Lihat sumber Isotop fermium

'''[[Fermium]]''' ('''<sub>100</sub>Fm''') adalah  sebuah [[Unsur kimia sintetis|unsur buatan]], sehingga [[berat atom standar]]nya tidak dapat diberikan. Seperti semua unsur buatan, ia tidak memiliki satu pun [[isotop stabil]]. [[Isotop]] pertama yang ditemukan (dalam [[Luruhan nuklir|luruhan]] nuklir dari [[Uji coba nuklir|pengujian nuklir]]) adalah <sup>255</sup>Fm pada tahun 1952. <sup>250</sup>Fm disintesis secara independen tak lama setelah penemuan <sup>255</sup>Fm. Ada 18 [[Radionuklida|radioisotop]] yang diketahui, mulai dari <sup>241</sup>Fm hingga <sup>260</sup>Fm (<sup>260</sup>Fm belum dikonfirmasi), dan 2 [[isomer nuklir]], <sup>250m</sup>Fm dan <sup>251m</sup>Fm. Isotop yang berumur paling panjang adalah <sup>257</sup>Fm dengan [[waktu paruh]] 100,5 hari, dan isomer yang berumur paling panjang adalah <sup>250m</sup>Fm dengan waktu paruh 1,92 detik.

==Daftar isotop==


| rowspan=2|<sup>241</sup>Fm
| rowspan=2 style="text-align:right" | 100
| rowspan=2 style="text-align:right" | 141
| rowspan=2|241,07421(32)#
| rowspan=2|730(60)&nbsp;[[Mikro-|μ]]dtk
| [[Pembelahan spontan|SF]](>78%)
| (beberapa)
| rowspan=2|5/2#+

| [[Peluruhan alfa|α]] (<14%)
| <sup>237</sup>Cf

| rowspan=2|<sup>242</sup>Fm
| rowspan=2 style="text-align:right" | 100
| rowspan=2 style="text-align:right" | 142
| rowspan=2|242,07343(43)#
| rowspan=2|0,8(2)&nbsp;[[Mili-|m]]dtk
| SF
| (beberapa)
| rowspan=2|0+

| α (langka)
| <sup>238</sup>Cf

| rowspan=3|<sup>243</sup>Fm
| rowspan=3 style="text-align:right" | 100
| rowspan=3 style="text-align:right" | 143
| rowspan=3|243,07447(23)#
| rowspan=3|231(9)&nbsp;mdtk
| α (91%)
| <sup>239</sup>Cf
| rowspan=3|7/2−#

| SF (9%)
| (beberapa)

| β<sup>+</sup> (langka)
| <sup>243</sup>Es

| rowspan=2|<sup>244</sup>Fm
| rowspan=2 style="text-align:right" | 100
| rowspan=2 style="text-align:right" | 144
| rowspan=2|244,07404(22)#
| rowspan=2|3,12(8)&nbsp;mdtk
| SF (99%)
| (beberapa)
| rowspan=2|0+

| α (1%)
| <sup>240</sup>Cf

| rowspan=3|<sup>245</sup>Fm
| rowspan=3 style="text-align:right" | 100
| rowspan=3 style="text-align:right" | 145
| rowspan=3|245,07535(21)#
| rowspan=3|4,2(13)&nbsp;dtk
| α (95,7%)
| <sup>241</sup>Cf
| rowspan=3|1/2+#

| β<sup>+</sup> (4,2%)
| <sup>245</sup>Es

| SF (0,13%)
| (beberapa)

| rowspan=4|<sup>246</sup>Fm
| rowspan=4 style="text-align:right" | 100
| rowspan=4 style="text-align:right" | 146
| rowspan=4|246,075350(17)
| rowspan=4|1,54(4)&nbsp;dtk
| α (85%)
| <sup>242</sup>Cf
| rowspan=4|0+

| β<sup>+</sup> (10%)
| <sup>246</sup>Es

| β<sup>+</sup>, SF (10%)
| (beberapa)

| SF (4,5%)
| (beberapa)

| rowspan=2|<sup>247</sup>Fm
| rowspan=2 style="text-align:right" | 100
| rowspan=2 style="text-align:right" | 147
| rowspan=2|247,07695(12)#
| rowspan=2|31(1)&nbsp;dtk
| α (>50%)
| <sup>243</sup>Cf
| rowspan=2|(7/2+)

| β<sup>+</sup> (<50%)
| <sup>247</sup>Es

| rowspan=3|<sup>248</sup>Fm
| rowspan=3 style="text-align:right" | 100
| rowspan=3 style="text-align:right" | 148
| rowspan=3|248,077186(9)
| rowspan=3|35,1(8)&nbsp;dtk
| α (93%)
| <sup>244</sup>Cf
| rowspan=3|0+

| β<sup>+</sup> (7%)
| <sup>248</sup>Es

| SF (0,10%)
| (beberapa)

| rowspan=2|<sup>249</sup>Fm
| rowspan=2 style="text-align:right" | 100
| rowspan=2 style="text-align:right" | 149
| rowspan=2|249,078928(7)
| rowspan=2|1,6(1)&nbsp;mnt
| β<sup>+</sup> (85%)
| <sup>249</sup>Es
| rowspan=2|(7/2+)#

