Competition between radiative and non-radiative decay processes in triply-excited 3131'nl" and doubly-excited 2lnl' states in nitrogen ions

Vaeck, Nathalie; Hansen, J.E.

doi:10.1088/0953-4075/25/15/009

Cited by 24 publications

(11 citation statements)

References 11 publications

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“…Theoretical investigations of multiply excited states are essentially absent except for the calculations of radiative and nonradiative decay rates in triply excited (3l, 31',nl") N4+ by Vaeck and Hansen [33].…”

Section: Resultsmentioning

confidence: 99%

Multielectron processes in 10-keV/uArq+(5≤q≤17) on Ar collisions

et al. 1994

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We have used time-of-flight coincidence techniques to study multielectron reactions in 10-keV/u (U=0.632 a.u.) Ar + (5 ( q ( 17) on Ar collisions. Absolute cross sections for total charge-transfer (o. ), Projectile charge-change (o. q q l, ), recoil Production (crq ), and Phenomenological cross sections (O. q qk) have been obtained by normalizing to cross sections reported in the literature [H. Klinger, A. Miiller, and E. Salzborn, J. Phys. B 8, 230 (1975)]. The data have been used to critically test the predictions of the molecular classical overbarrier model (MCBM) [A. Niehaus, J. Phys. B 19, 2925 (1986)] and rather impressive agreements have been obtained. In particular, the predictions of target outer-shell excitation seem to have supporting evidence in this set of data. A stabilization scheme for the multiply excited projectile following charge transfer is proposed to complement the MCBM predictions and the gross features of the Anal reaction products are fairly accounted for. In addition, enhanced electron loss from the projectile-target system is observed in hard collisions for low-charged projectiles (q 8) and is attributed to inner-shell excitation via molecular-orbital promotion.PACS number(s): 34.70.+e, 34.50.Fa

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Section: Resultsmentioning

confidence: 99%

Multielectron processes in 10-keV/uArq+(5≤q≤17) on Ar collisions

et al. 1994

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“…In this Letter, we point out that the decay properties of such states can be expected to be different from the familiar behavior of doubly excited series. This is important, for example, in trying to untangle the competition between radiative and nonradiative decay for such states [9,10].…”

Section: Department Of Physics and Astronomy University Of Amsterdammentioning

confidence: 99%

Autoionization of Triply Excited Rydberg Series

Verbockhaven

Hansen

2000

Phys. Rev. Lett.

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“…However, in the present context it is fortunate that the radiative decay rate for a transition 2pne -+ lsne is very large compared to the probability for autoionization when the Rydberg electron has a high n or e value. For 2pne states in et (van der Hart and Hansen 1993a) and in Ns+ (Vaeck and Hansen 1992) it has been found that the radiative decay rates are larger than the autoionization rates for all terms already for n less than 10 and generally the mixing between 2pne and 2sne' is so large in a two-electron atom, due to the degeneracy between the hydrogenic 2s and 2p states, that the same will apply to most 2ene' states. Similarly, for the 3ene' states the weight of the 3pne component in the eigenvector is often large enough to allow the direct decay to a Isne state.…”

Section: Radiative Decay Rates and Stabilization Ratiosmentioning

confidence: 99%

Radiative stabilization in double-electron capture to 4l4l' and 4l5l' states in O⁶⁺

Hart¹,

Vaeck²,

Hansen³

1994

J. Phys. B: At. Mol. Opt. Phys.

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Following slow collisions between Oat and AI, double-electron capture into 4 4 t ' and 45P states of 06t has been reported. The experimental results show that in 25% of the events the hvo electrons are retained on the oxygen presumably due 10 radiative stabilization. In order to understand this high rate of stabilization, we have calculated for the first time the decay properties of all the 4 t U ' and 4t5e' terms in the isolated atom using a truncated diagonalization method with 8-spline basis sets. The 4 t 4 ' states are Lying in the same range of energy as the higher members of the 3lnt' Rydberg series and we have extended our B-spline approach to represent accurately the 3lnt' states with n up to 50, In this static approach. we obtain 30.8% radiative stabilization for lhe 4C4t' manifold and 2.6% for the 4 W ' manifold assuming in both cases a statistical population of the states. We conclude that these values, when combined with the experimentally determined initial populations of the hvo configurations, are too small to explain the experimental features assuming a statistical population distribution and we propose that in order to clarify the situation an experimental andlor theoretical study of the population dishibution over the two configurations is necessary.

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Competition between radiative and non-radiative decay processes in triply-excited 3131'nl" and doubly-excited 2lnl' states in nitrogen ions

Cited by 24 publications

References 11 publications

Multielectron processes in 10-keV/uArq+(5≤q≤17) on Ar collisions

Multielectron processes in 10-keV/uArq+(5≤q≤17) on Ar collisions

Autoionization of Triply Excited Rydberg Series

Radiative stabilization in double-electron capture to 4l4l' and 4l5l' states in O⁶⁺

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Competition between radiative and non-radiative decay processes in triply-excited 3131'nl" and doubly-excited 2lnl' states in nitrogen ions

Cited by 24 publications

References 11 publications

Multielectron processes in 10-keV/uArq+(5≤q≤17) on Ar collisions

Multielectron processes in 10-keV/uArq+(5≤q≤17) on Ar collisions

Autoionization of Triply Excited Rydberg Series

Radiative stabilization in double-electron capture to 4l4l' and 4l5l' states in O6+

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Radiative stabilization in double-electron capture to 4l4l' and 4l5l' states in O⁶⁺