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editCan someone clarify what the numbers in brackets mean? Verisimilus T 22:57, 13 May 2007 (UTC)
- It's the margin of error. For example, 109.771(20) means 109.771±0.020 --Daniel bg 12:56, 14 May 2007 (UTC)
- Thanks! Verisimilus T 13:49, 14 May 2007 (UTC)
Are You sure the target atoms are O18? How does 8O18 plus 1H1 become 9F18? WFPM69.154.111.115 (talk) 09:15, 10 April 2008 (UTC) It must emit a neutron upon bombardment 67.163.4.93 (talk) 18:43, 11 April 2008 (UTC)PB
Has anyone ever tried to store 9F18 at near absolute zero, to see if it still has enough free energy to break up into a free proton state and then decay to 8O18?WFPM75.42.238.223 (talk) 16:47, 11 January 2010 (UTC)
::The Berkeley data shows 8O18(p,n) reaction as a source for 9F19 are they wrong? They also show a 8O17(p,Gamma) reaction as a source of 9F18. What about that? WFPMWFPM (talk) 18:44, 14 April 2008 (UTC)
- If 8F18 spontaneously goes (by electron capture) to 8O18, then we have a spontaneous Conversion of a proton or a spontaneous breakup of a deuteron pair, and the 8F18 doesn't have enough free energy to break up (2,23Mev) a deuteron pair. WFPMWFPM (talk) 01:25, 2 November 2008 (UTC)
Merge
editThis article should be merged with fluorine. --Chemicalinterest (talk) 22:00, 28 April 2010 (UTC)
Half life
editFrom the article's inception, the half-life if F18 has been shown as 109.771(20) min. 109 min should equal 1 hr 49 mins, yet the (20) seems to say the half-life is only 20 mins. What does the (20) mean? 71.234.215.133 (talk) 13:49, 24 September 2010 (UTC) Answered above, (20) means .020 minutes.WFPM (talk) 01:10, 6 April 2012 (UTC) But if they were stored at 0 degrees (Kelvin), where would they have the energy to break up a PN pair and then capture an orbital electron and change to EE8O18?WFPM (talk) 01:15, 6 April 2012 (UTC)
- It seems that this notation is not obvious for the majority of readers. I suggest it be replaced for a more common notation (±) or either be removed entirely, like other wikipedia articles that state only the mean half-life figure, since a rather small standard deviation might not be so relevant. Betagamizado (talk) 01:41, 10 July 2020 (UTC)