Photorecombination of ions: search for interference effects, recombination at low energies and rate coefficient in plasmas

Autor:	T. Bartsch, Stefan Schippers, Alexander Wolf, Gerald Gwinner, J. Linkemann, Alfred Müller, A. A. Saghiri, C. Brandau
Rok vydání:	1998
Předmět:	Physics Range (particle radiation) Excited state Radiative transfer Resonance Plasma Atomic physics Condensed Matter Physics Atomic and Molecular Physics and Optics Storage ring Recombination Ion
Zdroj:	Journal of Physics B: Atomic, Molecular and Optical Physics. 31:4873-4886
ISSN:	1361-6455 0953-4075
DOI:	10.1088/0953-4075/31/21/017
Popis:	In the search for interference between radiative and dielectronic recombination (RR and DR), absolute recombination rate coefficients for Ar-like ions have been measured at the Heidelberg Test Storage Ring in the centre-of-mass energy range 0-80 eV. The dominant recombination channels beside RR is DR via the formation of (33d ) and (33d ) intermediate doubly excited states. The DR rate coefficient in plasmas is inferred from this measurement. It is about a factor of 3 lower than the previously available result based on a semi-empirical calculation. Asymmetric lineshapes due to quantum mechanical interference as recently predicted theoretically for isoelectronic ions have not been observed. The broad (3) DR resonance expected on the basis of multi-configuration Hartree-Fock calculations at 3.0 eV with a width of 1.3 eV appears to be shifted towards zero centre-of-mass energy where an unexplained recombination rate enhancement of a factor of 2 beyond the sum of RR and DR rates is observed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1e06a13dc8ceec5293421da2ba32890c https://doi.org/10.1088/0953-4075/31/21/017 Zobrazit plný text záznamu