Measurement of the lifetime of the 23P2state in heliumlike krypton using a two-foil target

The lifetime of the 2 $^{3}$${\mathit{P}}_{2}$ level in heliumlike krypton has been measured by an alternative method involving the use of a two-foil target. The experiment demonstrates the potential of this method which allows the standard beam-foil time-of-flight technique to be extended to shorter lifetimes. We measured a lifetime of 9.5\ifmmode\pm\else\textpm\fi{}0.9 ps, which is in reasonable agreement with current theoretical calculations.