ISSN:
1434-6079
Keywords:
PACS. 34.80.Dp Atomic excitation and ionization by electron impact – 32.10.Hq Ionization potentials, electron affinities
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: 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 1.9×10 -16 cm 2 . 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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100530170248
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