Talk:Isotopes of carbon/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
  6   2 A   |C-8     |2.0(4)E-21 s               |0+
  6   2 B   |C-8     |[230(50) keV]              |0+
  6   2 C   |C-8     |[0.25(4) MeV]              |0+
  6   3 ABC |C-9     |126.5(9) ms                |(3/2-)
  6   4 AC  |C-10    |19.290(12) s               |0+
  6   4 B   |C-10    |19.26(5) s                 |0+
  6   5 A   |C-11    |20.39(2) min               |3/2-
  6   5 BC  |C-11    |20.334(24) min             |3/2-
  6   6 ABC |C-12    |STABLE                     |0+
  6   7 ABC |C-13    |STABLE                     |1/2-
  6   8 AB  |C-14    |5.70(3)E+3 a               |0+
  6   8 C   |C-14    |5715. a                    |0+
  6   9 ABC |C-15    |2.449(5) s                 |1/2+
  6  10 AB  |C-16    |0.747(8) s                 |0+
  6  10 C   |C-16    |~0.750 s                   |0+
  6  11 A   |C-17    |193(5) ms                  |(3/2+)
  6  11 B   |C-17    |193(13) ms                 |
  6  11 C   |C-17    |0.19 s                     |3/2+
  6  12 ABC |C-18    |92(2) ms                   |0+
  6  13 A   |C-19    |46.2(23) ms                |(1/2+)
  6  13 B   |C-19    |49(4) ms                   |
  6  13 C   |C-19    |0.05 s                     |1/2+
  6  14 A   |C-20    |16(3) ms                   |0+
  6  14 B   |C-20    |14(+6-5) ms                |0+
  6  14 C   |C-20    |0.01 s                     |0+
  6  15 AB  |C-21    |<30 ns                     |(1/2+)#
  6  15 C   |C-21    |<0.03 µs                   |
  6  16 A   |C-22    |6.2(13) ms                 |0+
  6  16 B   |C-22    |6.1(+14-12) ms             |0+
  6  16 C   |C-22    |9 ms                       |0+

Femto 15:21, 19 November 2005 (UTC)

Talk

This might be a newbie question but why is there not indicated which isotopes are natural occuring and which are artificial prepared? Carnelain 12:59, 17 October 2007 (UTC)

Saw this in my contribution list, still no answer. Carnelain (talk) 00:15, 22 April 2008 (UTC)

Isotopic signature

I've tried to clarify the paleoclimate section with some minor grammatical etc edits. It is worth noting that carbon isotope ratios do not function as a direct proxy for temperature, but are related to productivity, which in turn is temperature related. Hope this helps.Orbitalforam (talk) 11:14, 30 September 2010 (UTC)