Tennessine (Ts, Z = 117): atomic energy levels
No energy level diagram can be drawn for neutral tennessine: 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 (Yakushev et al. 2024 name Lv and Ts as targets of future chemical research).
| Quantity | Value | Source |
|---|---|---|
| Ground configuration | [Rn] 5f14 6d10 7s2 7p5 theory | V.A. Dzuba, V.V. Flambaum, G.K. Vong, Phys. Rev. A 112, 012822 (2025), arXiv:2505.22895v2, p. 6 |
| Ground term | 2P°3/2 theory | V.A. Dzuba, V.V. Flambaum, G.K. Vong, Phys. Rev. A 112, 012822 (2025), arXiv:2505.22895v2, p. 6 |
| First ionisation energy | 7.643 eV theory | V.A. Dzuba, V.V. Flambaum, G.K. Vong, Phys. Rev. A 112, 012822 (2025), arXiv:2505.22895v2, p. 7 Table VIII |
| Longest-lived isotope | 294Ts, half-life 70 ± 30 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 294Ts |
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 |
|---|---|---|---|---|---|---|
| 7p5 2P*3/2 (ground) | 7p4 8s 2[2]3/2 | 31208 | 320.4 | E1 | – | V.A. Dzuba, V.V. Flambaum, G.K. Vong, Phys. Rev. A 112, 012822 (2025), arXiv:2505.22895v2, p. 6 Tables V-VII |
| 7p5 2P*3/2 (ground) | 7p4 8s 2[0]1/2 | 38506 | 259.7 | E1 | – | V.A. Dzuba, V.V. Flambaum, G.K. Vong, Phys. Rev. A 112, 012822 (2025), arXiv:2505.22895v2, p. 6 Tables V-VII |
| 7p5 2P*3/2 (ground) | 7p4 8s 2[2]5/2 | 27658 | 361.6 | E1 | – | V.A. Dzuba, V.V. Flambaum, G.K. Vong, Phys. Rev. A 112, 012822 (2025), arXiv:2505.22895v2, p. 6 Tables V-VII |