Ejected-electron spectra from the triplet states of O⁴⁺(1s²3l3l') produced by O⁶⁺+O₂collisions

Abstract

Ejected electrons from the tripla states of doubly excited 0 " ions, pmduced by 60 keV 06+ + 02 collisions, have been measured with high resolution mudegree elenmn spectroscopy. The niplet staies of doubly excited configumions are selectively produced lhmagh double electron transfer processes with the 0 2 molecular tnrget under single collision conditions.Electrons ejected from the ls'2pnl and ls'31nl' configurations are oberved over a wide energy range. Ejected-electron specha from the O4+(Is13131') are compared with theoretical calculations. The calculation of energy levels of ls'3131' states has been carried out by the Zexpansion method. where 2 is the nuclear charge. Correlation, relativistic and radiative efffm m t a k a into account. Electrons fmm triplet stltes are identified by comparison with ihe wlcularions and the 'singlet state' spectrum pmduced by 06++He collisions.

Doubly-Excited States of Beryllium-Like Ions

“…Table V also shows the result given by Nakamura et al [23] who used a procedure very similar to Vaeck and Hansen [18]. The di¡erence between Vaeck and Hansen [18] and Nakamura et al [23] is that second order correlation e¡ects were included in the wave function employed in the latter work [23]. In general, the widths reported in Refs.…”

“…In our present work, the continuum functions are included implicitly by using the ``nearlycompleted'' sets of products of STO. Table V also shows the result given by Nakamura et al [23] who used a procedure very similar to Vaeck and Hansen [18]. The di¡erence between Vaeck and Hansen [18] and Nakamura et al [23] is that second order correlation e¡ects were included in the wave function employed in the latter work [23].…”

Relativistic Energies and Auger Widths of High-Lying Doubly-Excited States 1 s 2 3 lnl ′ 1 D e in Be-Like O 4+ Ions

“…The 1/𝑍 perturbation theory method was used to calculate the energies and autoionization widths of the singlet and triplet 1𝑠 2 3𝑙𝑛𝑙 ′ (𝑛 = 3-4) states by Nakamura et a1. [3,8] These theoretical methods were often used for identification of ejected-electron spectra.…”