4s/sup 2/4p/sup 3/--4s4p/sup 4/ and 4s/sup 2/4p/sup 3/--4s/sup 2/fp/sup 2/5s transitions in Y VII, Zr VIII, Nb IX, and MoX
Journal Article
·
· J. Opt. Soc. Am.; (United States)
Spectra of ionized Y, Zr, Nb, and Mo have been observed in sliding-spark and triggered-spark discharges on 10.7-m normal- and grazing-incidence spectrographs at the National Bureau of Standards in Washington, D. C. From these observations the 4s/sup 2/4p/sup 3/--4s4p/sup 4/ transitions in Y VII, Zr VIII, Nb IX, and Mo X have been identified. The 4s/sup 2/4p/sup 3/--4s/sup 2/4p/sup 2/5s transitions in Y VII-Mo X, previously identified by Rahimullah et al. (Phys. Scr. 14, 221--223 (1976); 18, 96--106 (1978)), have been confirmed. In Y VII the 4s/sup 2/4p/sup 3/--4s/sup 2/4p/sup 2/6s and 4s4p/sup 4/--4p/sup 5/ transition also have been found. The parameters obtained from least-squares fits to the energy levels are compared with Hartree--Fock calculations. Preliminary values of the ionization energies have been determined as 110.02 +- 0.15 eV for Y VII, 133.7 +- 0.5 eV for Zr VIII, 159.2 +- 0.7 eV for Nb IX, and 186.4 +- 1.2 eV for Mo X.
- Research Organization:
- National Bureau of Standards, Washington, D.C. 20234
- OSTI ID:
- 6450927
- Journal Information:
- J. Opt. Soc. Am.; (United States), Journal Name: J. Opt. Soc. Am.; (United States) Vol. 71:4; ISSN JOSAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104 -- Spectral Procedures-- (-1987)
ATOMS
CHARGED PARTICLES
ENERGY-LEVEL TRANSITIONS
HARTREE-FOCK METHOD
IONS
ISOELECTRONIC ATOMS
LEAST SQUARE FIT
MAXIMUM-LIKELIHOOD FIT
MOLYBDENUM IONS
NIOBIUM IONS
NUMERICAL SOLUTION
YTTRIUM IONS
ZIRCONIUM IONS
360104* -- Metals & Alloys-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104 -- Spectral Procedures-- (-1987)
ATOMS
CHARGED PARTICLES
ENERGY-LEVEL TRANSITIONS
HARTREE-FOCK METHOD
IONS
ISOELECTRONIC ATOMS
LEAST SQUARE FIT
MAXIMUM-LIKELIHOOD FIT
MOLYBDENUM IONS
NIOBIUM IONS
NUMERICAL SOLUTION
YTTRIUM IONS
ZIRCONIUM IONS