Energy-level and lifetime measurements for Kr VII

We present values for the energies of the $4s4p\hspace{0.17em}{{}^{3}P}_{0,1,2}^{\circ }$, the 4p^{2 3}P_0,1,2 and ¹P₁ and the 4s4d³D_1,2,3 and ¹D₂ levels in Kr vii. Lifetimes have been measured for the $4s4p\hspace{0.17em}{{}^{1}P}_1^{\circ }$, 4s4d, and 4p^{2 1}D₂ and the $4s4p\hspace{0.17em}{{}^{3}P}_1^{\circ }$ levels. In the case of the $4s4p\hspace{0.17em}{{}^{1}P}_1^{\circ }$ 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.