Ejected electron spectra from highly excited states in high-energy collisions of O q+ with He

Kawatsura, K.; Kondo, Takahiro; Imai, Makoto; Sataka, M.; Komaki, K.; Shibata, Hiromi

doi:10.1016/s0168-583x(02)02056-6

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…As the detailed description of the experimental apparatus has been presented previously [7]- [12], only some major parameters are given here. A beam of 80 MeV (2.0 MeV/u) Ar 6+ ion was obtained from the tandem accelerator using the terminal ECR ion source [13].…”

Section: Methodsmentioning

confidence: 99%

“…We have been studying the electron emission mechanisms from various ions with different energies passing through gas and solid targets with zero-degree electron spectroscopy [7]- [12]. As for solid target, we have studied S and Si projectile ions, to prove that the decays of 3-5 electron systems give a significant contribution in the electron spectrum for 2.0 MeV/u S 12+ ion penetrating through a 2.2 µg/cm 2 carbon foil [7], [10], and so do those of 4-5 electron system in 2.0 MeV/u Si 5+ ion through a 9.6 µg/cm 2 carbon foil target [8] by using C-K electron energies calculated by perturbation theory of Z-expansion method (MZ code).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High resolution zero degree electron spectroscopy of argon ions through carbon foil

Imai¹,

Sataka²,

Kawatsura³

et al. 2006

Braz. J. Phys.

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Electrons emitted from high Rydberg states formed by penetration of 2.0 MeV/u Ar 6,13,14,15+ ions through C-foil targets of various thicknesses (4.0 -20 µg/cm 2 ) have been measured with high resolution utilizing zero-degree electron spectroscopy. Intense series of Coster-Kronig peaks due to Ar 14+ 1s 2 2p( 2 P 3/2,1/2 )nl1s 2 2s( 2 S 1/2 )εl and Ar 13+ 1s 2 2s2p( 3 P 2,1,0 )nl -1s 2 2s 2 ( 1 S 0 )εl transitions, in which the principal quantum number, n, starts at 10 and increases with increasing peak energy, have been observed for every combination of initial charge state and foil thickness, and quite a few number of other peaks remain unassigned in the electron energy region investigated. Intensities of each series of Coster-Kronig electron peaks follow the n −3 law. The mean charge states after the foil penetration have been found to be the same within 10% uncertainty and the total intensity of the Coster-Kronig transitions including Ar 15+ 1s 2 2p( 2 P) and Ar 14+ 1s 2 2s2p( 3 P) cores have also been found to remain constant for all the collision systems investigated. The total Ar 15+ 1s 2 2p( 2 P) population derived from n = 10 transition peaks is found to be almost the same as those of Ar 14+ 1s 2 2s2p( 3 P), which is in contrast to the ratio of Ar 15+ to Ar 14+ fractions measured downstream the foil.

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Section: Methodsmentioning

confidence: 99%