锘是人造元素，没有稳定同位素，也无法确认标准原子质量。它有从248No至260No及262No这14种同位素，以及众多同核异构体。其中，259No最稳定，半衰期58分钟。
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More information 符号, Z ...
| 符号
|
Z
|
N
|
同位素质量（u）
[n 1][n 2]
|
半衰期
[n 2]
|
衰变
方式[1]
|
衰变
产物
|
原子核
自旋[n 1]
|
| 激发能量[n 1][n 2]
|
| 248No
|
102
|
146
|
248.08655(24)#
|
<2 µs
|
|
|
0+
|
| 249No
|
102
|
147
|
249.0878(3)#
|
57(12) s
[54(+15−10) s]
|
|
|
5/2+#
|
| 250No
|
102
|
148
|
250.08756(22)#
|
5.7(8) s
|
SF (99.95%)
|
(various)
|
0+
|
| α (.05%)
|
246Fm
|
| β+ (2.5×10−4%)
|
250Md
|
| 251No
|
102
|
149
|
251.08894(12)#
|
0.78(2) s
|
α (89%)
|
247Fm
|
7/2+#
|
| SF (10%)
|
(various)
|
| β+ (1%)
|
251Md
|
| 251mNo
|
110(180)# keV
|
1.7(10) s
|
|
|
9/2−#
|
| 252No
|
102
|
150
|
252.088967(10)
|
2.27(14) s
|
α (73.09%)
|
248Fm
|
0+
|
| SF (26.9%)
|
(various)
|
| β+ (1%)
|
252Md
|
| 253No[n 3]
|
102
|
151
|
253.090564(7)
|
1.62(15) min
|
α (80%)
|
249Fm
|
(9/2−)#
|
| β+ (20%)
|
253Md
|
| SF (10−3%)
|
(various)
|
| 253mNo
|
129(19) keV
|
31 s
|
|
|
5/2+#
|
| 254No
|
102
|
152
|
254.090956(11)
|
51(10) s
|
α (89.3%)
|
250Fm
|
0+
|
| β+ (10%)
|
254Md
|
| SF (.31%)
|
(various)
|
| 254mNo
|
500(100)# keV
|
0.28(4) s
|
IT (80%)
|
254No
|
0+
|
| α (20%)
|
250Fm
|
| 255No
|
102
|
153
|
255.093191(16)
|
3.1(2) min
|
α (61.4%)
|
251Fm
|
(1/2+)
|
| β+ (38.6%)
|
255Md
|
| 256No
|
102
|
154
|
256.094283(8)
|
2.91(5) s
|
α (99.44%)
|
252Fm
|
0+
|
| SF (.55%)
|
(various)
|
| ε (.01%)
|
256Md
|
| 257No
|
102
|
155
|
257.096888(7)
|
25(2) s
|
α (99%)
|
253Fm
|
(7/2+)
|
| β+ (1%)
|
257Md
|
| 258No
|
102
|
156
|
258.09821(11)#
|
1.2(2) ms
|
SF (99.99%)
|
(various)
|
0+
|
| α (.01%)
|
254Fm
|
| β+β+ （不常见）
|
258Fm
|
| 259No
|
102
|
157
|
259.10103(11)#
|
58(5) min
|
α (75%)
|
255Fm
|
(9/2+)#
|
| ε (25%)
|
259Md
|
| SF (10%)
|
(various)
|
| 260No
|
102
|
158
|
260.10264(22)#
|
106(8) ms
|
SF
|
(various)
|
0+
|
| 262No[n 4]
|
102
|
160
|
262.10746(39)#
|
~5 ms
|
SF
|
(various)
|
0+
|
Close
画上#号的数据代表没有经过实验的证明，仅为理论推测。
Not directly synthesized, occurs as decay product of 257Rf
Not directly synthesized, occurs as decay product of 262Lr
- 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 （页面存档备份，存于互联网档案馆）, Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database （页面存档备份，存于互联网档案馆） (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.
