Multidetection (e,2e) electron spectrometer
- Centre for Atomic, Molecular and Surface Physics, Department of Physics, University of Western Australia, Perth, Western Australia 6009 (Australia)
An electron-pair coincidence spectrometer, using only a single electrostatic toroidal analyzer, has been developed for the study of final-state electron pairs following ionization by electron impact. The system allows the angular and energy distribution of electron pairs emitted in a selected plane to be detected by a single planar microchannel plate stack followed by two position-sensitive semicircular wedge-and-strip anodes. The output signals are decoded into energy, angle and nanosecond coincidence timing information from which relative energy and angular triple differential ionization cross sections are determined. The performance of the instrument is indicated by He I photoionization of krypton and the first measurements of differential cross sections for electron-impact ionization of the {sup 2}P{sub 3/2} and {sup 2}P{sub 1/}2 states of krypton. For perpendicular-plane scattering and an excess energy of 10 eV for the {sup 2}P{sub 3/2} state and 0.67 eV less for the {sup 2}P{sub 1/2} state, these cross sections are significantly different for the two states and indicate the importance of the final state of the ion in the scattering process.
- OSTI ID:
- 20722895
- Journal Information:
- Review of Scientific Instruments, Vol. 76, Issue 6; Other Information: DOI: 10.1063/1.1921387; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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