Energy-level and lifetime measurements for Kr VII

Abstract

We present values for the energies of the 4s4p P30,1,2∘, the 4p2 3P0,1,2 and 1P1 and the 4s4d3D1,2,3 and 1D2 levels in Kr vii. Lifetimes have been measured for the 4s4p P11∘, 4s4d, and 4p2 1D2 and the 4s4p P31∘ levels. In the case of the 4s4p P11∘ level, a variety of methods to correct for cascading is discussed, including the technique of arbitrarily normalized decay curves, which yields an f value for the Kr vii resonance transition of 1.53 ± 0.15, in good agreement with theory.