https://doi.org/10.1007/s100530170248
Electron impact single detachment on the F− ions using the heavy ion storage ring CRYRING: Cross-section determination
1
Department of Physics, Chalmers University of Technology/Göteborg University, 412 96 Göteborg, Sweden
2
Department of Physics, Stockholm University, Box 6730, 113 85 Stockholm, Sweden
3
Institute of Physics, Pedagogical University, 25-405 Kielce, Poland
4
Manne Siegbahn Laboratory, Frescativägen 24, 104 05 Stockholm, Sweden
5
LCAR (UMR 5589) , Université Paul Sabatier-Toulouse III, 118 route de Narbonne, bâtiment III R1B4, 31062 Toulouse
Cedex 4, France
Corresponding author: a arnaud.lepadellec@irsamc.ups-tlse.fr
Received:
14
June
2000
Revised:
11
September
2000
Published online: 15 March 2001
Electron Impact Single Detachment (EISD) of F- has been studied using the heavy ion storage
ring CRYRING at the Manne Siegbahn Laboratory, Stockholm, Sweden. F- ions stored in the
ring were merged with an electron beam in one of the ring sections. Neutral F atoms produced in
the EISD process were detected in the zero-degree direction using a surface barrier detector. The
threshold for the detachment process was found to be around 7.6 eV, thus more than twice the
binding energy of F-. The cross-sections increased smoothly up to 55 eV where it reached a
maximum of 
. At higher energies a slow decrease of the cross-section was observed,
which follows the energy dependence predicted by the Bethe-Born approximation. The
experiment showed that CRYRING can be used favourably for studies of anions, and several
experiments are forthcoming.
PACS: 34.80.Dp – Atomic excitation and ionization by electron impact / 32.10.Hq – Ionization potentials, electron affinities
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001
