Experimental lifetimes of the 2p53s 1P1 and 3P1 levels in Ne-like sulfur and chlorine.

Abstract

Lifetimes of the 2${\mathit{p}}^{5}$3s $^{1}$${\mathit{P}}_{1}$ and $^{3}$${\mathit{P}}_{1}$ levels in Svii and Clviii have been measured using the beam-foil technique. The results are 17.4\ifmmode\pm\else\textpm\fi{}0.5 (13\ifmmode\pm\else\textpm\fi{}1) and 52\ifmmode\pm\else\textpm\fi{}2 (27\ifmmode\pm\else\textpm\fi{}1) ps for Svii (Clviii). Many theoretical results, obtained by a variety of methods, are available for these lifetimes. A summary of the theoretical lifetimes reveals a significant scatter of the results, and none of the calculations agrees with all the present experimental data.