Radiative lifetimes of some excited Xe II states

Lifetimes and transition probabilities of Xe II: Experimental measurements and theoretical calculations

“…Moreover, the line with a wavenumber of 139 094 cm −1 is observed in the VUV spectra [1] and because the transition probability depends on σ 3 , that line determines basically the lifetime. (2) 146 305 cm −1 , the LSF value is very low whereas AI values are in near accordance with the measurements of Fonseca et al (3) 153 585 cm −1 , the restricted set produce values greater than the extended set; because that line is present in VUV spectra [1], we think that the calculations with many configurations is more reliable, (4) 154 032 cm −1 , the use of many configurations produces a result in accordance with the experiment whereas the restricted set produces very low values, (5) 148 085 cm −1 , the low values obtained with all calculations are in accordance with the value of Blagoev et al [9] (< 3 ns).…”

“…The τ 's of 15 levels belonging to the 6p, 6d and 7s configurations were measured by a delayed coincidence method by Fonseca et al [8]; their values were compared with six experimental and two theoretical works. The τ 's for eighteen levels of configurations 6d, 6d' and 7s were published by Blagoev et al [9] These values are particularly interesting for our present work because several lifetimes are in strong disagreement with other values to be mentioned below.…”

Experimental lifetimes of some levels belonging to the 5p46dconfiguration of Xe II

“…In the present work we have employed the high frequency deflection technique together with a delayed coincidence single photon counting arrangement. The experimental setup is similar to that used in a previous investigation [5]. A pulsed beam of high energy electrons (4 keV) is used to excite the atoms to the levels of interest, the dc beam current being 1 mA.…”