2000
DOI: 10.1063/1.1302663
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Quantum mechanically complete measurements in electron impact excitation of helium

Abstract: A complete quantum description of the 3 ! D state of helium, that is the amplitudes and relative phases for the m = 0, ±2 magnetic sublevels are reported. All state multipoles (T(2) kq) (k = 0-4, k>q>-k) that describe the population and the anisotropy of the excited He(3 1 D) state are presented. The data were determined for 60eV incident electrons and 40°e lectron scattering angle. The experimental procedure was to measure the triple-coincidence, polarisation correlations of the sequential cascading photons (… Show more

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Cited by 2 publications
(1 citation statement)
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“…There have been several other studies of collisionally produced hexadecapole moments in atoms [16,17], and three groups have used Stokes parameter measurements to study ionization/excitation collisions in the heavy noble gases [4,[18][19][20]. To our knowledge, the present work represents the first study of angular momentum partitioning between shells of an excited state and the measurement of an atomic hexacontatetrapole.…”
Section: Angular Momentum Partitioning and Hexacontatetrapole Momentsmentioning
confidence: 86%
“…There have been several other studies of collisionally produced hexadecapole moments in atoms [16,17], and three groups have used Stokes parameter measurements to study ionization/excitation collisions in the heavy noble gases [4,[18][19][20]. To our knowledge, the present work represents the first study of angular momentum partitioning between shells of an excited state and the measurement of an atomic hexacontatetrapole.…”
Section: Angular Momentum Partitioning and Hexacontatetrapole Momentsmentioning
confidence: 86%