The ab initio quasirelativistic Hartree–Fock approximation was used to determine spectroscopic parameters for the multi-charged tungsten ions with an open 4p shell. The configuration interaction method based on the transformed radial orbitals was applied to include the electron-correlation effects. The relativistic effects were taken into account in the Breit–Pauli approximation for the quasirelativistic Hartree–Fock radial orbitals. The complete energy level spectra were calculated for the 4s²4p^N, 4s²4p^N–14d and 4s⁴p^N+1 configurations of the tungsten ions from W⁴³⁺ to W³⁸⁺.

Keywords: quasirelativistic approach, many-electron ions, energy levels, tungsten
PACS: 31.10.+Z, 31.15.ag, 32.70.Cs

VOLFRAMO JONŲ 4s²4p^N, 4s²4p^N–14d IR 4s4p^N+1 KONFIGŪRACIJŲ ENERGIJOS SPEKTRAI
Pavelas Bogdanovičius, Rasa Karpuškienė, Romualdas Kisielius
Teorinės fizikos ir astronomijos institutas, Vilnius, Lietuva

Taikant kvazireliatyvistinį Hartrio ir Foko artinį, ištirti volframo jonai nuo W³⁸⁺ iki W⁴³⁺. Atlikti skaičiavimai įtraukiant koreliacinius efektus konfigūracijų sąveikos artėjime, naudota transformuotų radialiųjų orbitalių bazė. Suskaičiuotos pagrindinių konfigūracijų 4s²4p^N bei sužadintų konfigūracijų 4s²4p^N–14d ir 4s4p^N+1 lygmenų energijos. Gauti rezultatai palyginti su esamais eksperimentiniais ir teoriniais duomenimis. Jonams W⁴²⁺, W⁴¹⁺, W⁴⁰⁺ ir W³⁸⁺ visi tiriamųjų konfigūracijų energijos lygmenų spektrai gauti pirmą kartą. Jonų W⁴³⁺ ir W³⁹⁺ energijos lygmenys nustatyti didesniu tikslumu, palyginti su kitų autorių duomenimis.

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