| α (15%)
| <sup>245</sup>Cf

| rowspan=3|<sup>250</sup>Fm
| rowspan=3 style="text-align:right" | 100
| rowspan=3 style="text-align:right" | 150
| rowspan=3|250,079521(9)
| rowspan=3|30,4(15)&nbsp;mnt
| α (90%)
| <sup>246</sup>Cf
| rowspan=3|0+

| [[Penangkapan elektron|EC]] (10%)
| <sup>250</sup>Es

| SF (6,9%)
| (beberapa)

| style="text-indent:1em" | <sup>250m</sup>Fm
| colspan="3" style="text-indent:2em" | 1199,2(10)&nbsp;keV
| 1,92(5)&nbsp;dtk
| [[Transisi isomerik|IT]]
| <sup>250</sup>Fm
| (8−)

| rowspan=2|<sup>251</sup>Fm
| rowspan=2 style="text-align:right" | 100
| rowspan=2 style="text-align:right" | 151
| rowspan=2|251,081540(16)
| rowspan=2|5,30(8)&nbsp;jam
| β<sup>+</sup> (98,2%)
| <sup>251</sup>Es
| rowspan=2|(9/2−)

| α (1,8%)
| <sup>247</sup>Cf

| style="text-indent:1em" | <sup>251m</sup>Fm
| colspan="3" style="text-indent:2em" | 200,09(11)&nbsp;keV
| 21,1(16)&nbsp;μdtk
|
|
| (5/2+)

| rowspan=3|<sup>252</sup>Fm
| rowspan=3 style="text-align:right" | 100
| rowspan=3 style="text-align:right" | 152
| rowspan=3|252,082467(6)
| rowspan=3|25,39(4)&nbsp;jam
| α (99,99%)
| <sup>248</sup>Cf
| rowspan=3|0+

| SF (0,0023%)
| (beberapa)

| β<sup>+</sup>β<sup>+</sup> (langka)
| <sup>252</sup>Cf

| rowspan=2|<sup>253</sup>Fm
| rowspan=2 style="text-align:right" | 100
| rowspan=2 style="text-align:right" | 153
| rowspan=2|253,085185(4)
| rowspan=2|3,00(12)&nbsp;hri
| EC (88%)
| <sup>253</sup>Es
| rowspan=2|(1/2)+

| α (12%)
| <sup>249</sup>Cf

| rowspan=2|<sup>254</sup>Fm
| rowspan=2 style="text-align:right" | 100
| rowspan=2 style="text-align:right" | 154
| rowspan=2|254,0868544(30)
| rowspan=2|3,240(2)&nbsp;jam
| α (99,94%)
| <sup>250</sup>Cf
| rowspan=2|0+

| SF (0,0592%)
| (beberapa)

| rowspan=2|<sup>255</sup>Fm
| rowspan=2 style="text-align:right" | 100
| rowspan=2 style="text-align:right" | 155
| rowspan=2|255,089964(5)
| rowspan=2|20,07(7)&nbsp;jam
| α
| <sup>251</sup>Cf
| rowspan=2|7/2+

| SF (2,4%)
| (beberapa)

| rowspan=2|<sup>256</sup>Fm
| rowspan=2 style="text-align:right" | 100
| rowspan=2 style="text-align:right" | 156
| rowspan=2|256,091774(8)
| rowspan=2|157,6(13)&nbsp;mnt
| SF (91,9%)
| (beberapa)
| rowspan=2|0+

| α (8,1%)
| <sup>252</sup>Cf

| rowspan=2|<sup>257</sup>Fm
| rowspan=2 style="text-align:right" | 100
| rowspan=2 style="text-align:right" | 157
| rowspan=2|257,095106(7)
| rowspan=2|100,5(2)&nbsp;hri
| α (99,79%)
| <sup>253</sup>Cf
| rowspan=2|(9/2+)

| SF (0,21%)
| (beberapa)

| <sup>258</sup>Fm
| style="text-align:right" | 100
| style="text-align:right" | 158
| 258,09708(22)#
| 370(14)&nbsp;μdtk
| SF
| (beberapa)
| 0+

| <sup>259</sup>Fm
| style="text-align:right" | 100
| style="text-align:right" | 159
| 259,1006(3)#
| 1,5(3)&nbsp;dtk
| SF
| (beberapa)
| 3/2+#

| <sup>260</sup>Fm
| style="text-align:right" | 100
| style="text-align:right" | 160
| 260,10281(55)#
| 4&nbsp;mdtk
| SF
| (beberapa)
| 0+


==Kronologi penemuan isotop==

<sup>260</sup>Fm? tidak dikonfirmasi pada tahun 1997.

==Referensi==

* Massa isotop dari:
**
**
* Komposisi isotop dan massa atom standar dari:
**
**
* Data waktu paruh, spin, dan isomer dipilih dari sumber-sumber berikut.
**
**
**



== Sumber dan atribusi ==

Konten artikel ini diadaptasi dari [https://id.wikipedia.org/w/index.php?title=Isotop+fermium&oldid=22756049 Wikipedia bahasa Indonesia], revisi 22756049 (2023-01-24T06:56:12Z), yang tersedia berdasarkan lisensi Creative Commons Atribusi-BerbagiSerupa (CC BY-SA). Mohon gunakan konten ini secara bijak serta sesuai dengan ketentuan lisensi yang berlaku.