EXTENDED ANALYSIS OF 3-TIMES IONIZED KRYPTON (KR-IV)

The spectral analysis of three-times ionized krypton, Kr IV, was exten ded to include 3, 12, 7, 8 and 20 new level values of the configuratio ns 4s(2)4p(2)5s, 4s(2)4p(2)4d, 4s(2)4p(2)6s, 4s(2)4p(2)5d and 4s(2)4p( 2)5p, respectively. Five known level values of the even configurations were redesignated and four levels were rejected. The observed configu rations were interpreted theoretically by means of Hartree-Fock relati vistic (HFR) calculations and a least-squares fit of the energy parame ters to the observed levels. Rydberg series configuration interactions have also been included in the calculations.