鋂的同位素

鋂是人造元素，没有稳定同位素，也无法确认标准原子质量。目前已发现229Am至247Am（231Am除外）共18种同位素，以及未确认的223Am。其中，243Am最稳定，半衰期7350年。

圖表

|-
| 223Am
| style="text-align:right" | 95
| style="text-align:right" | 128
| 223.04584(32)#
| 10(9) ms
| 
| 219Np
| 9/2–#
|-
| 229Am
| style="text-align:right" | 95
| style="text-align:right" | 134
| 229.04528(11)
| 1.8(15) s
| 
| 225Np
| 5/2–#
|-
| rowspan=2 | 230Am
| rowspan=2 style="text-align:right" | 95
| rowspan=2 style="text-align:right" | 135
| rowspan=2 | 230.04603(15)#
| rowspan=2 | 40(9) s
|  (<70%)
| 230Pu
| rowspan=2 | 1–#
|-
| ,  (>30%)
| (various)
|-
| rowspan=3|232Am
| rowspan=3 style="text-align:right" | 95
| rowspan=3 style="text-align:right" | 137
| rowspan=3|232.04659(32)#
| rowspan=3|79(2) s
|  (98%)
| 232Pu
| rowspan=3|
|-
|  (2%)
| 228Np
|-
| ,  (.069%)
| (various)
|-
| rowspan=2|233Am
| rowspan=2 style="text-align:right" | 95
| rowspan=2 style="text-align:right" | 138
| rowspan=2|233.04635(11)#
| rowspan=2|3.2(8) min
| 
| 233Pu
| rowspan=2|
|-
| 
| 229Np
|-
| rowspan=3|234Am
| rowspan=3 style="text-align:right" | 95
| rowspan=3 style="text-align:right" | 139
| rowspan=3|234.04781(22)#
| rowspan=3|2.32(8) min
|  (99.95%)
| 234Pu
| rowspan=3|
|-
|  (.04%)
| 230Np
|-
| , SF (.0066%)
| (various)
|-
| rowspan=2|235Am
| rowspan=2 style="text-align:right" | 95
| rowspan=2 style="text-align:right" | 140
| rowspan=2|235.04795(13)#
| rowspan=2|9.9(5) min
| 
| 235Pu
| rowspan=2|5/2−#
|-
|  （不常見）
| 231Np
|-
| rowspan=2|236Am
| rowspan=2 style="text-align:right" | 95
| rowspan=2 style="text-align:right" | 141
| rowspan=2|236.04958(11)#
| rowspan=2|3.6(1) min
| 
| 236Pu
| rowspan=2|
|-
| 
| 232Np
|-
| rowspan=2|237Am
| rowspan=2 style="text-align:right" | 95
| rowspan=2 style="text-align:right" | 142
| rowspan=2|237.05000(6)#
| rowspan=2|73.0(10) min
|  (99.97%)
| 237Pu
| rowspan=2|5/2(−)
|-
|  (.025%)
| 233Np
|-
| rowspan=2|238Am
| rowspan=2 style="text-align:right" | 95
| rowspan=2 style="text-align:right" | 143
| rowspan=2|238.05198(5)
| rowspan=2|98(2) min
| 
| 238Pu
| rowspan=2|1+
|-
|  (10−4%)
| 234Np
|-
| style="text-indent:1em" | 238mAm
| colspan="3" style="text-indent:2em" | 2500(200)# keV
| 35(10) µs
|
|
|
|-
| rowspan=2|239Am
| rowspan=2 style="text-align:right" | 95
| rowspan=2 style="text-align:right" | 144
| rowspan=2|239.0530245(26)
| rowspan=2|11.9(1) h
|  (99.99%)
| 239Pu
| rowspan=2|(5/2)−
|-
|  (.01%)
| 235Np
|-
| style="text-indent:1em" | 239mAm
| colspan="3" style="text-indent:2em" | 2500(200) keV
| 163(12) ns
|
|
| (7/2+)
|-
| rowspan=2|240Am
| rowspan=2 style="text-align:right" | 95
| rowspan=2 style="text-align:right" | 145
| rowspan=2|240.055300(15)
| rowspan=2|50.8(3) h
| 
| 240Pu
| rowspan=2|(3−)
|-
|  (1.9×10−4%)
| 236Np
|-
| rowspan=3|241AmMost common isotopes
| rowspan=3 style="text-align:right" | 95
| rowspan=3 style="text-align:right" | 146
| rowspan=3|241.0568291(20)
| rowspan=3|432.2(7) y
| 
| 237Np
| rowspan=3|5/2−
|-
|  (7.4×10−10%)
| 207Tl, 34Si
|-
| SF (4.3×10−10%)
| (various)
|-
| style="text-indent:1em" | 241mAm
| colspan="3" style="text-indent:2em" | 2200(100) keV
| 1.2(3) µs
|
|
|
|-
| rowspan=2|242Am
| rowspan=2 style="text-align:right" | 95
| rowspan=2 style="text-align:right" | 147
| rowspan=2|242.0595492(20)
| rowspan=2|16.02(2) h
|  (82.7%)
| 242Cm
| rowspan=2|1−
|-
|  (17.3%)
| 242Pu
|-
| rowspan=3 style="text-indent:1em" | 242m1Am
| rowspan=3 colspan="3" style="text-indent:2em" | 48.60(5) keV
| rowspan=3|141(2) y
| IT (99.54%)
| 242Am
| rowspan=3|5−
|-
|  (.46%)
| 238Np
|-
| SF (1.5×10−8%)
| (various)
|-
| style="text-indent:1em" | 242m2Am
| colspan="3" style="text-indent:2em" | 2200(80) keV
| 14.0(10) ms
|
|
| (2+,3−)
|-
| rowspan=2|243Am
| rowspan=2 style="text-align:right" | 95
| rowspan=2 style="text-align:right" | 148
| rowspan=2|243.0613811(25)
| rowspan=2|7,370(40) y
| 
| 239Np
| rowspan=2|5/2−
|-
| SF (3.7×10−9%)
| (various)
|-
| 244Am
| style="text-align:right" | 95
| style="text-align:right" | 149
| 244.0642848(22)
| 10.1(1) h
| 
| 244Cm
| (6−)#
|-
| rowspan=2 style="text-indent:1em" | 244mAm
| rowspan=2 colspan="3" style="text-indent:2em" | 86.1(10) keV
| rowspan=2|26(1) min
|  (99.96%)
| 244Cm
| rowspan=2|1+
|-
|  (.0361%)
| 244Pu
|-
| 245Am
| style="text-align:right" | 95
| style="text-align:right" | 150
| 245.066452(4)
| 2.05(1) h
| 
| 245Cm
| (5/2)+
|-
| 246Am
| style="text-align:right" | 95
| style="text-align:right" | 151
| 246.069775(20)
| 39(3) min
| 
| 246Cm
| (7−)
|-
| rowspan=2 style="text-indent:1em" | 246m1Am
| rowspan=2 colspan="3" style="text-indent:2em" | 30(10) keV
| rowspan=2|25.0(2) min
|  (99.99%)
| 246Cm
| rowspan=2|2(−)
|-
| IT (.01%)
| 246Am
|-
| style="text-indent:1em" | 246m2Am
| colspan="3" style="text-indent:2em" | ~2000 keV
| 73(10) µs
|
|
|
|-
| 247Am
| style="text-align:right" | 95
| style="text-align:right" | 152
| 247.07209(11)#
| 23.0(13) min
| 
| 247Cm
| (5/2)#
|}

 参考文獻 

 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).
 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.

Am

Category:镅