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
|-
| 152Gdprimordial radionuclide
| 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Believed to undergo  decay to 150Sm</sup>
| 0+
| 0.0218(3)
|
|-
| 155GdFission product
| style="text-align:right" | 64
| style="text-align:right" | 91
| 154.9226220(27)
| colspan="3" style="text-align:center;"|觀測上穩定<ref group="n">Believed to undergo  decay to 151Sm</sup></ref>
| 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
| style="text-align:right" | 64
| style="text-align:right" | 92
| 155.9221227(27)
| colspan="3" style="text-align:center;"|
| 0+
| 0.2047(9)
|
|-
| style="text-indent:1em" | 156mGd
| colspan="3" style="text-indent:2em" | 2137.60(5) keV
| 1.3(1) µs
|
|
| 7-
|
|
|-
| 157Gd
| style="text-align:right" | 64
| style="text-align:right" | 93
| 156.9239601(27)
| colspan="3" style="text-align:center;"|
| 3/2-
| 0.1565(2)
|
|-
| 158Gd
| style="text-align:right" | 64
| style="text-align:right" | 94
| 157.9241039(27)
| colspan="3" style="text-align:center;"|
| 0+
| 0.2484(7)
|
|-
| 159Gd
| style="text-align:right" | 64
| style="text-align:right" | 95
| 158.9263887(27)
| 18.479(4) h
| 
| 159Tb
| 3/2-
|
|
|-
| 160Gd
| style="text-align:right" | 64
| style="text-align:right" | 96
| 159.9270541(27)
| colspan="3" style="text-align:center;"|觀測上穩定Believed to undergo  decay to 160Dy with a half-life over 1.3×1021 years
| 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 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.

Gd
Category:钆