Abstract
In this work, measured frequencies of neutral aluminium n2P1/2,3/2 → (n + 1)2P1/2,3/2, n2P1/2,3/2 → (n + 1)2S1/2 and n2P1/2,3/2 → n2D3/2,5/2 transitions in the range of principal quantum number n = 22–36 and frequency 81 to 281 GHz are presented, comprising 32 new two-photon resonances and 30 new single-photon resonances. The P-state fine-structure splittings have been determined. A comprehensive quantum-defect fit of these results, together with our earlier results in D, F and G Rydberg states of Al and accurate data of other researchers, has been carried out. This analysis provides a consistent set of Rydberg–Ritz quantum-defect constants for Al I in S, P, D, F and G states, including resolved P- and D-state fine structure (but no hyperfine structure) by means of which levels and transitions can be accurately calculated for any n ⩾ 7.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
