decayConstants {georefdatar}

Decay constants

Description

A data set containing some decay constants regular used in earth science and geochronology.

Usage

decayConstants

Format

A data frame with 6 rows and the following 5 columns:

1. name of the radioactive isotope – element symbol and mass number

2. value it's value and

3. err uncertainty as given by the reference. Uncertainty may be NA if not stated.

4. unit of the decay – usually per year (y), in some cases per day (d)

5. refkey key to reference. Also makes the entry in this table unique if there is more than one decay constant per isotope

The following decay constants are included:

• Ar37

• Ar39

• K40

• Rb87
  

Some of them are included more than once in this table because their values changed over time.

References

Stoenner RW, Schaeffer OA, Katcoff S (1965). “Half-lives of argon-37, argon-39, and argon-42.” Science, 148(3675), 1325–1328. doi:10.1126/science.148.3675.1325.

Steiger RH, Jäger E (1977). “Subcommission on geochronology: Convention on the use of decay constants in geo- and cosmochronology.” Earth and Planetary Science Letters, 36(3), 359–362. doi:10.1016/0012-821x(77)90060-7.

Renne PR, Norman EB (2001). “Determination of the half-life of 37Ar by mass spectrometry.” Physical Review C, 63(4), 047302. doi:10.1103/PhysRevC.63.047302, https://link.aps.org/doi/10.1103/PhysRevC.63.047302.

Renne PR, Balco G, Ludwig KR, Mundil R, Min K (2011). “Response to the comment by W.H. Schwarz et al. on ”Joint determination of 40K decay constants and 40Ar*/40K for the Fish Canyon sanidine standard, and improved accuracy for 40Ar/39Ar geochronology” by P.R. Renne et al. (2010).” Geochimica et Cosmochimica Acta, 75(17), 5097–5100. doi:10.1016/j.gca.2011.06.021.

Villa IM, De Bièvre P, Holden NE, Renne PR (2015). “IUPAC-IUGS recommendation on the half life of 87Rb.” Geochimica et Cosmochimica Acta, 164, 382–385. ISSN 0016-7037, doi:10.1016/j.gca.2015.05.025.