Experimental branching fractions, transition probabilities, and oscillator strengths in La i

Abstract

The branching fraction (BF) determinations were performed for 87 La I lines from 290.963 nm to 1078.646 nm based on the emission spectra of hollow cathode lamps recorded using the 1.0 m Fourier transform spectrometer (FTS) and are available from the digital library of National Solar Observatory on Kitt Peak, USA (http://diglib.nso.edu/). Furthermore, by combining the determined BFs with reliable lifetime values reported in literature, the transition probabilities and absolute oscillator strengths for these lines were derived.

Experimental Branching Fractions, Transition Probabilities, and Oscillator Strengths in Sm ii

“…In the period from 1975 to now, radiative lifetimes were measured using the beam-foil technique, delayed-coincidence technique, beam-laser technique, time-resolved laser-induced fluorescence (TR-LIF) technique, and other techniques (Andersen et al 1975;Blagoev et al 1978;Vogel et al 1988;Biémont et al 1989;Scholl et al 2002;Xu et al 2003;Lawler et al 2006;Zhang et al 2011). Among these, TR-LIF is regarded as the most reliable technique (Wang et al 2021). For BFs, the most frequently used method is analyzing the emission spectrum from a hollow-cathode lamp (Saffman & Whaling 1979;Lawler et al 2006).…”