Low-energy measurements of electron-photon angular correlation in electron-impact excitation of the 2/sup 1/P state of helium

Journal Article · Tue Mar 01 00:00:00 EST 1983 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.27.1678· OSTI ID:6049874

Steph, N C; Golden, D E

Electron-photon angular correlations between electrons which have excited the 2/sup 1/P state of He and photons from the 2/sup 1/P..-->..1/sup 1/S transition have been studied for 27-, 30-, 35-, and 40-eV incident electrons. Values of lambda and Vertical BarchiVertical Bar obtained from these measurements are compared to values obtained in distorted-wave and R-matrix calculations. The values of lambda and Vertical BarchiVertical Bar have been combined to examine the behavior of Vertical BarO/sub 1//sub -//sup colvertical-bar/ (lambda(1-lambda)sinVertical BarchiVertical Bar), the nonvanishing component of orientation. At 27 eV, a substantial decrease was observed in the values of lambda and Vertical BarO/sub 1//sub -//sup colvertical-bar/, compared with their values for E> or =30 eV.

• Research Organization: Department of Physics and Astronomy, University of Oklahoma, Norman, Oklahoma 73019
• OSTI ID: 6049874
• Journal Information: Phys. Rev. A; (United States), Vol. 27:3
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ELECTRON-ATOM COLLISIONS
EXCITATION
HELIUM
ANGULAR DISTRIBUTION
COINCIDENCE SPECTROMETRY
CORRELATIONS
DISTORTED WAVE THEORY
EV RANGE 10-100
PHOTON EMISSION
R MATRIX
RADIATION DETECTION
SECONDARY EMISSION
SPATIAL DISTRIBUTION
ATOM COLLISIONS
COLLISIONS
DETECTION
DISTRIBUTION
ELECTRON COLLISIONS
ELEMENTS
EMISSION
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
FLUIDS
GASES
MATRICES
NONMETALS
RARE GASES
640304* - Atomic
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