Near-threshold photoionization spectrum of aligned Ca 4[ital s]5[ital p] [sup 1][ital P][sub 1]

Journal Article · Fri Dec 31 23:00:00 EST 1993 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.49.240· OSTI ID:5428762

McLaughlin, K W; Eschliman, D S; Francis, O P; Duquette, D W ^[1]

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1. Behlen Laboratory of Physics, University of Nebraska, Lincoln, Nebraska 68588-0111 (United States)

The relative cross section for photoionization from the 4[ital s]5[ital p] [sup 1][ital P][sub 1] excited level of neutral calcium has been measured using pulsed laser excitation and ionization of Ca atoms in an atomic beam. Photoelectrons are counted as a function of ionizing photon energy and polarization. Measurements cover the energy range from 51 300 to 51 700 cm[sup [minus]1] above the Ca [sup 1][ital S][sub 0] ground state at a resolution of approximately 0.15 cm[sup [minus]1]. The shapes and relative peak heights of resonances corresponding to the previously identified [sup 3][ital S][sub 1] and [sup 3][ital D][sub 1,2] autoionizing levels from the 3[ital d]4[ital d] configuration have been determined. A new, extremely strong resonance is also evident at 51 467 cm[sup [minus]1], and it has been tentatively identified with the 3[ital d]4[ital d] [sup 1][ital P][sub 1] level. This is an experimental identification of a doubly excited even-parity singlet level in calcium.

• OSTI ID: 5428762
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 49:1; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ALIGNMENT
ALKALINE EARTH METALS
CALCIUM
CROSS SECTIONS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
INELASTIC SCATTERING
IONIZATION
IONIZATION POTENTIAL
METALS
PHOTOIONIZATION
POLARIZATION
RESONANCE SCATTERING
SCATTERING
TOTAL CROSS SECTIONS