Preprint/Journal Article

GSI-2013-04774

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Recombination of bare $Bi^{83+}$ ions with electrons

Hoffknecht, A. (Corresponding author) ; Brandau, C. ; Bartsch, T. ; Böhme, C. ; Knopp, H. ; Schippers, S. ; Müller, A. ; Kozhuharov, C.GSI* ; Beckert, K.GSI* ; Bosch, F.GSI* ; Franzke, B.GSI* ; Krämer, A.GSI* ; Mokler, P.GSI* ; Nolden, F.GSI* ; Steck, M. ; Stachura, Z. ; Stöhlker, T.GSI*

2000
APS College Park, Md.

Please use a persistent id in citations: doi:10.1103/PhysRevA.63.012702

Abstract: Electron-ion recombination of completely stripped Bi83+ was investigated at the Experimental Storage Ring (ESR) of the GSI in Darmstadt. It was the first experiment of this kind with a bare ion heavier than argon. Absolute recombination rate coefficients have been measured for relative energies between ions and electrons from 0 up to about 125 eV. In the energy range from 15 meV to 125 eV a very good agreement is found between the experimental result and theory for radiative recombination (RR). However, below 15 meV the experimental rate increasingly exceeds the RR calculation and at Erel = 0 eV it is a factor of 5.2 above the expected value. For further investigation of this enhancement phenomenon the electron density in the interaction region was set to 1.6E6/cm3, 3.2E6/cm3 and 4.7E6/cm3. This variation had no significant influence on the recombination rate. An additional variation of the magnetic guiding field of the electrons from 70 mT to 150 mT in steps of 1 mT resulted in periodic oscillations of the rate which are accompanied by considerable changes of the transverse electron temperature.

Note: 12 pages, 14 figures, to be published in Phys. Rev. A, see also http://www.gsi.de/ap/ and http://www.strz.uni-giessen.de/~k3

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Contributing Institute(s):

1. Atomphysik (ATP)

Research Program(s):

1. 899 - ohne Topic (POF2-899) (POF2-899)

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Database coverage:
; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection ; Zoological Record

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