Isotop fermium
Daftar isotop

| Nuklida | Z> Energi eksitasi | N> Energi eksitasi | Massa isotop (Da) > Energi eksitasi | Waktu paruh | Modepeluruhan | Isotopanak | Spin dan paritas |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 241Fm | 100 | 141 | 241,07421(32)# | 730(60) μdtk | SF(>78%) | (beberapa) | 5/2#+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 241Fm | 100 | 141 | 241,07421(32)# | 730(60) μdtk | α (<14%) | 237Cf | 5/2#+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 242Fm | 100 | 142 | 242,07343(43)# | 0,8(2) mdtk | SF | (beberapa) | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 242Fm | 100 | 142 | 242,07343(43)# | 0,8(2) mdtk | α (langka) | 238Cf | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 243Fm | 100 | 143 | 243,07447(23)# | 231(9) mdtk | α (91%) | 239Cf | 7/2−# |  |  |  |  |  |  |  |  |  |  |  |  |
| 243Fm | 100 | 143 | 243,07447(23)# | 231(9) mdtk | SF (9%) | (beberapa) | 7/2−# |  |  |  |  |  |  |  |  |  |  |  |  |
| 243Fm | 100 | 143 | 243,07447(23)# | 231(9) mdtk | β+ (langka) | 243Es | 7/2−# |  |  |  |  |  |  |  |  |  |  |  |  |
| 244Fm | 100 | 144 | 244,07404(22)# | 3,12(8) mdtk | SF (99%) | (beberapa) | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 244Fm | 100 | 144 | 244,07404(22)# | 3,12(8) mdtk | α (1%) | 240Cf | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 245Fm | 100 | 145 | 245,07535(21)# | 4,2(13) dtk | α (95,7%) | 241Cf | 1/2+# |  |  |  |  |  |  |  |  |  |  |  |  |
| 245Fm | 100 | 145 | 245,07535(21)# | 4,2(13) dtk | β+ (4,2%) | 245Es | 1/2+# |  |  |  |  |  |  |  |  |  |  |  |  |
| 245Fm | 100 | 145 | 245,07535(21)# | 4,2(13) dtk | SF (0,13%) | (beberapa) | 1/2+# |  |  |  |  |  |  |  |  |  |  |  |  |
| 246Fm | 100 | 146 | 246,075350(17) | 1,54(4) dtk | α (85%) | 242Cf | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 246Fm | 100 | 146 | 246,075350(17) | 1,54(4) dtk | β+ (10%) | 246Es | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 246Fm | 100 | 146 | 246,075350(17) | 1,54(4) dtk | β+, SF (10%) | (beberapa) | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 246Fm | 100 | 146 | 246,075350(17) | 1,54(4) dtk | SF (4,5%) | (beberapa) | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 247Fm | 100 | 147 | 247,07695(12)# | 31(1) dtk | α (>50%) | 243Cf | (7/2+) |  |  |  |  |  |  |  |  |  |  |  |  |
| 247Fm | 100 | 147 | 247,07695(12)# | 31(1) dtk | β+ (<50%) | 247Es | (7/2+) |  |  |  |  |  |  |  |  |  |  |  |  |
| 248Fm | 100 | 148 | 248,077186(9) | 35,1(8) dtk | α (93%) | 244Cf | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 248Fm | 100 | 148 | 248,077186(9) | 35,1(8) dtk | β+ (7%) | 248Es | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 248Fm | 100 | 148 | 248,077186(9) | 35,1(8) dtk | SF (0,10%) | (beberapa) | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 249Fm | 100 | 149 | 249,078928(7) | 1,6(1) mnt | β+ (85%) | 249Es | (7/2+)# |  |  |  |  |  |  |  |  |  |  |  |  |
| 249Fm | 100 | 149 | 249,078928(7) | 1,6(1) mnt | α (15%) | 245Cf | (7/2+)# |  |  |  |  |  |  |  |  |  |  |  |  |
| 250Fm | 100 | 150 | 250,079521(9) | 30,4(15) mnt | α (90%) | 246Cf | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 250Fm | 100 | 150 | 250,079521(9) | 30,4(15) mnt | EC (10%) | 250Es | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 250Fm | 100 | 150 | 250,079521(9) | 30,4(15) mnt | SF (6,9×10−3%) | (beberapa) | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 250mFm | 1199,2(10) keV | 1199,2(10) keV | 1199,2(10) keV | 1,92(5) dtk | IT | 250Fm | (8−) |  |  |  |  |  |  |  |  |  |  |  |  |
