Dielectronic recombination of highly charged ions

doi:10.1016/0375-9601(71)90339-2

Physics Letters A

Volume 37, Issue 1, 25 October 1971, Pages 75-76

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Abstract

Cross sections for dielectronic recombination of C⁵⁺, O⁷⁺ and Ne⁹⁺ are calculated. The results should be useful in calibration of experiments using beams of highly charged ions produced from Van der Graaff accelerators.

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Cited by (1)

Dielectronic recombination of highly charged ions with spin-polarized electrons
2017, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Citation Excerpt :
The dielectronic recombination (DR) of highly charged ions is one of the most “elementary” atomic processes and has been studied for many decades [1,2]. In the early days of DR studies, attention was paid primarily to the process itself, i.e., to measuring the DR cross sections and resonance strengths of various ions [3,4]. Moreover, as one of the dominant electron recombination processes in plasmas, the total and partial DR rate coefficients were intensively investigated at various plasma densities and temperatures for their applications in plasma modeling, especially for gold and tungsten ions [5–9].
Angular distribution and linear polarization of photon emission following dielectronic recombination of initially lithium-like ions with spin-polarized electrons are studied. In particular, a general expression is derived for the alignment parameter of the doubly excited states produced via the resonant capture of spin-polarized electrons. By means of the alignment parameter, moreover, the angular distribution and linear polarization of the subsequently emitted photons are further obtained. Detailed computations are performed for the $1 s^{2} 2 s J_{0} = 1 / 2 + ε e^{-} \to 1 s 2 s^{2} 2 p_{1 / 2} J = 1 \to 1 s^{2} 2 s^{2} J_{f} = 0 + γ$ resonant electron capture and subsequent radiative decay of iodine ions. It is found that the spin polarization of the incident electrons changes only the $q = \pm 1$ components of the alignment parameter $A_{2 q}$ . As a consequence, the electron spin polarization contributes weakly to the $γ$ photon angular distribution and linear polarization that are dominantly determined by the $A_{20}$ parameter.

^☆: This research was supported by the Advanced Research Projects Agency of the Department of Defense and was monitored by Army Research Office-Durham under Contract No. DA-31-124-ARO-D-440

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Physics Letters A

Dielectronic recombination of highly charged ions☆

Abstract

Astrophys. J.

Astrophys. J.

Astrophys. J.

Nature

Dielectronic recombination of highly charged ions with spin-polarized electrons