Photodetachment cross sections for Li[sup [minus]]

Journal Article · Thu Oct 01 00:00:00 EDT 1992 · Physical Review A. General Physics; (United States)

DOI:https://doi.org/10.1103/PhysRevA.46.3924· OSTI ID:7174275

Dellwo, J; Liu, Y; Tang, C Y; Pegg, D J ^[1]; Alton, G D ^[2]

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1. Department of Physics, University of Tennessee, Knoxville, Tennessee 37996 (United States)
2. Physics Divison, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

Cross sections and asymmetry parameters associated with the process of photodetaching an electron from the Li[sup [minus]] ion via the process [ital h][nu]+Li[sup [minus]][r arrow]Li(2 [sup 2][ital S])+[ital e][sup [minus]]([epsilon][ital p]) have been measured at several photon energies including the region in the vicinity of the opening of the channel: [ital h][nu]+Li[sup [minus]][r arrow]Li(2 [sup 2][ital P])+[ital e][sup [minus]]([epsilon][ital s]). Strong coupling between these channels produces anomalous behavior in the [sup 2][ital S][epsilon][ital p] channel cross section. The measured cross sections are slightly lower than the theoretical predictions, but are in essential agreement within the combined uncertainties in the two values. A search has also been made for a [sup 1][ital P][degree] excited state of Li[sup [minus]] in the vicinity of the 2 [sup 2][ital P] threshold. The saturation characteristics of the photodetachment of Li[sup [minus]] and D[sup [minus]] ions have been investigated over a range of laser powers.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7174275
• Journal Information: Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 46:7; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ANIONS
ASYMMETRY COEFFICIENTS
CHARGED PARTICLES
CROSS SECTIONS
DYE LASERS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
GROUND STATES
IONIZATION
IONS
LASERS
LIQUID LASERS
LITHIUM
METALS
PHOTOIONIZATION