Darmstadtium (Ds, Z = 110): atomic energy levels
No energy level diagram can be drawn for neutral darmstadtium: 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 (Steinegger 2021: Mt, Ds and Rg 'have yet dodged a chemical assessment completely').
| Quantity | Value | Source |
|---|---|---|
| Ground configuration | [Rn] 5f14 6d8 7s2 theory | B.G.C. Lackenby, V.A. Dzuba, V.V. Flambaum, Phys. Rev. A 101, 012514 (2020), arXiv:1910.01414v1, p. 9 Table VIII |
| Ground term | 3F4 theory | B.G.C. Lackenby, V.A. Dzuba, V.V. Flambaum, Phys. Rev. A 101, 012514 (2020), arXiv:1910.01414v1, p. 9 Table VIII |
| First ionisation energy | 10.158 eV theory | B.G.C. Lackenby, V.A. Dzuba, V.V. Flambaum, Phys. Rev. A 101, 012514 (2020), arXiv:1910.01414v1, p. 9 Table VIII |
| Longest-lived isotope | 281Ds, half-life 14 ± 3 s | 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 281Ds |
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 |
|---|---|---|---|---|---|---|
| 6d8 7s2 3F4 (ground) | J=5 odd (state 2o5) | 40173 | 248.9 | E1 | 5.09e+07 | B.G.C. Lackenby, V.A. Dzuba, V.V. Flambaum, Phys. Rev. A 101, 012514 (2020), arXiv:1910.01414v1, p. 8 Table VII |
| 6d8 7s2 3F4 (ground) | J=4 odd (state 4o4) | 43915 | 227.7 | E1 | 2.22e+07 | B.G.C. Lackenby, V.A. Dzuba, V.V. Flambaum, Phys. Rev. A 101, 012514 (2020), arXiv:1910.01414v1, p. 8 Table VII |
| 6d8 7s2 3F4 (ground) | J=4 odd (state 2o4) | 34919 | 286.4 | E1 | 1.23e+07 | B.G.C. Lackenby, V.A. Dzuba, V.V. Flambaum, Phys. Rev. A 101, 012514 (2020), arXiv:1910.01414v1, p. 8 Table VII |