Experimental cross sections for electron-impact ionization of chromium ions: Cr/sup 6+/, Cr/sup 7+/, Cr/sup 8+/, and Cr/sup 10+/
Creators
- 1. Department of Physics, Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki, 319-11 Japan
Description
Absolute cross sections have been measured from below threshold to 1500 eV for electron-impact single ionization of chromium ions in initial charge states 6+, 7+, 8+, and 10+. The measurements utilized the Oak Ridge National Laboratory Electron Cyclotron Resonance ion source and electron-ion crossed-beams apparatus. The lowest three charge states, which have 3s23p/sup n/ ground-state electron configurations, all exhibit ionization onsets at lower energies than expected for ground-state ions, indicating the presence of ions in metastable configurations in the incident beams. Significant contributions to the total cross sections by excitation autoionization are observed for each ion. The present measurements are compared to calculations of direct ionization from the Lotz formula, and the Cr/sup 10+/ measurements are compared to previous data for the isoelectronic ion Ni/sup 14+/
Additional details
Publishing Information
- Journal Title
- Physical Review, A
- Journal Volume
- 39
- Journal Issue
- 5
- Series
- Phys. Rev., A.
- Journal Page Range
- 2397-2403
- ISSN
- 0556-2791
- CODEN
- PLRAA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 20038564
- Subject category
- S74: ATOMIC AND MOLECULAR PHYSICS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- CHROMIUM IONS; ELECTRON-ION COLLISIONS; EV RANGE 100-1000; EXPERIMENTAL DATA; IONIZATION; KEV RANGE 01-10; TOTAL CROSS SECTIONS
- Descriptors DEC
- ATOMIC IONS; CHARGED PARTICLES; COLLISIONS; CROSS SECTIONS; DATA; ELECTRON COLLISIONS; ENERGY RANGE; EV RANGE; INFORMATION; ION COLLISIONS; IONS; KEV RANGE; NUMERICAL DATA