Abstract

The spectrum of Sr27+ was observed with a laser-produced plasma and a 2.2-m grazing-incidence spectrograph in the region 12–160 Å. From the identification of 37 lines, a system of 27 energy levels of the type 2p6nl was determined. The level system includes the configurations ns(n = 3 − 5), np(n = 3 − 6), nd(n = 3 − 7), nf(n = 4 − 6), and 5g. The ionization energy is determined as 11 188 200 ± 1000 cm−1 (1387.16 ± 0.12 eV).

© 1986 Optical Society of America

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