Abstract
The spectrum of the kryptonlike ion Mo vii was observed from 140 to 2274 A with sliding-spark discharges on 10.7-m normal- and grazing-incidence spectrographs. Experimental energies were determined for all levels of the 4s24p6, 4s24p54d, 4f, 5s, 5p, 5d, 5f, 5g, and 4s4p64d configurations. A few levels of the 4s24p44 4d2 configuration were also found. A total of 399 lines were classified as transitions between 86 observed levels. The observed configurations were theoretically interpreted. The energy parameters determined by least-squares fits to the observed levels are compared with Hartree–Fock calculations. A revised value of the ionization energy was obtained by using the energy of the 4p55g configuration together with an isoelectronically extrapolated value of the effective quantum number n*(5g). The adopted limit is 1 013 340 ± 200 cm−1 (125.64 ± 0.02 eV).
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