Talk:Isotopes of fermium: Difference between revisions
Jasper Deng (talk | contribs) →Mendelevium: not a forum |
Double sharp (talk | contribs) |
||
| (13 intermediate revisions by 7 users not shown) | |||
| Line 1: | Line 1: | ||
{{WikiProject |
{{WikiProject banner shell|class=List| |
||
{{WikiProject Elements|isotope=yes|importance=Low|isotopes=yes}} |
|||
|isotope=yes |
|||
}} |
|||
|class=List |
|||
|importance=Low |
|||
|isotopes=yes}} |
|||
This article is part of [[Wikipedia:Wikiproject Isotopes]]. Please keep style and phrasings consistent across the set of pages. For later reference and improved reliability, data from all considered multiple sources is collected here. References are denoted by these letters: |
|||
*('''A''') G. Audi, O. Bersillon, J. Blachot, A.H. Wapstra. [http://amdc.in2p3.fr/web/nubase_en.html The Nubase2003 evaluation of nuclear and decay properties], Nuc. Phys. A 729, pp. 3-128 (2003). — Where this source indicates a speculative value, the # mark is also applied to values with weak assignment arguments from other sources, if grouped together. An asterisk after the A means that a comment of some importance may be available in the original. |
|||
*('''B''') National Nuclear Data Center, Brookhaven National Laboratory, information extracted from the [http://www.nndc.bnl.gov/nudat2/ NuDat 2.1 database]. (Retrieved Sept. 2005, from the code of the popup boxes). |
|||
*('''C''') 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. — The CRC uses rounded numbers with implied uncertainties, where this concurs with the range of another source it is treated as exactly equal in this comparison. |
|||
*('''D''') More specific level data from reference B's ''Levels and Gammas database''. |
|||
*('''E''') Same as B but excitation energy replaced with that from D. |
|||
Z N refs symbol half-life spin excitation energy |
|||
100 142 AB |Fm-242 |0.8(2) ms |0+ |
|||
100 142 C |Fm-242 |0.8 ms | |
|||
100 143 A |Fm-243 |210(60) ms |7/2-# |
|||
100 143 B |Fm-243 |0.18(+8-4) s |(7/2+) |
|||
100 143 C |Fm-243 |0.2 s | |
|||
100 144 ABC |Fm-244 |3.3(5) ms |0+ |
|||
100 145 A |Fm-245 |4.2(13) s |1/2+# |
|||
100 145 BC |Fm-245 |4.2(13) s | |
|||
100 146 AB |Fm-246 |1.1(2) s |0+ |
|||
100 146 C |Fm-246 |1.2 s |0+ |
|||
100 147 A |Fm-247 |35(4) s |5/2+# |
|||
100 147 B |Fm-247 |29(1) s |(7/2+) |
|||
100 147 C |Fm-247 |35. s | |
|||
100 147 A* |Fm-247m |9.2(23) s | |non-exist |
|||
100 147 D |Fm-247m |9.2(23) s | |0+W keV |
|||
100 147 C |Fm-247m |9. s | |
|||
100 147 B |Fm-247m |4.3(4) s |(1/2+) |0 MeV |
|||
100 148 A |Fm-248 |36(3) s |0+ |
|||
100 148 B |Fm-248 |36(2) s |0+ |
|||
100 148 C |Fm-248 |34. s |0+ |
|||
100 149 ABC |Fm-249 |2.6(7) min |(7/2+)# |
|||
100 150 ABC |Fm-250 |30(3) min |0+ |
|||
100 150 A |Fm-250m |1.8(1) s |7,8# |1500(300)# keV |
|||
100 150 E |Fm-250m |1.8(1) s |0+ |0+X keV |
|||
100 150 C |Fm-250m |1.8 s | |
|||
100 151 ABC |Fm-251 |5.30(8) h |(9/2-) |
|||
100 151 AD |Fm-251m |15.2(23) µs |(5/2+) |191(2) keV |
|||
100 152 ABC |Fm-252 |25.39(4) h |0+ |
|||
100 153 AB |Fm-253 |3.00(12) d |(1/2)+ |
|||
100 153 C |Fm-253 |3.0 d |1/2+ |
|||
100 154 ABC |Fm-254 |3.240(2) h |0+ |
|||
100 155 ABC |Fm-255 |20.07(7) h |7/2+ |
|||
100 156 ABC |Fm-256 |157.6(13) min |0+ |
|||
100 157 ABC |Fm-257 |100.5(2) d |(9/2+) |
|||
100 158 A |Fm-258 |370(14) µs |0+ |
|||
100 158 B |Fm-258 |370(43) µs |0+ |
|||
100 158 C |Fm-258 |0.37 ms | |
|||
100 159 A |Fm-259 |1.5(3) s |3/2+# |
|||
100 159 BC |Fm-259 |1.5(3) s | |
|||
100 160 A* |Fm-260 |1# min |0+ |
|||
100 160 B |Fm-260 |~4 ms |0+ |
|||
100 160 C |Fm-260 |~4 ms | |
|||
[[User:Femto|Femto]] 11:38, 17 November 2005 (UTC) |
|||
===Talk=== |
|||
---- |
|||
== Mendelevium == |
== Mendelevium == |
||
{{archive top|[[WP:NOTAFORUM]]. Question already answered in the [[mendelevium]] article: no isotopes of fermium beta decay, and it's not our job to speculate on the hypothetical existence of one that does (which, by the way, is highly unlikely).}} |
