Radiative lifetimes of some energy levels of singly ionized neon

Experimental lifetimes of some levels of Ne ii

“…The instrumental resolution of their apparatus was 3 ns and therefore they could give for the first two states only an upper limit whereas in the present work the instrumental resolution is slightly better (2.4 ns) and therefore reliable data can be extracted for their two states. The experimental results of Fink et al [3] and Coetzer et al [5] obtained through beam-foil technique agree well with the [4] for the 3d 2 F 7/2 and 3d 2 F 7/2 levels are longer than the present results whereas for the 4s 4 P 5/2 level the lifetime value of Hesser [6] obtained through phase shift technique is almost half of the present value.…”

“…The calculations were done using a semiemperical method in intermediate coupling by Hodges et al [13] and Loginov and Gruzdev [14], and LS coupling by Coetzer et al [5] and Martin and Campos [15]. For the 3d 2 D 3/2 , 3d 2 D 5/2 , 3d 2 F 5/2 , 4s 2 D 3/2 and 4s 2 D 5/2 levels our results differ greatly from theoretical values.…”

“…The only known experimental data for the 4s 2 D 3/2 and 4s 2 D 5/2 levels are given by Blagoev and Stankova [2] who used delayed coincidence technique. Some of the 3d levels were also measured by Fink et al [3], Denis [4] and Coetzer et al [5], employing the beam-foil technique. Hesser [6] also measured lifetime of 4s 4 P 5/2 level using the phase-shift technique.…”