Double photodetachment from the Cl[-]ion

Aguilar, A.University of Nevada, Reno (UNR),Lake Tahoe Community College (författare)

The correlated process involving the photodetachment of two electrons from the [Formula Presented] ion has been investigated over the photon energy range 20–45 eV. In the experiment, a beam of photons from the Advanced Light Source (ALS) was collinearly merged with a counterpropagating beam of [Formula Presented] ions from a sputter ion source. The [Formula Presented] ions produced in the interaction region were detected, and the normalized signal was used to monitor the relative cross section for the reaction. An absolute scale for the cross section was established by measuring the spatial overlap of the two beams and by determining the efficiency for collection and detection of the [Formula Presented] ions. The overall magnitude and shape of the measured cross section for this process agrees well with an R-matrix calculation. The calculation identifies the dominant mechanism leading to the production of the [Formula Presented] ion as being a direct nonresonant process involving the ejection of a pair of electrons from the valence shell. Less important is the indirect nonresonant process that involves the production and decay of core-excited and doubly excited states of the Cl atom in an intermediate step. Direct and indirect resonant mechanisms involving the excitation of a single [Formula Presented] core electron or more than one valence electron of the [Formula Presented] ion were found to be insignificant in the energy range studied.

Sandström, Joakim,1968Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Nevada, Reno (UNR),Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f3ajsm (författare)
Calabrese, D.Sierra College (författare)
Covington, A. M.Lake Tahoe Community College (författare)
Cisneros, C.Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico (författare)
Davis, V. T. (författare)
Gulley, M. S.Los Alamos National Laboratory (författare)
Halka, M.Embry-Riddle Aeronautical University (författare)
Hanstorp, Dag,1960Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),Chalmers tekniska högskola,Chalmers University of Technology,University of Gothenburg(Swepub:gu)xhanda (författare)
Sandström, Joakim,1968Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f3ajsm (författare)
McLaughlin, B. M.Queen's University Belfast (författare)
Pegg, D. J.University of Tennessee (författare)
University of Nevada, Reno (UNR)Lake Tahoe Community College (creator_code:org_t)

Ingår i:Physical Review A - Atomic, Molecular, and Optical Physics69:22469-99262469-9934
Ingår i:Physical Review A69:21050-2947

Av författaren/redakt...: Aguilar, A.; Sandström, Joaki ...; Calabrese, D.; Covington, A. M.; Cisneros, C.; Davis, V. T.; visa fler...; Gulley, M. S.; Halka, M.; Hanstorp, Dag, 1 ...; McLaughlin, B. M ...; Pegg, D. J.; visa färre...

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