{{archive top|[[WP:NOTAFORUM]]. Question already answered in the [[mendelevium]] article: no isotopes of fermium beta decay, and it's not our job to speculate on the hypothetical existence of one that does (which, by the way, is highly unlikely).}} |
||
Theoretically, is there an isotope of Fermium that decays into Mendelevium? So far, by extending the rn-process, I have gotten this far, but none decay into Mendelevium. Could maybe an extremely neutron-rich isotope decay into Mendelevium, and if so, what is it/could it be? [[User:32ieww|32ieww]] ([[User talk:32ieww|talk]]) 19:44, 11 February 2017 (UTC) |
Theoretically, is there an isotope of Fermium that decays into Mendelevium? So far, by extending the rn-process, I have gotten this far, but none decay into Mendelevium. Could maybe an extremely neutron-rich isotope decay into Mendelevium, and if so, what is it/could it be? [[User:32ieww|32ieww]] ([[User talk:32ieww|talk]]) 19:44, 11 February 2017 (UTC) |
||
{{archive bottom}} |
{{archive bottom}} |
||
:It's not ''that'' unlikely. [[:File:Superheavy decay modes predicted.png|Probably a lot would]]. The problem is that they're all probably heavier than 260, so there'd be no way to reach them at present. Or rather, there [[Peaceful nuclear explosion|is a way]], but it's banned by treaty. :) [[User:Double sharp|Double sharp]] ([[User talk:Double sharp|talk]]) 15:15, 8 May 2024 (UTC) |
|||
== External links modified == |
|||
Hello fellow Wikipedians, |
|||
I have just modified 2 external links on [[Isotopes of fermium]]. Please take a moment to review [https://en.wikipedia.org/enwiki/w/index.php?diff=prev&oldid=775532540 my edit]. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit [[User:Cyberpower678/FaQs#InternetArchiveBot|this simple FaQ]] for additional information. I made the following changes: |
|||
*Added archive https://web.archive.org/web/20080923135135/http://www.nndc.bnl.gov/amdc/nubase/Nubase2003.pdf to http://www.nndc.bnl.gov/amdc/nubase/Nubase2003.pdf |
|||
*Added archive https://web.archive.org/web/20080923135135/http://www.nndc.bnl.gov/amdc/nubase/Nubase2003.pdf to http://www.nndc.bnl.gov/amdc/nubase/Nubase2003.pdf |
|||
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs. |
|||
{{sourcecheck|checked=false|needhelp=}} |
|||
Cheers.—[[User:InternetArchiveBot|'''<span style="color:darkgrey;font-family:monospace">InternetArchiveBot</span>''']] <span style="color:green;font-family:Rockwell">([[User talk:InternetArchiveBot|Report bug]])</span> 14:13, 15 April 2017 (UTC) |
|||
== External links modified == |
|||
Hello fellow Wikipedians, |
|||
I have just modified one external link on [[Isotopes of fermium]]. Please take a moment to review [[special:diff/810801146|my edit]]. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit [[User:Cyberpower678/FaQs#InternetArchiveBot|this simple FaQ]] for additional information. I made the following changes: |
|||
*Added archive https://web.archive.org/web/20140222061704/http://amdc.in2p3.fr/nubase/Nubase2012-v3.pdf to http://amdc.in2p3.fr/nubase/Nubase2012-v3.pdf |
|||
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs. |
|||
{{sourcecheck|checked=false|needhelp=}} |
|||
Cheers.—[[User:InternetArchiveBot|'''<span style="color:darkgrey;font-family:monospace">InternetArchiveBot</span>''']] <span style="color:green;font-family:Rockwell">([[User talk:InternetArchiveBot|Report bug]])</span> 14:51, 17 November 2017 (UTC) |
|||
== Spontaneous fission of <sup>242</sup>Fm == |
|||
Should it be noted that <sup>242</sup>Fm is the lightest known nuclide to undergo purely spontaneous fission? [[Special:Contributions/129.104.241.214|129.104.241.214]] ([[User talk:129.104.241.214|talk]]) 01:57, 23 October 2023 (UTC) |
|||
== Perhaps <sup>257</sup>Fm is the last beta-stable nuclide whose SF branch is not significant == |
