|
|-
| 77Se
| style="text-align:right" | 34
| style="text-align:right" | 43
| 76.9199140(18)
| colspan=3 align=center|**'
| 1/2-
| 0.0763(16)
|
|-
| style="text-indent:1em" | 77mSe
| colspan="3" style="text-indent:2em" | 161.9223(7) keV
| 17.36(5) s
| IT
| 77Se
| 7/2+
|
|
|-
| 78Se
| style="text-align:right" | 34
| style="text-align:right" | 44
| 77.9173091(18)
| colspan=3 align=center|**'
| 0+
| 0.2377(28)
|
|-
|
| style="text-align:right" | 34
| style="text-align:right" | 45
| 78.9184991(18)
| 3.27(8)×105 y
|
| 79Br
| 7/2+
|
|
|-
| rowspan=2 style="text-indent:1em" | 79mSe
| rowspan=2 colspan="3" style="text-indent:2em" | 95.77(3) keV
| rowspan=2|3.92(1) min
| IT (99.944%)
| 79Se
| rowspan=2|1/2-
| rowspan=2|
| rowspan=2|
|-
| (.056%)
| 79Br
|-
|
| style="text-align:right" | 34
| style="text-align:right" | 46
| 79.9165213(21)
| colspan=3 align=center|觀測上穩定
| 0+
| 0.4961(41)
|
|-
| 81Se
| style="text-align:right" | 34
| style="text-align:right" | 47
| 80.9179925(22)
| 18.45(12) min
|
| 81Br
| 1/2-
|
|
|-
| rowspan=2 style="text-indent:1em" | 81mSe
| rowspan=2 colspan="3" style="text-indent:2em" | 102.99(6) keV
| rowspan=2|57.28(2) min
| IT (99.948%)
| 81Se
| rowspan=2|7/2+
| rowspan=2|
| rowspan=2|
|-
| (.052%)
| 81Br
|-
| 82Se
| style="text-align:right" | 34
| style="text-align:right" | 48
| 81.9166994(22)
| 0.97(5)×1020 y
|
| 82Kr
| 0+
| 0.0873(22)
|
|-
| 83Se
| style="text-align:right" | 34
| style="text-align:right" | 49
| 82.919118(4)
| 22.3(3) min
|
| 83Br
| 9/2+
|
|
|-
| style="text-indent:1em" | 83mSe
| colspan="3" style="text-indent:2em" | 228.50(20) keV
| 70.1(4) s
|
| 83Br
| 1/2-
|
|
|-
| 84Se
| style="text-align:right" | 34
| style="text-align:right" | 50
| 83.918462(16)
| 3.1(1) min
|
| 84Br
| 0+
|
|
|-
| 85Se
| style="text-align:right" | 34
| style="text-align:right" | 51
| 84.92225(3)
| 31.7(9) s
|
| 85Br
| (5/2+)#
|
|
|-
| 86Se
| style="text-align:right" | 34
| style="text-align:right" | 52
| 85.924272(17)
| 15.3(9) s
|
| 86Br
| 0+
|
|
|-
| rowspan=2|87Se
| rowspan=2 style="text-align:right" | 34
| rowspan=2 style="text-align:right" | 53
| rowspan=2|86.92852(4)
| rowspan=2|5.50(12) s
| (99.64%)
| 87Br
| rowspan=2|(5/2+)#
| rowspan=2|
| rowspan=2|
|-
| , (.36%)
| 86Br
|-
| rowspan=2|88Se
| rowspan=2 style="text-align:right" | 34
| rowspan=2 style="text-align:right" | 54
| rowspan=2|87.93142(5)
| rowspan=2|1.53(6) s
| (99.01%)
| 88Br
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| , (.99%)
| 88Br
|-
| rowspan=2|89Se
| rowspan=2 style="text-align:right" | 34
| rowspan=2 style="text-align:right" | 55
| rowspan=2|88.93645(32)#
| rowspan=2|0.41(4) s
| (92.2%)
| 89Br
| rowspan=2|(5/2+)#
| rowspan=2|
| rowspan=2|
|-
| , (7.8%)
| 88Br
|-
| rowspan=2|90Se
| rowspan=2 style="text-align:right" | 34
| rowspan=2 style="text-align:right" | 56
| rowspan=2|89.93996(43)#
| rowspan=2|300# ms [>300 ns]
| ,
| 89Br
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
|
| 90Br
|-
| rowspan=2|91Se
| rowspan=2 style="text-align:right" | 34
| rowspan=2 style="text-align:right" | 57
| rowspan=2|90.94596(54)#
| rowspan=2|270(50) ms
| (79%)
| 91Br
| rowspan=2|1/2+#
| rowspan=2|
| rowspan=2|
|-
| ,
| 90Br
|-
| 92Se
| style="text-align:right" | 34
| style="text-align:right" | 58
| 91.94992(64)#
| 100# ms [>300 ns]
|
| 92Br
| 0+
|
|
|-
| 93Se
| style="text-align:right" | 34
| style="text-align:right" | 59
| 92.95629(86)#
| 50# ms [>300 ns]
|
|
| 1/2+#
|
|
|-
| 94Se
| style="text-align:right" | 34
| style="text-align:right" | 60
| 93.96049(86)#
| 20# ms [>300 ns]
|
|
| 0+
|
|
|}

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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