| 251Fm | 100 | 151 | 251,081540(16) | 5,30(8) jam | β+ (98,2%) | 251Es | (9/2−) |  |  |  |  |  |  |  |  |  |  |  |  |
| 251Fm | 100 | 151 | 251,081540(16) | 5,30(8) jam | α (1,8%) | 247Cf | (9/2−) |  |  |  |  |  |  |  |  |  |  |  |  |
| 251mFm | 200,09(11) keV | 200,09(11) keV | 200,09(11) keV | 21,1(16) μdtk |  |  | (5/2+) |  |  |  |  |  |  |  |  |  |  |  |  |
| 252Fm | 100 | 152 | 252,082467(6) | 25,39(4) jam | α (99,99%) | 248Cf | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 252Fm | 100 | 152 | 252,082467(6) | 25,39(4) jam | SF (0,0023%) | (beberapa) | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 252Fm | 100 | 152 | 252,082467(6) | 25,39(4) jam | β+β+ (langka) | 252Cf | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 253Fm | 100 | 153 | 253,085185(4) | 3,00(12) hri | EC (88%) | 253Es | (1/2)+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 253Fm | 100 | 153 | 253,085185(4) | 3,00(12) hri | α (12%) | 249Cf | (1/2)+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 254Fm | 100 | 154 | 254,0868544(30) | 3,240(2) jam | α (99,94%) | 250Cf | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 254Fm | 100 | 154 | 254,0868544(30) | 3,240(2) jam | SF (0,0592%) | (beberapa) | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 255Fm | 100 | 155 | 255,089964(5) | 20,07(7) jam | α | 251Cf | 7/2+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 255Fm | 100 | 155 | 255,089964(5) | 20,07(7) jam | SF (2,4×10−5%) | (beberapa) | 7/2+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 256Fm | 100 | 156 | 256,091774(8) | 157,6(13) mnt | SF (91,9%) | (beberapa) | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 256Fm | 100 | 156 | 256,091774(8) | 157,6(13) mnt | α (8,1%) | 252Cf | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 257Fm | 100 | 157 | 257,095106(7) | 100,5(2) hri | α (99,79%) | 253Cf | (9/2+) |  |  |  |  |  |  |  |  |  |  |  |  |
| 257Fm | 100 | 157 | 257,095106(7) | 100,5(2) hri | SF (0,21%) | (beberapa) | (9/2+) |  |  |  |  |  |  |  |  |  |  |  |  |
| 258Fm | 100 | 158 | 258,09708(22)# | 370(14) μdtk | SF | (beberapa) | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
| 259Fm | 100 | 159 | 259,1006(3)# | 1,5(3) dtk | SF | (beberapa) | 3/2+# |  |  |  |  |  |  |  |  |  |  |  |  |
| 260Fm | 100 | 160 | 260,10281(55)# | 4 mdtk | SF | (beberapa) | 0+ |  |  |  |  |  |  |  |  |  |  |  |  |
Header & footer tabel ini:  view 
↑  mFm –  Isomer nuklir tereksitasi.
↑  ( ) –  Ketidakpastian (1σ) diberikan dalam bentuk ringkas dalam tanda kurung setelah digit terakhir yang sesuai.
↑  # –  Massa atom bertanda #: nilai dan ketidakpastian yang diperoleh bukan dari data eksperimen murni, tetapi setidaknya sebagian dari tren dari Permukaan Massa (trends from the Mass Surface, TMS).
↑  
Mode peluruhan:


EC:Penangkapan elektron

IT:Transisi isomerik

SF:Fisi spontan
↑  ( ) nilai spin –  Menunjukkan spin dengan argumen penempatan yang lemah.
↑  # –  Nilai yang ditandai # tidak murni berasal dari data eksperimen, tetapi setidaknya sebagian dari tren nuklida tetangga (trends of neighboring nuclides, TNN).
↑  Nuklida paling berat yang diproduksi melalui penangkapan elektron
↑  Penemuan isotop ini belum dikonfirmasi
↑  Tidak disintesis secara langsung, terjadi sebagai produk peluruhan dari 260Md