Radiative lifetime measurements of odd-parity high-excited levels of Sn I by time-resolved laser spectroscopy

Natural radiative lifetimes of five higher-lying odd-parity levels5p7s ³P₁^o, 5p5d ¹P₁^o, 5p6d³F₂^o, ³D₁^o and ³F₃^o inneutral tin are measured by the time-resolved laser-inducedfluorescence (TR-LIF) technique and the atomic beam method. Allthese lifetimes are not longer than 100 ns and they are found to beshorter than the lifetimes of even-parity levels in the same energyregion. The results reported in this paper provide importanttransition parameters for highly-excited atomic Sn, which may be usefulfor theoretically calculating excited heavy atoms.