Radiative liferimes in O II obtained from beam-foil experiments

Abstract

Detailed measurements on the 3p' 2F~ and 3 d' 2G levels in O II are reported. The most prominent cascades that repopulate these levels are explicitly included in the analysis through the application of the ANDC (Arbitrarily Normalized Decay Curve) method. The results are compared with theoretical calculations and also measurements performed by other workers.

Theoretical lifetimes for certain O II levels

“…The 3s was obtained by freezing the rest of the orbitals and performing an AL calculation on all odd relativistic configurations generated from the non-relativistic configurations 2p 3 , 2p 2 3p and 2s 1 2p 3 3s. Finally, the 3d was obtained by freezing the rest of the orbitals and performing an AL calculation on all odd relativistic configurations generated from the non-relativistic [20] Beam-foil, curve fitting b [21] Beam-foil, curve fitting c [22] Beam-foil, curve fitting d [23] Ion beam with a gas target, curve fitting e [24] Beam-foil f [25] Beam-foil, curve fitting g [26] Beam-foil h [27] Beam gas method, curve fitting i [28] Beam-foil, cascade effects suppressed experimentally j [29] Beam-foil j1 [29] Beam-foil, corrected for cascading k [30] Beam-foil, curve fitting l [31] Beam-foil, ANDC analysis l1 [31] Beam-foil, curve fitting m [32] Beam-foil, ANDC analysis n [33] Beam-foil, curve fitting configurations 2p 3 , 2p 2 3p , 2s 1 2p 3 3s and 2s 1 2p 3 3d. Freezing of orbitals at each step of this procedure has been adopted, since the AL calculations were performed on levels differing widely in energies.…”