Valence-shell photoionization of the chlorinelike Ca{sup 3+} ion

Journal Article · Sat May 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.053416· OSTI ID:21408853

Alna'washi, Ghassan A; Lu, M; Habibi, M; Phaneuf, R A; Kilcoyne, A L. D.; Schlachter, A S; Cisneros, C; McLaughlin, B M ^[1]

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1. Department of Physics, MS-220, University of Nevada, Reno, Nevada 89557 (United States)

Absolute photoionization measurements were performed for a mixture of {sup 2}P{sub 3/2}{sup o} ground-state and {sup 2}P{sub 1/2}{sup o} metastable-state Ca{sup 3+} ions over the photon energy range 65.7-104.6 eV by merging an ion beam with a beam of monochromatized synchrotron radiation. The ionization threshold energy of the {sup 2}P{sub 3/2}{sup o} ground state was measured to be 67.063 {+-} 0.015 eV, which is 0.207 eV lower than the value tabulated in the NIST database. Most of the observed resonances associated with multiple Rydberg series of autoionizing states have been assigned spectroscopically using the quantum defect form of the Rydberg formula, guided by relativistic Hartree-Fock calculations of resonance energies and oscillator strengths. Intermediate coupling R-matrix calculations performed using the semi-relativistic Breit-Pauli approximation are in suitable agreement with measured absolute photoionization cross section in the energy range studied for this complex Cl-like ion species.

• OSTI ID: 21408853
• Journal Information: Physical Review. A, Vol. 81, Issue 5; Other Information: DOI: 10.1103/PhysRevA.81.053416; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CROSS SECTIONS
EV RANGE
GROUND STATES
HARTREE-FOCK METHOD
INTERMEDIATE COUPLING
ION BEAMS
IONS
METASTABLE STATES
OSCILLATOR STRENGTHS
PHOTOIONIZATION
PHOTONS
R MATRIX
RELATIVISTIC RANGE
RESONANCE
RYDBERG STATES
SYNCHROTRON RADIATION
THRESHOLD ENERGY
VALENCE
APPROXIMATIONS
BEAMS
BOSONS
BREMSSTRAHLUNG
CALCULATION METHODS
CHARGED PARTICLES
COUPLING
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY
ENERGY LEVELS
ENERGY RANGE
EXCITED STATES
IONIZATION
MASSLESS PARTICLES
MATRICES
RADIATIONS