Doppler-limited high resolution laser optogalvanic spectra of six transitions of rhenium lying in the range 560–620 nm have been recorded. Isotope shifts between the two natural isotopes of rhenium,185Re and187Re, have been calculated in all the six transitions. Hyperfine coupling constants for eight levels belonging to the configurations 5d56s2, 5d66s, 5d46s26p and 5d56s6p are reported. Wherever possible our constants are compared with those given by others.
Volume 94, 2020
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