Oganesson (Og, Z = 118): atomic energy levels
No energy level diagram can be drawn for neutral oganesson: no excited level of the atom has been measured, so there is no observed transition to show. This page lists what is known instead, and marks every calculated number as theory.
What has been measured
Nothing beyond nuclear decay properties: no atomic-physics measurement and no chemistry experiment (production rate about one atom per month).
| Quantity | Value | Source |
|---|---|---|
| Ground configuration | [Rn] 5f14 6d10 7s2 7p6 theory | B.G.C. Lackenby, V.A. Dzuba, V.V. Flambaum, Phys. Rev. A 98, 042512 (2018), arXiv:1809.02325v2, p. 2 Table I |
| Ground term | 1S0 theory | B.G.C. Lackenby, V.A. Dzuba, V.V. Flambaum, Phys. Rev. A 98, 042512 (2018), arXiv:1809.02325v2, p. 2 Table I |
| First ionisation energy | 8.888 ± 0.044 eV theory | Y. Guo, L.F. Pasteka, E. Eliav, A. Borschevsky, arXiv:2107.02164v2 (2021) (listed in the Smits et al. review as Adv. Quantum Chem. 83, 107 (2021)), p. 14 Table 5 |
| Longest-lived isotope | 294Og, half-life 0.7 ± 0.3 ms | NUBASE2020: F.G. Kondev, M. Wang, W.J. Huang, S. Naimi, G. Audi, Chin. Phys. C 45, 030001 (2021), machine-readable table nubase_4.mas20.txt, line for 294Og |
Calculated transitions from the ground state
Theory only: none of these lines has been observed. Wavelengths are converted from the calculated level energies.
| Lower level | Upper level | Energy (cm⁻¹) | λ vacuum (nm) | Type | A (s⁻¹) theory | Source |
|---|---|---|---|---|---|---|
| 7s2 7p6 1S0 (ground) | 7s2 7p5 8s 1P*1 | 36689 | 272.6 | E1 | 1.45e+08 | B.G.C. Lackenby, V.A. Dzuba, V.V. Flambaum, Phys. Rev. A 98, 042512 (2018), arXiv:1809.02325v2, p. 2 Table I (energy) and p. 4 Table III (rate) |
| 7s2 7p6 1S0 (ground) | 7s2 7p5 7d 1P*1 | 57855 | 172.8 | E1 | 9.36e+08 | B.G.C. Lackenby, V.A. Dzuba, V.V. Flambaum, Phys. Rev. A 98, 042512 (2018), arXiv:1809.02325v2, p. 2 Table I (energy) and p. 4 Table III (rate) |
| 7s2 7p6 1S0 (ground) | 7s2 7p5 7d, J=1 odd (printed 1S*1) | 54725 | 182.7 | E1 | 5.84e+07 | B.G.C. Lackenby, V.A. Dzuba, V.V. Flambaum, Phys. Rev. A 98, 042512 (2018), arXiv:1809.02325v2, p. 2 Table I (energy) and p. 4 Table III (rate) |