Jan Olof Ekberg, Jørgen E. Hansen, and Joseph Reader, "Analysis of the Spectrum of Five-Times-Ionized Zirconium (Zr vi)," J. Opt. Soc. Am. 62, 1134-1139 (1972)
The spectrum of Zr vi has been observed in a sliding-spark discharge with a 5-m grazing-incidence spectrograph. The analysis has yielded nearly all levels of the 4p44d configuration that can combine with the 4p52P ground term. All of the 4p45s levels as given by Chaghtai were confirmed. The 4s24p44d+4s24p45s+4s4p6 level structure has been theoretically interpreted, with configuration-interaction effects included. The
level was found to have a 24% 4s24p4(1D)4d2S character and the
level a 21% 4s4p6 2S character. The energy parameters determined from a least-squares fit to the observed level values are compared with Hartree–Fock (HF) calculations. The ionization energy is estimated to be 95.8±0.6 eV.
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PR—established by Paul and Rense, Ref. 1. MC—established by Chaghtai, Ref. 2.
Not observed in present work, level value taken from Paul and Rense, Ref. 1.
Table III
Calculated energy-level values in cm−1 and percentage compositions for the 4s4p6, 4s24p44d, and 4s24p45s configurations of Zr vi. The 4p44d states are denoted by (S1L1)SL notation; the states of 4p45s are denoted by (S1L1J1,j) notation.
The values in parentheses are a measure of the amount of cancellation that has occurred in forming the integral. These numbers are the ratio of the true Rk value to an Rk value calculated by using the absolute value of each wave function.
Table V
Effective quantum numbers n*(5s) for various alkali-like, rare-gas-like, and halogen-like ions. For Cr vi, V vi, and Ti vi, the values are for n*(4s).
Alkali
Rare gas
Halogen
Cr vi
2.803
V vi
2.857
Ti vi
2.901
Rb i
1.805
Kr i
1.835
Br i
1.864
Sr ii
2.221
Rb ii
2.257
Kr ii
2.303
Y iii
2.500
Sr iii
2.554
Rb iii
(2.61±0.02)
Zr iv
2.709
Y iv
2.761
Sr iv
(2.81±0.02)
Nb v
2.876
Zr v
2.926
Y v
(2.98±0.02)
Mo vi
3.013
Nb vi
3.063
Zr vi
(3.12±0.02)
Mo vii
3.178
Nb vii
(3.23±0.02)
Mo viii
(3.32±0.02)
Tables (5)
Table I
Classified lines of Zr vi. Intensities are visual estimates of photographic blackening.
PR—established by Paul and Rense, Ref. 1. MC—established by Chaghtai, Ref. 2.
Not observed in present work, level value taken from Paul and Rense, Ref. 1.
Table III
Calculated energy-level values in cm−1 and percentage compositions for the 4s4p6, 4s24p44d, and 4s24p45s configurations of Zr vi. The 4p44d states are denoted by (S1L1)SL notation; the states of 4p45s are denoted by (S1L1J1,j) notation.
The values in parentheses are a measure of the amount of cancellation that has occurred in forming the integral. These numbers are the ratio of the true Rk value to an Rk value calculated by using the absolute value of each wave function.
Table V
Effective quantum numbers n*(5s) for various alkali-like, rare-gas-like, and halogen-like ions. For Cr vi, V vi, and Ti vi, the values are for n*(4s).