Abstract
Using laser spectroscopic techniques the natural radiative lifetimes of 4s2n1s2S and 4s2n2d2D states of neutral gallium have been measured forn1 = 6 to 11 andn2 = 4 to 9. These states, as well as previously measured4s2np2P states, have been investigated theoretically using multi-configuration Hartree-Fock calculations. Oscillator strengths to all lower-lying states have been calculated and theoretical lifetimes of the investigated states evaluated. The2D sequence is strongly influenced by the 4s4p22D perturber, and strong cancellation effects in the radiative decay are observed both theoretically and experimentally.
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