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Isotopes of radon

There are 39 known isotopes of radon (86Rn), from 193Rn to 231Rn; all are radioactive. The most stable isotope is 222Rn with a half-life of 3.823 days, which decays into 218
Po
. Six isotopes of radon, 217, 218, 219, 220, 221, 222Rn, occur in trace quantities in nature as decay products of, respectively, 217At, 218At, 223Ra, 224Ra, 225Ra, and 226Ra. 217Rn and 221Rn are produced in rare branches in the decay chain of trace quantities of 237Np; 222Rn (and also 218Rn in a rare branch) is an intermediate step in the decay chain of 238U;[2] 219Rn is an intermediate step in the decay chain of 235U; and 220Rn occurs in the decay chain of 232Th.

List of isotopes

  1. ^ mRn – Excited nuclear isomer.
  2. ^ ( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
  3. ^ # – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
  4. ^ ( ) spin value – Indicates spin with weak assignment arguments.
  5. ^ a b # – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
  6. ^ Theoretically capable of electron capture to 213At[5]
  7. ^ a b Intermediate decay product of 237Np
  8. ^ a b Intermediate decay product of 238U
  9. ^ Intermediate decay product of 235U
  10. ^ Theorized to also undergo β−β− dacay to 220Ra
  11. ^ Intermediate decay product of 232Th
  12. ^ Source of element's name
  13. ^ Theorized to also undergo β−β− decay to 222Ra

References

  1. ^ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
  2. ^ "Decay Chain".
  3. ^ a b Andreyev, A. N.; Antalic, S.; Huyse, M.; Duppen, P. Van; Ackermann, D.; Bianco, L.; Cullen, D. M.; Darby, I. G.; Franchoo, S.; Heinz, S.; Heßberger, F. P.; Hofmann, S.; Kojouharov, I.; Kindler, B.; Leppänen, A.-P.; Lommel, B.; Mann, R.; Münzenberg, G.; Pakarinen, J.; Page, R. D.; Ressler, J. J.; Saro, S.; Streicher, B.; Sulignano, B.; Thomson, J.; Wyss, R. (6 December 2006). "α decay of the new isotopes 193,194Rn". Physical Review C. 74 (6): 064303. doi:10.1103/PhysRevC.74.064303. ISSN 0556-2813.
  4. ^ a b Kettunen, H.; Uusitalo, J.; Leino, M.; Jones, P.; Eskola, K.; Greenlees, P. T.; Helariutta, K.; Julin, R.; Juutinen, S.; Kankaanpää, H.; Kuusiniemi, P.; Muikku, M.; Nieminen, P.; Rahkila, P. (16 March 2001). "α decay studies of the nuclides 195Rn and 196Rn". Physical Review C. 63 (4): 044315. Bibcode:2001PhRvC..63d4315K. doi:10.1103/PhysRevC.63.044315. ISSN 0556-2813. Retrieved 11 June 2023.
  5. ^ https://www.nndc.bnl.gov/ensnds/213/Rn/adopted.pdf, NNDC Chart of Nuclides, Adopted Levels for 213Rn.
  6. ^ Neidherr, D.; Audi, G.; Beck, D.; Baum, K.; Böhm, Ch.; Breitenfeldt, M.; Cakirli, R. B.; Casten, R. F.; George, S.; Herfurth, F.; Herlert, A.; Kellerbauer, A.; Kowalska, M.; Lunney, D.; Minaya-Ramirez, E.; Naimi, S.; Noah, E.; Penescu, L.; Rosenbusch, M.; Schwarz, S.; Schweikhard, L.; Stora, T. (19 March 2009). "Discovery of 229Rn and the Structure of the Heaviest Rn and Ra Isotopes from Penning-Trap Mass Measurements" (PDF). Physical Review Letters. 102 (11): 112501–1–112501–5. Bibcode:2009PhRvL.102k2501N. doi:10.1103/PhysRevLett.102.112501. PMID 19392194.
  7. ^ "Nudat 2". Archived from the original on 2020-08-02. Retrieved 2019-04-22.
  8. ^ [1] Archived 2020-08-02 at the Wayback Machine"