Talk:Isotopes of silicon/Archive 1

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Archive 1

Data 2003

This article is part of Wikipedia:Wikiproject Isotopes. Please keep style and phrasings consistent across the set of pages.

Old 2005 post

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
 14   8 ABC |Si-22   |29(2) ms                   |0+
 14   9 A   |Si-23   |42.3(4) ms                 |3/2+#
 14   9 B   |Si-23   |42.3(4) ms                 |
 14   9 C   |Si-23   |40.7 ms                    |
 14  10 ABC |Si-24   |140(8) ms                  |0+
 14  11 AB  |Si-25   |220(3) ms                  |5/2+
 14  11 C   |Si-25   |221 ms                     |5/2+
 14  12 ABC |Si-26   |2.234(13) s                |0+
 14  13 AB  |Si-27   |4.16(2) s                  |5/2+
 14  13 C   |Si-27   |4.14 s                     |5/2+
 14  14 ABC |Si-28   |STABLE                     |0+
 14  15 ABC |Si-29   |STABLE                     |1/2+
 14  16 ABC |Si-30   |STABLE                     |0+
 14  17 ABC |Si-31   |157.3(3) min               |3/2+
 14  18 AB  |Si-32   |132(13) a                  |0+
 14  18 C   |Si-32   |1.6E+2 a                   |0+
 14  19 AB  |Si-33   |6.18(18) s                 |(3/2+)
 14  19 C   |Si-33   |6.1 s                      |(3/2+)
 14  20 ABC |Si-34   |2.77(20) s                 |0+
 14  21 A   |Si-35   |780(120) ms                |7/2-#
 14  21 B   |Si-35   |0.78(12) s                 |
 14  21 C   |Si-35   |0.9 s                      |
 14  22 ABC |Si-36   |0.45(6) s                  |0+
 14  23 AB  |Si-37   |90(60) ms                  |(7/2-)#
 14  23 C   |Si-37   |~0.09 s                    |
 14  24 A   |Si-38   |90# ms [>1 µs]             |0+
 14  24 BC  |Si-38   |>1 µs                      |0+
 14  25 A   |Si-39   |90# ms [>1 µs]             |7/2-#
 14  25 B   |Si-39   |47.5(20) ms                |(7/2-)
 14  25 C   |Si-39   |> 1 µs                     |
 14  26 A   |Si-40   |20# ms [>200 ns]           |0+
 14  26 B   |Si-40   |33.0(10) ms                |0+
 14  26 C   |Si-40   |>0.2 µs                    |0+
 14  27 A   |Si-41   |30# ms [>200 ns]           |7/2-#
 14  27 B   |Si-41   |20.0(25) ms                |
 14  27 C   |Si-41   |>0.2 µs                    |
 14  28 A   |Si-42   |5# ms [>200 ns]            |0+
 14  28 B   |Si-42   |13(4) ms                   |0+
 14  28 C   |Si-42   |>0.2 µs                    |0+
 14  29 A   |Si-43   |15# ms [>260 ns]           |3/2-#
 14  29 B   |Si-43   |>260 ns                    |
 14  30 AB  |Si-44   |10# ms                     |0+

Femto 13:22, 18 November 2005 (UTC)

Inconsistent Half-Lifes

Above the table, the article states that silicon-32 has a half-life of about 170 years, yet in the table, it clearly states its half-life is 132 years. Is the table or the article closer? This should be fixed. —Preceding unsigned comment added by Elium2 (talk • contribs) 16:00, 16 January 2010 (UTC)

As of today, http://www.nndc.bnl.gov/nudat2/reCenter.jsp?z=14&n=18, shows a 1/2 life of 153 years. PRONIZ (talk) 17:45, 15 August 2012 (UTC)

I fixed the half-life in the opening of the article. I also added the uncertainty from NuDat 2 (19 y @ 1 σ) to the table. —Edgar.bonet (talk) 08:26, 5 September 2014 (UTC)