The first direct radiative lifetime measurements in W I are described. Radiative lifetimes of 15 levels from the 5d⁴6s(a⁶D)6p(z⁷D⁰), 5d⁴6s(a⁶D)6p(z⁵F⁰), 5d⁵(a⁶S)6p(z⁷P⁰),, and 5d⁴6s(a⁶D)6p(z⁵P⁰) terms are reported with an accuracy of ±{}5%. The lifetimes are measured using time-resolved laser-induced fluorescence and a novel atomic-beam source. This novel hollow cathode effusive beam source produces an intense beam of ground-state W atoms and metastable W atoms.
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Duquette et al. (1981) studied this question.
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