Antimony energy level diagram

Energy levels and transitions of neutral antimony (Sb I): the 82 strongest classified lines below 2 µm from the NIST Atomic Spectra Database and the 42 levels they connect, each line with its vacuum wavelength, frequency and, for 76 of them, the reduced dipole matrix element derived from the NIST transition rate. Measured lifetimes, transition rates, hyperfine constants and isotope shifts from the literature are included, each with its citation.

Hover a line or a level to isolate it, click to keep it selected. Scroll to zoom, drag to move.

Download: diagram (PDF) diagram (SVG) transitions (CSV) levels (CSV) source code

Key transitions of antimony

λ, ν from NIST level energies unless a measured frequency for this isotope is available. A: measured value or NIST. Γ/2π: natural linewidth of the upper level, 1/(2πτ).

¹²¹Sb hyperfine structure (I = 5/2)

Measured A, B constants; sources in the data file.

Closed and nearly closed transitions of antimony

A transition is closed when its upper level can decay only to the level it was excited from, so the atom keeps scattering photons. “closed”: among the levels NIST lists, no other level below the upper level has the opposite parity and |ΔJ| ≤ 1, so no other electric-dipole decay exists. Otherwise the leak is the sum of the branching ratios of the other decay lines of the upper level (or 1 − branching ratio where that of the line itself has been measured), and the number of photons is 1 / leak. “≥” and “≤”: at least one possible decay path has no listed rate, so the leak is a lower limit. These numbers are derived from the branching ratios, lifetimes and rates of this page, not measured as such; the tag names the weakest of the inputs, * marks theory and ≈ a model or semi-empirical calculation. Listed: lines that start on the ground level or on a metastable level and leak at most 10 %, unless more than three possible decay paths have no listed rate. Fine-structure levels only: hyperfine and Zeeman dark states and forbidden decays without a listed rate are not considered. Select a line in the diagram for the full list of its leak channels.

Listed Sb transitions below 2 µm

Reduced dipole matrix elements follow the convention A = ω³|d|²/(3πε₀ħc³(2J′+1)), with J′ the upper level. Tags show where a number comes from: measured, NIST compilation, high-accuracy theory, this site's own Cowan-code calculation with the parameters fitted to the NIST energies (HFR fit; inputs and fit report in the repository folder cowan/; used only where nothing else gives a rate; strong lines typically within a factor 2, weak lines worse), or a model calculation.

Sb energy levels

Sb⁺ ionisation limit 69431.34 cm⁻¹ = 8.60839 eV (144.027 nm)

Sources

• Andersen, Worre Jørgensen, Sørensen, J. Opt. Soc. Am. 64, 891 (1974) (beam-foil), as quot…
• Fernando, Rochester, Spalding, Smith, Phil. Mag. 5, 1291 (1960) (atomic-beam magnetic res…
• Hartman, Nilsson, Engström, Lundberg, Palmeri, Quinet, Biémont, Phys. Rev. A 82, 052512 (…
• Hartman, Nilsson, Engström, Lundberg, Palmeri, Quinet, Biémont, Phys. Rev. A 82, 052512 (…
• Hassini, Ben Ahmed, Robaux, Vergès, Wyart, J. Opt. Soc. Am. B 5, 2060 (1988) (Fourier-tra…
• Lechner et al., "Electromagnetic moments of the antimony isotopes 112-133Sb", arXiv:2311.…
• Liu, Yu, Suo, Liu, Sahoo, "Investigating properties of heavy and superheavy atomic system…
• NIST ASD
• NIST ASD level energies
• Osherovich, Tezikov, Opt. Spectrosc. 43, 612 (1977) (delayed coincidence), as quoted in T…
• Tezikov, Opt. Spectrosc. 44, 121 (1978) (delayed coincidence), as quoted in Table II of H…
• This site: Cowan-code HFR calculation of Sb I with the parameters fitted to the NIST ener…

All transition A_s and branching values are CALCULATED (MCDHF, Hartman et al. 2010, Table III) and marked method 'theory'; they are not measurements. Rows flagged in the paper as affected by convergence problems (upper levels 5d 4P1/2, 4D1/2, 4D5/2) were left out. Lifetimes with method 'experiment' are the laser measurements of Hartman et al.; those with method 'compilation' are older beam-foil / delayed-coincidence values read in Hartman's Table II (originals not opened). Hyperfine constants of the 5p3 2D, 2P levels are for 121Sb and are second-hand (read in Liu et al. 2023, units MHz as printed there). Wavelengths in labels are those printed by Hartman et al. (air above 200 nm, vacuum below). Lechner et al. give A and B for both hyperfine-split levels of the 217.6 nm line for 112-133Sb; only the stable isotopes are recorded here.

Atoms with measured data

• Lithium-632 levels, 85 lines
• Lithium-732 levels, 85 lines
• Beryllium-917 levels, 26 lines
• Sodium-2336 levels, 106 lines
• Magnesium-2418 levels, 61 lines
• Magnesium-2518 levels, 61 lines
• Potassium-3934 levels, 84 lines
• Potassium-4034 levels, 84 lines
• Potassium-4134 levels, 84 lines
• Calcium-4035 levels, 61 lines
• Calcium-4335 levels, 61 lines
• Chromium-5256 levels, 87 lines
• Chromium-5356 levels, 87 lines
• Rubidium-8536 levels, 94 lines
• Rubidium-8736 levels, 94 lines
• Strontium-8440 levels, 70 lines
• Strontium-8640 levels, 70 lines
• Strontium-8740 levels, 70 lines
• Strontium-8840 levels, 70 lines
• Cadmium-11115 levels, 21 lines
• Cadmium-11315 levels, 21 lines
• Cadmium-11415 levels, 21 lines
• Caesium-13331 levels, 79 lines
• Barium-13744 levels, 89 lines
• Barium-13844 levels, 89 lines
• Dysprosium-16139 levels, 55 lines
• Dysprosium-16239 levels, 55 lines
• Dysprosium-16339 levels, 55 lines
• Dysprosium-16439 levels, 55 lines
• Erbium-16673 levels, 90 lines
• Erbium-16773 levels, 90 lines
• Erbium-16873 levels, 90 lines
• Thulium-16972 levels, 73 lines
• Ytterbium-17118 levels, 26 lines
• Ytterbium-17318 levels, 26 lines
• Ytterbium-17418 levels, 26 lines
• Mercury-19927 levels, 47 lines
• Mercury-20127 levels, 47 lines
• Mercury-20227 levels, 47 lines

All elements: periodic table