Abstract
In the present work, the experimentally determined oscillator strengths of the 3p P2→nd D2 (16≤n≤43) Rydberg transitions of lithium have been reported for the first time. The experiments were performed using two dye lasers simultaneously pumped by the second harmonic (532 nm) of an Nd:YAG laser, and the vapor containment and detection system was a thermionic diode ion detector. The first frequency-doubled dye laser excites the ground-state atoms to the 3p P2 excited state at 325.35 nm, and the second dye laser was scanned up to the first ionization threshold. The f-values of the aforementioned transitions have been determined using the threshold value of the photoionization cross section (30±4.8 Mb) from the 3p P2 excited state. A complete picture of the oscillator strengths from n=3 to 43 has been presented, including the previously known oscillator strength and determined in this work.
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