Table
| nuclide symbol |
Z(p) | N(n) | isotopic mass (u) |
half-life | decay mode(s) |
daughter isotope(s) |
nuclear spin |
|---|---|---|---|---|---|---|---|
| excitation energy | |||||||
| 242Fm | 100 | 142 | 242.07343(43)# | 0.8(2) ms | SF | (various) | 0+ |
| α (rare) | 238Cf | ||||||
| 243Fm | 100 | 143 | 243.07435(23)# | 210(60) ms |
α (60%) | 239Cf | 7/2-# |
| β+ (40%) | 243Es | ||||||
| SF (.57%) | (various) | ||||||
| 244Fm | 100 | 144 | 244.07408(30)# | 3.3(5) ms | SF (99%) | (various) | 0+ |
| α (1%) | 240Cf | ||||||
| 245Fm | 100 | 145 | 245.07539(30)# | 4.2(13) s | α (95.7%) | 241Cf | 1/2+# |
| β+ (4.2%) | 245Es | ||||||
| SF (.13%) | (various) | ||||||
| 246Fm | 100 | 146 | 246.07530(4) | 1.1(2) s | α (85%) | 242Cf | 0+ |
| β+ (10%) | 246Es | ||||||
| β+, SF (10%) | (various) | ||||||
| SF (4.5%) | (various) | ||||||
| 247Fm | 100 | 147 | 247.07685(15)# | 29(1) s | α (50%) | 243Cf | (7/2+) |
| β+ (50%) | 247Es | ||||||
| 248Fm | 100 | 148 | 248.077195(13) | 36(2) s | α (99%) | 244Cf | 0+ |
| β+ (1%) | 248Es | ||||||
| SF (.05%) | (various) | ||||||
| 249Fm | 100 | 149 | 249.07903(11)# | 2.6(7) min | β+ (85%) | 249Es | (7/2+)# |
| α (15%) | 245Cf | ||||||
| 250Fm | 100 | 150 | 250.079521(13) | 30(3) min | α (90%) | 246Cf | 0+ |
| EC (10%) | 250Es | ||||||
| SF (6×10−4%) | (various) | ||||||
| 250mFm | 1500(300)# keV | 1.8(1) s | IT | 250Fm | 7,8# | ||
| 251Fm | 100 | 151 | 251.081575(9) | 5.30(8) h | β+ (98.2%) | 251Es | (9/2-) |
| α (1.8%) | 247Cf | ||||||
| 251mFm | 191(2) keV | 15.2(23) µs | (5/2+) | ||||
| 252Fm | 100 | 152 | 252.082467(6) | 25.39(4) h | α (99.99%) | 248Cf | 0+ |
| SF (.0023%) | (various) | ||||||
| β+β+ (rare) | 252Cf | ||||||
| 253Fm | 100 | 153 | 253.085185(4) | 3.00(12) d | EC (88%) | 253Es | (1/2)+ |
| α (12%) | 249Cf | ||||||
| 254Fm | 100 | 154 | 254.0868542(30) | 3.240(2) h | α (99.94%) | 250Cf | 0+ |
| SF (.06%) | (various) | ||||||
| 255Fm | 100 | 155 | 255.089962(5) | 20.07(7) h | α | 251Cf | 7/2+ |
| SF (2×10−5%) | (various) | ||||||
| 256Fm | 100 | 156 | 256.091773(8) | 157.6(13) min | SF (91.9%) | (various) | 0+ |
| α (8.1%) | 252Cf | ||||||
| 257Fm | 100 | 157 | 257.095105(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 | 100 | 160 | 260.10268(54)# | 1# min | 0+ | ||
Read more about this topic: Isotopes Of Fermium
Famous quotes containing the word table:
“the moderate Aristotelian city
Of darning and the Eight-Fifteen, where Euclid’s geometry
And Newton’s mechanics would account for our experience,
And the kitchen table exists because I scrub it.”
—W.H. (Wystan Hugh)
““A sigh for every so many breath,
And for every so many sigh a death.
That’s what I always tell my wife
Is the multiplication table of life.””
—Robert Frost (1874–1963)
“Many a time I have seen my mother leap up from the dinner table to engage the swarming flies with an improvised punkah, and heard her rejoice and give humble thanks simultaneously that Baltimore was not the sinkhole that Washington was.”
—H.L. (Henry Lewis)