Photodetachment of metastable He sup minus

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6608349

Thompson, J S; Dellwo, J ^[1]; Pegg, D J ^[2]; Compton, R N ^[3]; Alton, G D ^[4]

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1. Tennessee Univ., Knoxville, TN (USA). Dept. of Physics
2. Tennessee Univ., Knoxville, TN (USA). Dept. of Physics Oak Ridge National Lab., TN (USA)
3. Oak Ridge National Lab., TN (USA) Tennessee Univ., Knoxville, TN (USA). Dept. of Chemistry
4. Oak Ridge National Lab., TN (USA)

A crossed-beams apparatus has been used to measure angular distributions and cross sections for photoelectron detachment from metastable He{sup {minus}}. Energy- and angle-resolved electron spectroscopy was used to investigate the spectral dependences of the angular distribution of the photoelectrons. The angular distributions along with photoelectron yield measurements were used to determine the cross sections for photodetachment of He{sup {minus}} (2{sup 4}P) via the energy resolved He(2{sup 3}P) and He(2{sup 3}S) exit channels. The precision of the cross section measurements was enhanced by exploiting the kinematic effects associated with detachment from a fast beam source. Calculated cross sections for the photodetachment of H{sup {minus}} were used to establish an absolute scale for the He{sup {minus}} cross section measurements.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6608349
• Report Number(s): CONF-901116-10; ON: DE91000706
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
CHARGED PARTICLES
CROSS SECTIONS
DISTRIBUTION
ELECTRON DETACHMENT
ELECTRON SPECTROSCOPY
ENERGY LEVELS
EXCITED STATES
HELIUM IONS
IONS
METASTABLE STATES
PHOTOELECTRON SPECTROSCOPY
SPECTROSCOPY