Talk:Isotopes of potassium/Archive 1

2005
This article is part of 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). &mdash; 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. &mdash; 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 19 13 A   |K-32    |                           |1+# 19 14 AB  |K-33    |<25 ns                     |(3/2+)# 19 14 C   |K-33    |<0.025 µs                  | 19 15 A   |K-34    |<40 ns                     |1+# 19 15 B   |K-34    |<25 ns                     |(1+) 19 15 C   |K-34    |<0.04 µs                   | 19 16 AB  |K-35    |178(8) ms                  |3/2+ 19 16 C   |K-35    |0.19 s                     |3/2+ 19 17 ABC |K-36    |342(2) ms                  |2+ 19 18 ABC |K-37    |1.226(7) s                 |3/2+ 19 19 AB  |K-38    |7.636(18) min              |3+ 19 19 C   |K-38    |7.63 min                   |3+ 19 19 A   |K-38m1  |923.9(6) ms                |0+               |130.50(28) keV 19 19 E   |K-38m1  |924.2(3) ms                |0+               |130.4(3) keV 19 19 C   |K-38m1  |0.924 s                    |0+ 19 19 A   |K-38m2  |21.98(11) µs               |(7+),(5+)        |3458.0(2) keV 19 19 D   |K-38m2  |21.98(11) µs               |7+,(5+)          |3458.0(2) keV 19 20 ABC |K-39    |STABLE                     |3/2+ 19 21 A   |K-40    |1.251(11)E+9 a             |4- 19 21 B   |K-40    |1.248(3)E+9 a              |4- 19 21 C   |K-40    |1.26E+9 a                  |4- 19 21 AE  |K-40m   |336(12) ns                 |0+               |1643.639(11) keV 19 22 ABC |K-41    |STABLE                     |3/2+ 19 23 AC  |K-42    |12.360(12) h               |2- 19 23 B   |K-42    |12.321(25) h               |2- 19 24 ABC |K-43    |22.3(1) h                  |3/2+ 19 25 ABC |K-44    |22.13(19) min              |2- 19 26 AB  |K-45    |17.3(6) min                |3/2+ 19 26 C   |K-45    |17.8 min                   |3/2+ 19 27 A   |K-46    |105(10) s                  |2(-) 19 27 B   |K-46    |105(10) s                  |(2-) 19 27 C   |K-46    |1.8 min                    |2- 19 28 ABC |K-47    |17.50(24) s                |1/2+ 19 29 ABC |K-48    |6.8(2) s                   |(2-) 19 30 AB  |K-49    |1.26(5) s                  |(3/2+) 19 30 C   |K-49    |1.26 s                     | 19 31 AB  |K-50    |472(4) ms                  |(0-,1,2-) 19 31 C   |K-50    |0.472 s                    | 19 32 A   |K-51    |365(5) ms                  |3/2+# 19 32 B   |K-51    |365(5) ms                  |(1/2+,3/2+) 19 32 C   |K-51    |0.365 s                    | 19 33 AB  |K-52    |105(5) ms                  |(2-)# 19 33 C   |K-52    |0.105 s                    | 19 34 AB  |K-53    |30(5) ms                   |(3/2+)# 19 34 C   |K-53    |30. ms                    |3/2+ 19 35 A   |K-54    |10(5) ms                   |2-# 19 35 BC  |K-54    |10(5) ms                   | 19 36 A   |K-55    |3# ms                      |3/2+# 19 36 B   |K-55    |3# ms                      |

Femto 13:32, 18 November 2005 (UTC)
 * (Now outdated). -DePiep (talk) 11:40, 25 April 2020 (UTC)

Separate Potassium Isotope pages
There should be a separate page for 40K (see, it isn't even an article). --116.14.27.127 (talk) 14:20, 2 June 2009 (UTC)


 * Someone started a 40K page. I expanded it but most of the detail here on that isotope should be moved there.Trojancowboy (talk) 22:59, 27 January 2010 (UTC)


 * I linked the table to the pages for 39K page, 40K page, and 41K page. All these need to be expanded and most detail removed from this page.Trojancowboy (talk) 23:10, 27 January 2010 (UTC)

Potassium-40 discrepancy
This article gives two values for the decay branching ratio of Potassium-40. At the top, it says it decays to argon 11.2 percent of the time and calcium 88.8 percent. In the isotope table, the numbers are 10.72 and 89.28. Which figure is correct?

MacsBug (talk) 21:17, 27 March 2013 (UTC)