Electron-impact excitation cross-section measurements of highly charged heliumlike and lithiumlike ions

Journal Article · Wed Feb 01 00:00:00 EST 1995 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.51.1214· OSTI ID:6601017

Wong, K L; Beiersdorfer, P; Reed, K J; Vogel, D A ^[1]

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1. Lawrence Livermore National Laboratory, University of California, Livermore, California 94550 (United States)

The cross sections for electron-impact excitation of the heliumlike forbidden line [ital z], intercombination lines [ital y] and [ital x], and the resonance line [ital w], together with the associated lithiumlike collisional satellite lines [ital q], [ital r], [ital t], [ital u], and [ital v] have been measured for Ti, V, Cr, Mn, and Fe ([ital Z]=22--26) on the Livermore electron beam ion trap. The measurements were made near the threshold for excitation of the heliumlike transitions, where no other processes can contribute to the excitation of the lines, and are normalized to the cross sections for radiative electron capture. The uncertainties in the measurements are less than 8% for the heliumlike Fe transitions and between 11% and 15% for the lithiumlike Fe transitions together with a 3% systematic uncertainty from the normalization to theoretical radiative recombination cross sections. We find good agreement with results from a distorted-wave calculation.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6601017
• Journal Information: Physical Review A; (United States), Vol. 51:2; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ELECTRON-ION COLLISIONS
EXCITATION
ISOELECTRONIC ATOMS
CHROMIUM IONS
FORBIDDEN TRANSITIONS
IRON IONS
MANGANESE IONS
THRESHOLD ENERGY
TITANIUM IONS
VANADIUM IONS
ATOMS
CHARGED PARTICLES
COLLISIONS
ELECTRON COLLISIONS
ENERGY
ENERGY-LEVEL TRANSITIONS
ION COLLISIONS
IONS
664300* - Atomic & Molecular Physics- Collision Phenomena- (1992-)