Lifetime measurements in theS122andD32,522sequences of indium

Abstract

Natural radiative lifetimes in the $5s^2\mathrm{ns}{}_{}{}^2{}_{}{}^{}S_{\frac{1}{2}}^{}{}_{}{}^{}$ and $5s^2\mathrm{nd}{}_{}{}^2{}_{}{}^{}D_{\frac{3}{2},\frac{5}{2}}^{}{}_{}{}^{}$ ($n\le 20$) sequences of indium have been measured using pulsed laser excitation of an atomic beam. The uv pulses were produced by a YAG-pumped, or alternatively, an excimer-pumped dye-laser system. While the $S$-state lifetimes show a normal ${\left(n^{*}\right)}^3$ behavior, the $D$ sequences are strongly perturbed. The lifetimes of the $5s5p^2{}_{}{}^4{}_{}{}^{}P$ states were found to be $J$ dependent.