|||
After all, the only known heavier beta-stable nuclides are <sup>258</sup>Fm, <sup>260</sup>Fm, <sup>259</sup>Md, <sup>260</sup>No and <sup>262</sup>No, for all of which the only known decay mode is SF. [[Special:Contributions/129.104.241.214|129.104.241.214]] ([[User talk:129.104.241.214|talk]]) 11:35, 28 November 2023 (UTC) |
|||
== Theoretical alpha half-life of <sup>258,259</sup>Fm == |
|||
See [https://www.nndc.bnl.gov/ensnds/258/Fm/adopted.pdf here] for <sup>258</sup>Fm, and likewise for <sup>259</sup>Fm. Alpha decays for both isotopes are predicted to be very insignificant (alpha partial half-lives similar to longer than that of the most stable isotope of fermium <sup>257</sup>Fm). [[Special:Contributions/129.104.241.242|129.104.241.242]] ([[User talk:129.104.241.242|talk]]) 03:36, 5 May 2024 (UTC) |
|||
Latest revision as of 15:15, 8 May 2024
 | This article is rated List-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||
| ||||||||||||||
Mendelevium
[edit]The following discussion is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.
Theoretically, is there an isotope of Fermium that decays into Mendelevium? So far, by extending the rn-process, I have gotten this far, but none decay into Mendelevium. Could maybe an extremely neutron-rich isotope decay into Mendelevium, and if so, what is it/could it be? 32ieww (talk) 19:44, 11 February 2017 (UTC)
- It's not that unlikely. Probably a lot would. The problem is that they're all probably heavier than 260, so there'd be no way to reach them at present. Or rather, there is a way, but it's banned by treaty. :) Double sharp (talk) 15:15, 8 May 2024 (UTC)
External links modified
[edit]Hello fellow Wikipedians,
I have just modified 2 external links on Isotopes of fermium. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
- Added archive https://web.archive.org/web/20080923135135/http://www.nndc.bnl.gov/amdc/nubase/Nubase2003.pdf to http://www.nndc.bnl.gov/amdc/nubase/Nubase2003.pdf
- Added archive https://web.archive.org/web/20080923135135/http://www.nndc.bnl.gov/amdc/nubase/Nubase2003.pdf to http://www.nndc.bnl.gov/amdc/nubase/Nubase2003.pdf
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 5 June 2024).
- If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
- If you found an error with any archives or the URLs themselves, you can fix them with this tool.
Cheers.—InternetArchiveBot (Report bug) 14:13, 15 April 2017 (UTC)
External links modified
[edit]Hello fellow Wikipedians,
I have just modified one external link on Isotopes of fermium. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
- Added archive https://web.archive.org/web/20140222061704/http://amdc.in2p3.fr/nubase/Nubase2012-v3.pdf to http://amdc.in2p3.fr/nubase/Nubase2012-v3.pdf
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 5 June 2024).
- If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
- If you found an error with any archives or the URLs themselves, you can fix them with this tool.
Cheers.—InternetArchiveBot (Report bug) 14:51, 17 November 2017 (UTC)
Spontaneous fission of 242Fm
[edit]Should it be noted that 242Fm is the lightest known nuclide to undergo purely spontaneous fission? 129.104.241.214 (talk) 01:57, 23 October 2023 (UTC)
Perhaps 257Fm is the last beta-stable nuclide whose SF branch is not significant
[edit]After all, the only known heavier beta-stable nuclides are 258Fm, 260Fm, 259Md, 260No and 262No, for all of which the only known decay mode is SF. 129.104.241.214 (talk) 11:35, 28 November 2023 (UTC)
Theoretical alpha half-life of 258,259Fm
[edit]See here for 258Fm, and likewise for 259Fm. Alpha decays for both isotopes are predicted to be very insignificant (alpha partial half-lives similar to longer than that of the most stable isotope of fermium 257Fm). 129.104.241.242 (talk) 03:36, 5 May 2024 (UTC)