Talk:Isotopes of oxygen

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start[edit]

  Z   N refs symbol   half-life                   spin              excitation energy
  8   4 A   |O-12    |580(30)E-24 s              |0+
  8   4 B   |O-12    |[0.40(25) MeV]             |0+
  8   4 C   |O-12    |[0.51(16) MeV]             |0+
  8   5 AB  |O-13    |8.58(5) ms                 |(3/2-)
  8   5 C   |O-13    |8.9 ms                     |(3/2-)
  8   6 AC  |O-14    |70.598(18) s               |0+
  8   6 B   |O-14    |70.641(20) s               |0+
  8   7 ABC |O-15    |122.24(16) s               |1/2-
  8   8 ABC |O-16    |STABLE                     |0+
  8   9 ABC |O-17    |STABLE                     |5/2+
  8  10 ABC |O-18    |STABLE                     |0+
  8  11 A   |O-19    |26.464(9) s                |5/2+
  8  11 BC  |O-19    |26.88(5) s                 |5/2+
  8  12 ABC |O-20    |13.51(5) s                 |0+
  8  13 A   |O-21    |3.42(10) s                 |(1/2,3/2,5/2)+
  8  13 B   |O-21    |3.42(10) s                 |(5/2+)
  8  13 C   |O-21    |3.4 s                      |
  8  14 AB  |O-22    |2.25(15) s                 |0+
  8  14 C   |O-22    |2.2 s                      |0+
  8  15 A   |O-23    |90(40) ms                  |1/2+#
  8  15 BC  |O-23    |82(37) ms                  |
  8  16 AB  |O-24    |65(5) ms                   |0+
  8  16 C   |O-24    |~65 ms                     |0+
  8  17 AB  |O-25    |<50 ns                     |(3/2+)#
  8  17 C   |O-25    |<0.05 µs                   |
  8  18 A*BC|O-26    |<40 ns                     |0+
  8  19 A   |O-27    |<260 ns                    |3/2+#
  8  19 B   |O-27    |<260 ns                    |
  8  20 A*B |O-28    |<100 ns                    |0+

Femto 15:18, 19 November 2005 (UTC)

Heaviest isotope[edit]

According to http://www.sciencedaily.com/releases/2007/09/070913170108.htm , the heaviest possible oxygen isotope is O-24. Since this is more up-to-date than the given references here, I think we should delete all higher isotopes from the table. --Roentgenium111 (talk) 16:53, 9 June 2009 (UTC)

Done. --Roentgenium111 (talk) 14:19, 5 July 2009 (UTC)

Heavier oxygen isotopes exist but for too brief a time to undergo beta decay. O-25, O-26, O-27 and O-28 have been discovered see Nubase 2003 at the AMDC website or Nuc. Phys. A 729, 3 (2003) for the discovery references. Darian2 (talk) 05:14, 31 August 2012 (UTC)

Electron capture vs. beta+[edit]

I found it surprising that 15O is listed as ε with a decay energy of 2.8MeV. I expected such a nuclide to perform β+ with a high branching ratio. After investigating the sources, I found some contradictions.

  • Table of Isotopes of 1996: 13O, 14O, and 15O are listed with %EC+%β+ = 100%. The energy level graph shows only the EC.
  • Nudat 2.5 [1][2][3]: 13O, 14O, and 15O are listed with ε : 100.00 %. However the day graph shows β+ with 100% [4][5][6].

If somebody has access to Nuclear Physics A523,1 (1991), please check what's going on here. I don't have the time to go to the library. -- Hokanomono 07:32, 6 July 2009 (UTC)

Shortened footnote format[edit]

I converted the shortened footnotes in this article to a much simpler format using {{sfn}}. If you object to this in any way and want me to revert them, I'd be happy to do so. Just contact me on my talk page.

The old version made an unnecessary call to {{wikicite}} and was more complicated to read in edit-mode. ---- CharlesGillingham (talk) 18:08, 29 September 2010 (UTC)

Factual error[edit]

There's a nonsense statement in the first paragraph. It is written there that "The shortest-lived is 12O with a half-life of 0.4 MeV.". Time cannot be measured using this unit I'm afraid. Please fix it. Regards, 83.6.45.47 (talk) 22:06, 23 November 2011 (UTC)

Oxygen 13[edit]

"Oxygen-13 is an unstable isotope of oxygen to provide any nutrients outside of the zone." What does this mean? Klausok (talk) 11:27, 22 January 2012 (UTC)

Oxygen 14[edit]

The incremental mass value involved in the adding of a neutron to EO8O13 to get EE8O14 is exceptionally low at only 0.983785 amu's

Number of isotopes[edit]

Is there a reason that isotopes O-25 through O-28 are not included in the table? The following statement is confusing: "17 radioactive isotopes have also been characterized, with mass numbers from 12O to 24O, all short-lived, with the longest-lived being 15O with a half-life of 122.24 seconds." The seventeen isotopes refers to O-12 through O-28, but the table only references O-12 through O-24. I shouldn't have to go to the talk pages to find why there is a discrepancy. Jdlawlis (talk) 16:26, 28 April 2013 (UTC)