Studies of the collision-based Xe VI and Xe VII spectra

Abstract

Collision-based spectroscopy of a Xe qϩ (q ϭ 6, 7) beam with a target T (T ϭ Na, Ar) has been performed in the 35-800-nm wavelength region. Twenty-five new Xe VI lines and twenty-two new Xe VII lines were classified, twelve new energy levels of Xe VI and nine new energy levels of Xe VII were established, and one energy level of Xe VI was revised from the classified transitions. The analysis was supported by Hartree-Fock calculations.

REVISED AND EXTENDED ANALYSIS OF FIVE TIMES IONIZED XENON, Xe VI

“…Table 3 shows the set of 243 lines observed in our experiments, 146 of which were determined for the first time. Another 37 lines, from Larsson et al (1996), Wang et al (1996), and Wang et al (1997a), are shown with revised wavelengths as we measured them with a lower uncertainty. Observed line intensities given in this table are visual estimates of the blackening of the photographic plates.…”

“…a Uncertainty: New and revised wavelengths below 2100 Å: 0.02 Å; New and revised wavelengths above 2100 Å: 0.01 Å; Kaufman & Sugar (1987); Tauheed et al (1992); Churilov & Joshi (2000): 0.005 Å; Reyna Almandos et al 2001: 0.02 Å. b Hartree-Fock relativistic + core polarization: for 5s 2 nl − 5s 2 n 0 l 0 transitions α = 5.80a 0 3 ; for transitions involving unfilled 5s subshell, α = 0.993a 0 3 . c References: (1) Kaufman & Sugar 1987; (2) Tauheed et al 1992; (3) Larsson et al 1996;(4) Wang et al 1996;(5) Wang et al 1997a;(6) Wang et al 1997b…”

“…Later, Tauheed et al (1992) used triggered spark and beam-foil light sources to identify five Xe vi intercombination lines for the first time. Collision-based spectroscopy experiments were performed by Larsson et al (1996) and Wang et al (1996Wang et al ( , 1997aWang et al ( , 1997b to investigate the 5s 2 4f and N > 6 configurations of Xe vi at Uppsala University. Sarmiento et al (1999) performed the spectral analysis for the 5s5p5d, 5p 3 , and 5s5p6s configurations of Xe vi based on experiments conducted at the CIOp's laboratory, Argentina.…”

Extended analysis of Xe VII and Xe VIII

“…We adjusted the energy level values reported by Wang et al [25] (compiled by Saloman [38]) for 3 D 1,2,3 of 5s6d and 3 S 1 of 5s7s configurations. We reported new energy level values for 1 D 2 of 5s6d, 1 S 0 of 5s7s, 1 P 1 of 5s7p configurations and 7 new energy level values for 4d 9 5s 2 5p configuration of Xe VII spectrum.…”

“…Larsson et al [24] obtained energy levels of the 5s6s, 5s5d and 5p 2 , and 5s4f configurations by collision-based spectroscopy. Using the [25] extended Larsson's work to include the 5s(6p + 7p) and 5s(6d + 7s) configurations. The study of the 5p5d configuration by Cavalcanti et al using a theta-pinch as light source [26], by Gallardo et al, reporting fourteen new energy levels and one hundred and ten new lines using a pulsed discharge [27], was made.…”