釓的同位素

釓（原子質量單位：157.25(3)）有6种稳定同位素（154Gd、155Gd、156Gd、157Gd、158Gd、160Gd）和1种放射性同位素（152Gd）存在于自然界，其中丰度24.84%的158Gd最常见。160Gd理论上可以双β衰变，但目前尚未观测到，半衰期至少1.3年。

圖表
|-
| 134Gd
| style="text-align:right" | 64
| style="text-align:right" | 70
| 133.95537(43)#
| 0.4# s
|
|
| 0+
|
|
|-
| 135Gd
| style="text-align:right" | 64
| style="text-align:right" | 71
| 134.95257(54)#
| 1.1(2) s
|
|
| 3/2-
|
|
|-
| 136Gd
| style="text-align:right" | 64
| style="text-align:right" | 72
| 135.94734(43)#
| 1# s [>200 ns]
|
| 136Eu
|
|
|
|-
| rowspan=2|137Gd
| rowspan=2 style="text-align:right" | 64
| rowspan=2 style="text-align:right" | 73
| rowspan=2|136.94502(43)#
| rowspan=2|2.2(2) s
|
| 137Eu
| rowspan=2|7/2+#
| rowspan=2|
| rowspan=2|
|-
| , （不常見）
| 136Sm
|-
| 138Gd
| style="text-align:right" | 64
| style="text-align:right" | 74
| 137.94012(21)#
| 4.7(9) s
|
| 138Eu
| 0+
|
|
|-
| style="text-indent:1em" | 138mGd
| colspan="3" style="text-indent:2em" | 2232.7(11) keV
| 6(1) µs
|
|
| (8-)
|
|
|-
| rowspan=2|139Gd
| rowspan=2 style="text-align:right" | 64
| rowspan=2 style="text-align:right" | 75
| rowspan=2|138.93824(21)#
| rowspan=2|5.7(3) s
|
| 139Eu
| rowspan=2|9/2-#
| rowspan=2|
| rowspan=2|
|-
| , （不常見）
| 138Sm
|-
| style="text-indent:1em" | 139mGd
| colspan="3" style="text-indent:2em" | 250(150)# keV
| 4.8(9) s
|
|
| 1/2+#
|
|
|-
| 140Gd
| style="text-align:right" | 64
| style="text-align:right" | 76
| 139.93367(3)
| 15.8(4) s
|
| 140Eu
| 0+
|
|
|-
| rowspan=2|141Gd
| rowspan=2 style="text-align:right" | 64
| rowspan=2 style="text-align:right" | 77
| rowspan=2|140.932126(21)
| rowspan=2|14(4) s
| (99.97%)
| 141Eu
| rowspan=2|(1/2+)
| rowspan=2|
| rowspan=2|
|-
| , (.03%)
| 140Sm
|-
| rowspan=2 style="text-indent:1em" | 141mGd
| rowspan=2 colspan="3" style="text-indent:2em" | 377.8(2) keV
| rowspan=2|24.5(5) s
| (89%)
| 141Eu
| rowspan=2|(11/2-)
| rowspan=2|
| rowspan=2|
|-
| IT (11%)
| 141Gd
|-
| 142Gd
| style="text-align:right" | 64
| style="text-align:right" | 78
| 141.92812(3)
| 70.2(6) s
|
| 142Eu
| 0+
|
|
|-
| rowspan=3|143Gd
| rowspan=3 style="text-align:right" | 64
| rowspan=3 style="text-align:right" | 79
| rowspan=3|142.92675(22)
| rowspan=3|39(2) s
|
| 143Eu
| rowspan=3|(1/2)+
| rowspan=3|
| rowspan=3|
|-
| , （不常見）
| 139Pm
|-
| , （不常見）
| 142Sm
|-
| rowspan=3 style="text-indent:1em" | 143mGd
| rowspan=3 colspan="3" style="text-indent:2em" | 152.6(5) keV
| rowspan=3|110.0(14) s
|
| 143Eu
| rowspan=3|(11/2-)
| rowspan=3|
| rowspan=3|
|-
| , （不常見）
| 139Pm
|-
| , （不常見）
| 142Sm
|-
| 144Gd
| style="text-align:right" | 64
| style="text-align:right" | 80
| 143.92296(3)
| 4.47(6) min
|
| 144Eu
| 0+
|
|
|-
| 145Gd
| style="text-align:right" | 64
| style="text-align:right" | 81
| 144.921709(20)
| 23.0(4) min
|
| 145Eu
| 1/2+
|
|
|-
| rowspan=2 style="text-indent:1em" | 145mGd
| rowspan=2 colspan="3" style="text-indent:2em" | 749.1(2) keV
| rowspan=2|85(3) s
| IT (94.3%)
| 145Gd
| rowspan=2|11/2-
| rowspan=2|
| rowspan=2|
|-
| (5.7%)
| 145Eu
|-
| 146Gd
| style="text-align:right" | 64
| style="text-align:right" | 82
| 145.918311(5)
| 48.27(10) d
|
| 146Eu
| 0+
|
|
|-
| 147Gd
| style="text-align:right" | 64
