Energy-gain spectroscopy studies of electron capture from helium by slow multiply charged neon ions

Schmeissner, Chris M.; Cocke, C. L.; Mann, R.; Meyerhof, W. E.

doi:10.1103/physreva.30.1661

Cited by 62 publications

(11 citation statements)

References 22 publications

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“…Energy-gain spectroscopy has been established as a powerful technique to study the dynamics of charge exchange processes in mainly slow (up to 10 keV/nucleon) highly charged ion-atom collisions (Lorents and Aberth 1965, Ohtani et al 1982, Tsurubuchi et al 1982, Ohtani 1984, Tawara et al 1984, Schmeissner et al 1984, Barat et a! 1987, Barat and Roncin 1992.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional recoil-ion momentum analyses in 8.7 MeV O⁷⁺-He collisions

Kambara

Tang

Awaya

et al. 1995

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

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Using high-resolution recoil-ion momentum spectroscopy we have measured the differential cross sections of single-electron capture and target single-ionization processes for 8.7 MeV 07'-He collisions as functions of scattering angle. A transverse momentum molution of hO.2 a", which componds to an angular resolution of about I I .5 x rad for the projectile scattering angle, was obtained by intersecfing a well collimated 07+ beam with a target of 3. supersonic He jet from a pre-cooled gas and by measuring the recoil-ion transverse momentum. For the single capture reaction, information on the n-value of the eleclron final state in O"(lsn1) is oblained from the longiludinal momentum of the recoil ions. In pure singleelectron capture. the dominant contributions to capture were found to be thwe from the n = 4 and higher states. whereas single capture accompanied by lhe ionization of the second target electron mainly populates n = 2 lo n = 4 states. Furthermore, the measured VansverSe momentum distribution differs significantly between pure single capture and capture with simultaneous ionization, The measured data for the pure capture process compare favourably with thenretical results based on a molecular-state expansion method. Other experimental data are discussed in terms of the classical overbarrier model.

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Section: Introductionmentioning

confidence: 99%

Three-dimensional recoil-ion momentum analyses in 8.7 MeV O⁷⁺-He collisions

Kambara

Tang

Awaya

et al. 1995

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

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“…This transition is denoted monoelectronic in the following. At the outgoing part of 4 60-keVC + He The diagram shows a limited number of potential curves relevant for the production of configurations 2lnl' (n =3- 6).…”

Section: Introductionmentioning

confidence: 99%

Angular distribution of Auger-electron emission following double-electron capture inC6++He collisions

Frémont

Sommer²,

Lecler

et al. 1992

Phys. Rev. A

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Angular distributions of Auger electrons ejected in 60-keV C ++He collisions were measured. This study extends previous work where cross sections for the production of the configuration 2lnl' (n~3) have been determined from measurements at the observation angle of 0' only. For n =3 and 4, the present angular distributions were measured to be anisotropic, whereas for n = 5 and 6 the electron emissions were found to be isotropic within the experimental uncertainties. The integration over the observation angle yields total production cross sections 0. 2I"I that were found to follow an n law, in agreement with previous calculations. The observed angular distributions are discussed in terms of different capture mechanisms.PACS number(s): 32.80.Hd, 34.50.Fa

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“…Ces considerations (faibles sections efficaces d'excitation des niveaux n = 3 et 5) permettent de dire que la capture se fait selectivement sur les niveaux n = 4. Ce resultat est en accord avec les mesures de Iwai et al [6], Tawara et al [7], Justiniano et al [8], Bonnet et al [5], Schmeissner et al [10] et par les calculs sur le modele Landau-Zener de Kimura et al [9].…”

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