Neon-20 ( neon twenty ) is a stable nuclide of the chemical element of neon with atomic number 10 and mass number 20. The isotopic abundance of neon-20 in nature is 90.48% [2] , the source of its origin on Earth has not yet been precisely determined. It was discovered by F. Aston in 1919 [3] .
| Neon 20 | |
|---|---|
| Name, symbol | Neon-20, 20 Ne |
| Neutrons | ten |
| Nuclide properties | |
| Atomic mass | 19,9924401754 (19) [1] a. eat. |
| Mass defect | −7 041.9313 (18) [1] to eV |
| Specific binding energy (per nucleon) | 8 032,240 (0) [1] keV |
| Isotopic abundance | 90.48 (3) [2] % |
| Half life | stable [2] |
| Parent isotopes | 20 F ( β - ) 20 Na ( β + ) 21 Mg (β + p) 22 Al (β + 2p) 235 U ( cluster decay ) |
| Spin and core parity | 0 + [2] |
Education
It is formed as a result of β - decay of a nuclide of 20 F (half-life of 11.163 (8) [2] s, the released energy is 7024.53 (8) [1] keV ) and β + decay of a nuclide of 20 Na (half-life of 447.9 ( 23) [2] ms, energy released 13890 (7) [1] keV ):
Neon-20 is also formed during β + p decay of 21 Mg nuclide (the probability of such decay is 32.6 (10)%) and when β + 2p decay of 22 Al nuclide (probability is 0.9 (5)%):
With a very low probability ( branching coefficient 8 (4) ⋅ 10 −10 %) is formed during the cluster decay of uranium-235 [2] :
See also
- Isotopes of neon
Notes
- ↑ 1 2 3 4 5 Audi G. , Wapstra AH , Thibault C. The AME2003 atomic mass evaluation (II). Tables, graphs, and references (Eng.) // Nuclear Physics A. - 2003. - Vol. 729 . - P. 337–676 . - DOI : 10.1016 / j.nuclphysa.2003.11.003 . - .
- ↑ 1 2 3 4 5 6 7 Audi G. , Bersillon O. , Blachot J. , Wapstra AH The NUBASE evaluation of nuclear and decay properties // Nuclear Physics A. - 2003 .-- T. 729 . - S. 3—128 . - DOI : 10.1016 / j.nuclphysa.2003.11.001 . - .
- ↑ Volkov V.A. et al. Prominent chemists of the world: Biographical reference book. - M .: Higher. school., 1991 .-- S. 22-23. - 656 p. - 100,000 copies. - ISBN 5-06-001568-8 .