| style="text-align:right" | 83
| 146.919094(3)
| 38.06(12) h
|
| 147Eu
| 7/2-
|
|
|-
| style="text-indent:1em" | 147mGd
| colspan="3" style="text-indent:2em" | 8587.8(4) keV
| 510(20) ns
|
|
| (49/2+)
|
|
|-
|148Gd
| style="text-align:right" | 64
| style="text-align:right" | 84
|147.918115(3)
|74.6(30) a
|
| 144Sm
|0+
|
|
|-
| rowspan=2|149Gd
| rowspan=2 style="text-align:right" | 64
| rowspan=2 style="text-align:right" | 85
| rowspan=2|148.919341(4)
| rowspan=2|9.28(10) d
|
| 149Eu
| rowspan=2|7/2-
| rowspan=2|
| rowspan=2|
|-
| (4.34×10−4%)
| 145Sm
|-
|150Gd
| style="text-align:right" | 64
| style="text-align:right" | 86
|149.918659(7)
|1.79(8)×106 a
|
| 146Sm
|0+
|
|
|-
| rowspan=2|151Gd
| rowspan=2 style="text-align:right" | 64
| rowspan=2 style="text-align:right" | 87
| rowspan=2|150.920348(4)
| rowspan=2|124(1) d
|
| 151Eu
| rowspan=2|7/2-
| rowspan=2|
| rowspan=2|
|-
| (10−6%)
| 147Sm
|-
| 152Gd
| style="text-align:right" | 64
| style="text-align:right" | 88
| 151.9197910(27)
| 1.08(8)×1014 a
|
| 148Sm
| 0+
| 0.0020(1)
|
|-
| 153Gd
| style="text-align:right" | 64
| style="text-align:right" | 89
| 152.9217495(27)
| 240.4(10) d
|
| 153Eu
| 3/2-
|
|
|-
| style="text-indent:1em" | 153m1Gd
| colspan="3" style="text-indent:2em" | 95.1737(12) keV
| 3.5(4) µs
|
|
| (9/2+)
|
|
|-
| style="text-indent:1em" | 153m2Gd
| colspan="3" style="text-indent:2em" | 171.189(5) keV
| 76.0(14) µs
|
|
| (11/2-)
|
|
|-
| 154Gd
| style="text-align:right" | 64
| style="text-align:right" | 90
| 153.9208656(27)
| colspan="3" style="text-align:center;"|觀測上穩定
| 0+
| 0.0218(3)
|
|-
| 155Gd
| style="text-align:right" | 64
| style="text-align:right" | 91
| 154.9226220(27)
| colspan="3" style="text-align:center;"|觀測上穩定
| 3/2-
| 0.1480(12)
|
|-
| style="text-indent:1em" | 155mGd
| colspan="3" style="text-indent:2em" | 121.05(19) keV
| 31.97(27) ms
| IT
| 155Gd
| 11/2-
|
|
|-
| 156Gd
| 0+
| 0.2186(19)
|
|-
| 161Gd
| style="text-align:right" | 64
| style="text-align:right" | 97
| 160.9296692(29)
| 3.646(3) min
|
| 161Tb
| 5/2-
|
|
|-
| 162Gd
| style="text-align:right" | 64
| style="text-align:right" | 98
| 161.930985(5)
| 8.4(2) min
|
| 162Tb
| 0+
|
|
|-
| 163Gd
| style="text-align:right" | 64
| style="text-align:right" | 99
| 162.93399(32)#
| 68(3) s
|
| 163Tb
| 7/2+#
|
|
|-
| 164Gd
| style="text-align:right" | 64
| style="text-align:right" | 100
| 163.93586(43)#
| 45(3) s
|
| 164Tb
| 0+
|
|
|-
| 165Gd
| style="text-align:right" | 64
| style="text-align:right" | 101
| 164.93938(54)#
| 10.3(16) s
|
| 165Tb
| 1/2-#
|
|
|-
| 166Gd
| style="text-align:right" | 64
| style="text-align:right" | 102
| 165.94160(64)#
| 4.8(10) s
|
| 166Tb
| 0+
|
|
|-
| 167Gd
| style="text-align:right" | 64
| style="text-align:right" | 103
| 166.94557(64)#
| 3# s
|
| 167Tb
| 5/2-#
|
|
|-
| 168Gd
| style="text-align:right" | 64
| style="text-align:right" | 104
| 167.94836(75)#
| 300# ms
|
| 168Tb
| 0+
|
|
|-
| 169Gd
| style="text-align:right" | 64
| style="text-align:right" | 105
| 168.95287(86)#
| 1# s
|
| 169Tb
| 7/2-#
|
|
|}

参考文獻
引用
来源

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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