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).
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All values are in inverse centimeters.
Hydrogenic term value; see Table VII of Ref. 14.
Contribution to polarization shift from dipole polarizability αd.
Contribution to polarization shift from quadrupole polarizability αq.
Adopted value for ionization energy is 11 188 200 ± 1000 cm−1.
Table 6
Comparison of Experimental and Calculated Values of the Ionization Energy of Sr27+
This work.
Calculated with Desclaux code, Ref. 16.
T. A. Carlson, C. W. Nestor Jr., N. Wasserman, and J. D. McDowell, At. Data Nucl. Data Tables 2, 63 (1970).
Edlén, Ref. 14.
Ivanov and Ivanova, Ref. 15. This result is not independent of Edlén’s extrapolated value inasmuch as the parameters for the model potential depend on Edlén’s extrapolated value for Mo31+.
All values are in inverse centimeters.
Hydrogenic term value; see Table VII of Ref. 14.
Contribution to polarization shift from dipole polarizability αd.
Contribution to polarization shift from quadrupole polarizability αq.
Adopted value for ionization energy is 11 188 200 ± 1000 cm−1.
Table 6
Comparison of Experimental and Calculated Values of the Ionization Energy of Sr27+
This work.
Calculated with Desclaux code, Ref. 16.
T. A. Carlson, C. W. Nestor Jr., N. Wasserman, and J. D. McDowell, At. Data Nucl. Data Tables 2, 63 (1970).
Edlén, Ref. 14.
Ivanov and Ivanova, Ref. 15. This result is not independent of Edlén’s extrapolated value inasmuch as the parameters for the model potential depend on Edlén’s extrapolated value for Mo31+.