Photoionization and electron-impact ionization of Kr{sup 3+}

Journal Article · Fri Dec 15 00:00:00 EST 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.062701· OSTI ID:20976472

Lu, M; Alna'washi, G; Habibi, M; Gharaibeh, M F; Phaneuf, R A; Kilcoyne, A L. D.; Levenson, E; Schlachter, A S; Cisneros, C; Hinojosa, G ^[1]

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1. Department of Physics, MS 220, University of Nevada, Reno, Nevada 89557-0058 (United States)

Absolute photoionization cross sections for Kr{sup 3+} were measured in the energy range 39.05-143.2 eV for single ionization and 120.6-137.7 eV for double ionization. For comparison, an electron-impact single-ionization measurement was made in the energy range 43.1-179.1 eV and normalized to previously published absolute measurements. The Flexible Atomic Code and Cowan atomic structure codes were used to calculate energy levels, excitation energies and oscillator strengths for 3d{yields}np, 3d{yields}nf, and 4s{yields}np autoionizing transitions from the ground and metastable states. From the single-photoionization measurements, ionization thresholds of the {sup 2}P{sup o}{sub 3/2}, {sup 2}D{sup o}{sub 5/2} metastable states and {sup 4}S{sup o}{sub 3/2} ground state were measured to be 46.62{+-}0.02, 48.59{+-}0.01, and 50.70{+-}0.02 eV, nearly 2 eV lower than National Institute of Standards and Technology tabulated values. Within the experimental uncertainty, oscillator strengths determined from the photoionization measurements are in agreement with both calculations. Excitation-autoionization and resonant-excitation double-autoionization features are evident in the electron-impact ionization cross section.

• OSTI ID: 20976472
• Journal Information: Physical Review. A, Vol. 74, Issue 6; Other Information: DOI: 10.1103/PhysRevA.74.062701; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
AUTOIONIZATION
CATIONS
COMPUTER CALCULATIONS
CROSS SECTIONS
ELECTRON-ATOM COLLISIONS
ELECTRONS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EV RANGE
EXCITATION
EXCITED STATES
GROUND STATES
KRYPTON IONS
METASTABLE STATES
MULTICHARGED IONS
OSCILLATOR STRENGTHS
PHOTOIONIZATION
PHOTON-ATOM COLLISIONS