Spin-exchange cross section for electron excitation of Na 3S-3P determined by a novel spectroscopic technique

Journal Article · Fri Jul 01 04:00:00 EDT 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.38.535· OSTI ID:7194048

Han, X L; Schinn, G W; Gallagher, A

An experimental technique is described which enables determination of the partial cross sections for electron excitation of atoms as a function of changes in spin and orbital angular momentum. This method provides a good signal-to-noise ratio in the energy region near threshold, and could be used to study long- or short-lived excited states of many atomic systems. Measurements for Na 3s-3p, near-threshold excitation are reported here. The results are generally in good agreement with the close-coupling calculations of D. L. Moores and D. W. Norcross (J. Phys. B 5, 1482 (1972)) for the largest ..delta..m/sub S/ and ..delta..m/sub L/ components of the cross section, but not for the component with chemically bond..delta..m/sub S/chemically bond = 1 and chemically bond..delta..m/sub L/chemically bond = 1, indicating that the exchange interaction is larger than previously recognized.

• Research Organization: Joint Institute for Laboratory Astro-p physics, National Bureau of Standards and University of Colorado, Boulder, Colorado 80309-0440
• OSTI ID: 7194048
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 38:1; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ATOM COLLISIONS
COLLISIONS
CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 01-10
EXCITATION
FLUORESCENCE
LASER SPECTROSCOPY
LUMINESCENCE
METALS
P STATES
S STATES
SODIUM
SPECTROSCOPY
SPIN EXCHANGE