Photodetachment collisions

Conference · Fri Jun 01 00:00:00 EDT 1990 · AIP Conference Proceedings (American Institute of Physics); (USA)

OSTI ID:6045540

Pegg, D J ^[1]

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1. Department of Physics, University of Tennessee, Knoxville, TN (USA) Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN (USA)

A crossed-beam apparatus has been used to measure the cross sections (angular differential and integral) for photodetaching electrons from metastable He{sup {minus}} and stable B{sup {minus}} ions at {lambda}=696.2 nm. Kinematic effects were exploited, in a novel way, to enhance the precision of the measurements. The partial (angular integral) cross sections for He{sup {minus}} photodetachment are {sigma}(2{sup 3}S)=22.9{plus minus}1.0 Mb and {sigma}(2{sup 3}P)=10.0{plus minus}0.6 Mb. The corresponding cross section for B{sup {minus}} is {sigma}(2{sup 2}P)=16.5{plus minus}2.1 Mb. The calculated cross section for the photodetachment of D{sup {minus}} was used to establish an absolute scale for the relative measurements. Radiative attachment cross sections are derived from the photodetachment results using the principle of detailed balance.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6045540
• Report Number(s): CONF-890708--
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (USA), Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Vol. 205:1; ISSN 0094-243X; ISSN APCPC
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
BORON IONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DATA
DEUTERIUM IONS
DISTRIBUTION
ELECTRON DETACHMENT
ENERGY LEVELS
ENERGY SPECTRA
EXPERIMENTAL DATA
HELIUM IONS
INFORMATION
ION COLLISIONS
IONS
NUMERICAL DATA
P STATES
PHOTON COLLISIONS
PHOTON-ION COLLISIONS
S STATES
SPECTRA