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

Abstract

Natural radiative lifetimes of five higher-lying odd-parity levels 5p7s 3Po1, 5p5d 3Po1, 5p6d 3Fo1, 3Do1 and 3Fo3 in neutral tin are measured by the time-resolved laser-induced fluorescence (TR-LIF) technique and the atomic beam method. All these lifetimes are not longer than 100 ns and they are found to be shorter than the lifetimes of even-parity levels in the same energy region. The results reported in this paper provide important transition parameters for highly-excited atomic Sn, which may be useful for theoretically calculating excited heavy atoms.