鐨的同位素

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同位素

圖表[编辑]

符號 Z(p N(n 同位素質量(u 半衰期 衰變
方式
[1][n 1]
衰變
產物
原子核
自旋
激發能量
241Fm 100 141 241.07421(32)# 730(60) µs SF(>78%) (various) 5/2#+
α (<14%) 237Cf
242Fm 100 142 242.07343(43)# 0.8(2) ms SF (various) 0+
α (不常見) 238Cf
243Fm 100 143 243.07447(23)# 231(9) ms α (91%) 239Cf 7/2−#
SF (9%) (various)
β+ (不常見) 243Es
244Fm 100 144 244.07404(22)# 3.12(8) ms SF (99%) (various) 0+
α (1%) 240Cf
245Fm 100 145 245.07535(21)# 4.2(13) s α (95.7%) 241Cf 1/2+#
β+ (4.2%) 245Es
SF (.13%) (various)
246Fm 100 146 246.075350(17) 1.54(4) s α (85%) 242Cf 0+
β+ (10%) 246Es
β+, SF (10%) (various)
SF (4.5%) (various)
247Fm 100 147 247.07695(12)# 31(1) s α (>50%) 243Cf (7/2+)
β+ (<50%) 247Es
248Fm 100 148 248.077186(9) 35.1(8) s α (93%) 244Cf 0+
β+ (7%) 248Es
SF (.10%) (various)
249Fm 100 149 249.078928(7) 1.6(1) min β+ (85%) 249Es (7/2+)#
α (15%) 245Cf
250Fm 100 150 250.079521(9) 30.4(15) min α (90%) 246Cf 0+
ε (10%) 250Es
SF (6.9×10−3%) (various)
250mFm 1199.2(10) keV 1.92(5) s IT 250Fm (8−)
251Fm 100 151 251.081540(16) 5.30(8) h β+ (98.2%) 251Es (9/2−)
α (1.8%) 247Cf
251mFm 200.09(11) keV 21.1(16) µs (5/2+)
252Fm 100 152 252.082467(6) 25.39(4) h α (99.99%) 248Cf 0+
SF (.0023%) (various)
β+β+ (不常見) 252Cf
253Fm 100 153 253.085185(4) 3.00(12) d ε (88%) 253Es (1/2)+
α (12%) 249Cf
254Fm 100 154 254.0868544(30) 3.240(2) h α (99.94%) 250Cf 0+
SF (.0592%) (various)
255Fm 100 155 255.089964(5) 20.07(7) h α 251Cf 7/2+
SF (2.4×10−5%) (various)
256Fm 100 156 256.091774(8) 157.6(13) min SF (91.9%) (various) 0+
α (8.1%) 252Cf
257Fm[n 2] 100 157 257.095106(7) 100.5(2) d α (99.79%) 253Cf (9/2+)
SF (.21%) (various)
258Fm 100 158 258.09708(22)# 370(14) µs SF (various) 0+
259Fm 100 159 259.1006(3)# 1.5(3) s SF (various) 3/2+#
260Fm[n 3][n 4] 100 160 260.10281(55)# 4 ms 0+

備註:畫上#號的數據代表沒有經過實驗的證明,只是理論推測而已,而用括號括起來的代表數據不確定性。

同位素列表
鑀的同位素 鐨的同位素 钔的同位素

註釋[编辑]

  1. ^ Abbreviations:
    EC: Electron capture
    IT: Isomeric transition
    SF: Spontaneous fission
  2. ^ Heaviest nuclide produced via neutron capture
  3. ^ Discovery of this isotope is unconfirmed
  4. ^ Not directly synthesized, occurs as decay product of 260Md

参考文獻[编辑]

  1. ^ Universal Nuclide Chart. nucleonica. (需要註冊 (說明)).