鍆有244Md至260Md共17種同位素,全部都有放射性,其中258Md最穩定,半衰期51.59天。
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符號
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Z
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N
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同位素質量(u) [n 1][n 2]
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半衰期 [n 2]
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衰變 方式[4]
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衰變 產物
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原子核 自旋[n 1]
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激發能量[n 1][n 2]
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244Md
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101
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143
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6996300000000000000♠0.30+0.19 −0.09 ms [0.36(14) ms]
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α
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240Es
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3+#
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244mMd
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200(150)# keV
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~9 μs
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IT
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244Md
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7+#
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245Md
|
101
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144
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245.08081(33)#
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0.90(25) ms
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SF
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(various)
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(1/2−)#
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α (不常見)
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241Es
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245mMd
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200(100)# keV
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400(200) ms [0.35(+23−16) s]
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α
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241Es
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(7/2+)
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β+ (不常見)
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245Fm
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246Md
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101
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145
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246.08171(28)#
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1.0(4) s
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α
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242Es
|
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β+ (不常見)
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246Fm
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247Md
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101
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146
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247.08152(22)#
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1.12(22) s
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SF
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(various)
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1/2−#
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α (不常見)
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243Es
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247mMd
|
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~0.2 s
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α (99.99%)
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243Es
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SF (10−4%)
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(various)
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248Md
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101
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147
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248.08282(26)#
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7(3) s
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β+ (80%)
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248Fm
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α (20%)
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244Es
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β+, SF (.05%)
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(various)
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249Md
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101
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148
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249.08291(22)#
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24(4) s
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α (60%)
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245Es
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(7/2−)
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β+ (40%)
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249Fm
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249mMd
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100(100)# keV
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1.9(9) s
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|
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(1/2−)
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250Md
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101
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149
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250.08442(32)#
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52(6) s
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β+ (93%)
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250Fm
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α (7%)
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246Es
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β+, SF (.02%)
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(various)
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251Md
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101
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150
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251.084774(20)
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4.0(5) min
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β+ (90%)
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251Fm
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7/2−#
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α (10%)
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247Es
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252Md
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101
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151
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252.08643(14)#
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2.3(8) min
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β+ (50%)
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252Fm
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α (50%)
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248Es
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253Md
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101
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152
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253.08714(3)#
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12(8) min [6(+12−3) min]
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β+
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253Fm
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7/2−#
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α
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249Es
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254Md
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101
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153
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254.08959(11)#
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10(3) min
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β+
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254Fm
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(0−)
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α (不常見)
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250Es
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254mMd
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50(100)# keV
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28(8) min
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β+
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254Fm
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(3−)
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α (不常見)
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250Es
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255Md
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101
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154
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255.091084(7)
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27(2) min
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β+ (92%)
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255Fm
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(7/2−)
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α (8%)
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251Es
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SF (.15%)
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(various)
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256Md
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101
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155
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256.09389(13)#
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77(2) min
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β+ (89%)
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256Fm
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(1−)
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α (11%)
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252Es
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257Md
|
101
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156
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257.0955424(29)
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5.52(5) h
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ε (84.8%)
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257Fm
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(7/2−)
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α (15.2%)
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253Es
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SF (1%)
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(various)
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258Md
|
101
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157
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258.098431(5)
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51.5(3) d
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α (99.99%)
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254Es
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(8−)#
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β− (.0015%)
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258No
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β+ (.0015%)
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258Fm
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258mMd
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0(200)# keV
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57.0(9) min
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ε (70%)
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258Fm
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1−#
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SF (20%)
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(various)
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β− (10%)
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258No
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α (1.2%)
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254Es
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259Md[n 3]
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101
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158
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259.10051(22)#
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1.60(6) h
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SF (98.7%)
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(various)
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7/2−#
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α (1.3%)
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255Es
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260Md
|
101
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159
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260.10365(34)#
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27.8(8) d
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SF (85%)
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(various)
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α (5%)
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256Es
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ε (5%)
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260Fm
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β− (3.5%)
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260No
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Close
畫上#號的數據代表沒有經過實驗的証明,僅為理論推測。
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 (頁面存檔備份,存於互聯網檔案館), Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (頁面存檔備份,存於互聯網檔案館) (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.