Talk:Isotopes of oxygen/Archive 1

Archive 1

Data 2003

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. 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 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
  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)

Electron capture vs. beta+

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)

Oxygen 14

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