钔有244Md至260Md共17种同位素，全部都有放射性，其中258Md最稳定，半衰期51.59天。
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| 符号
|
Z
|
N
|
同位素质量（u）
[n 1][n 2]
|
半衰期
[n 2]
|
衰变
方式[4]
|
衰变
产物
|
原子核
自旋[n 1]
|
| 激发能量[n 1][n 2]
|
| 244Md
|
101
|
143
|
|
6996300000000000000♠0.30+0.19
−0.09 ms
[0.36(14) ms]
|
α
|
240Es
|
3+#
|
| 244mMd
|
200(150)# keV
|
~9 μs
|
IT
|
244Md
|
7+#
|
| 245Md
|
101
|
144
|
245.08081(33)#
|
0.90(25) ms
|
SF
|
(various)
|
(1/2−)#
|
| α （不常见）
|
241Es
|
| 245mMd
|
200(100)# keV
|
400(200) ms
[0.35(+23−16) s]
|
α
|
241Es
|
(7/2+)
|
| β+ （不常见）
|
245Fm
|
| 246Md
|
101
|
145
|
246.08171(28)#
|
1.0(4) s
|
α
|
242Es
|
|
| β+ （不常见）
|
246Fm
|
| 247Md
|
101
|
146
|
247.08152(22)#
|
1.12(22) s
|
SF
|
(various)
|
1/2−#
|
| α （不常见）
|
243Es
|
| 247mMd
|
|
~0.2 s
|
α (99.99%)
|
243Es
|
|
| SF (10−4%)
|
(various)
|
| 248Md
|
101
|
147
|
248.08282(26)#
|
7(3) s
|
β+ (80%)
|
248Fm
|
|
| α (20%)
|
244Es
|
| β+, SF (.05%)
|
(various)
|
| 249Md
|
101
|
148
|
249.08291(22)#
|
24(4) s
|
α (60%)
|
245Es
|
(7/2−)
|
| β+ (40%)
|
249Fm
|
| 249mMd
|
100(100)# keV
|
1.9(9) s
|
|
|
(1/2−)
|
| 250Md
|
101
|
149
|
250.08442(32)#
|
52(6) s
|
β+ (93%)
|
250Fm
|
|
| α (7%)
|
246Es
|
| β+, SF (.02%)
|
(various)
|
| 251Md
|
101
|
150
|
251.084774(20)
|
4.0(5) min
|
β+ (90%)
|
251Fm
|
7/2−#
|
| α (10%)
|
247Es
|
| 252Md
|
101
|
151
|
252.08643(14)#
|
2.3(8) min
|
β+ (50%)
|
252Fm
|
|
| α (50%)
|
248Es
|
| 253Md
|
101
|
152
|
253.08714(3)#
|
12(8) min
[6(+12−3) min]
|
β+
|
253Fm
|
7/2−#
|
| α
|
249Es
|
| 254Md
|
101
|
153
|
254.08959(11)#
|
10(3) min
|
β+
|
254Fm
|
(0−)
|
| α （不常见）
|
250Es
|
| 254mMd
|
50(100)# keV
|
28(8) min
|
β+
|
254Fm
|
(3−)
|
| α （不常见）
|
250Es
|
| 255Md
|
101
|
154
|
255.091084(7)
|
27(2) min
|
β+ (92%)
|
255Fm
|
(7/2−)
|
| α (8%)
|
251Es
|
| SF (.15%)
|
(various)
|
| 256Md
|
101
|
155
|
256.09389(13)#
|
77(2) min
|
β+ (89%)
|
256Fm
|
(1−)
|
| α (11%)
|
252Es
|
| 257Md
|
101
|
156
|
257.0955424(29)
|
5.52(5) h
|
ε (84.8%)
|
257Fm
|
(7/2−)
|
| α (15.2%)
|
253Es
|
| SF (1%)
|
(various)
|
| 258Md
|
101
|
157
|
258.098431(5)
|
51.5(3) d
|
α (99.99%)
|
254Es
|
(8−)#
|
| β− (.0015%)
|
258No
|
| β+ (.0015%)
|
258Fm
|
| 258mMd
|
0(200)# keV
|
57.0(9) min
|
ε (70%)
|
258Fm
|
1−#
|
| SF (20%)
|
(various)
|
| β− (10%)
|
258No
|
| α (1.2%)
|
254Es
|
| 259Md[n 3]
|
101
|
158
|
259.10051(22)#
|
1.60(6) h
|
SF (98.7%)
|
(various)
|
7/2−#
|
| α (1.3%)
|
255Es
|
| 260Md
|
101
|
159
|
260.10365(34)#
|
27.8(8) d
|
SF (85%)
|
(various)
|
|
| α (5%)
|
256Es
|
| ε (5%)
|
260Fm
|
| β− (3.5%)
|
260No
|
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 259No
- 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.
