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Chemistry usage of "degree of ionization" means the degree of dissociation. See german wikipedia for further details de:Dissoziationsgrad --Biggerj1 (talk) 10:01, 17 December 2014 (UTC)[reply]

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Isn't it He2+
?

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See title. Alfa-ketosav (talk) 12:44, 16 December 2018 (UTC)[reply]

Physics usage

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In physics, from my experience, the terms degree of ionization, ionization degree, fractional ionization, ionization fraction, and degree of fractional ionization are all used interchangeably and can refer to either

  • the proportion of neutral particles of a particular species that have been ionized,[1] or
  • the proportion of electrons/electron abundance/electron fraction[2][3][4]

depending on the author. Currently, the article only mentions the former. Before I change the article to reflect the existence of both meanings, I think additional comment is needed from others with more experience than myself. (Note the lack of diversity in the sources I reference.) CoronalMassAffection (talk) 06:58, 10 November 2023 (UTC)[reply]

References

  1. ^ Jenkins, Edward B. (21 January 2013). "THE FRACTIONAL IONIZATION OF THE WARM NEUTRAL INTERSTELLAR MEDIUM". The Astrophysical Journal. 764 (1): 25. doi:10.1088/0004-637X/764/1/25.
  2. ^ Caselli, P.; Walmsley, C. M.; Terzieva, R.; Herbst, Eric (20 May 1998). "The Ionization Fraction in Dense Cloud Cores". The Astrophysical Journal. 499 (1): 234–249. doi:10.1086/305624.
  3. ^ Oppenheimer, M.; Dalgarno, A. (August 1974). "The Fractional Ionization in Dense Interstellar Clouds". The Astrophysical Journal. 192: 29. doi:10.1086/153030.
  4. ^ Hezareh, Talayeh; Houde, Martin; McCoey, Carolyn; Vastel, Charlotte; Peng, Ruisheng (10 September 2008). "Simultaneous Determination of the Cosmic Ray Ionization Rate and Fractional Ionization in DR 21(OH)". The Astrophysical Journal. 684 (2): 1221–1227. doi:10.1086/590365.