(e,2e) ionization studies of alkaline-earth-metal and alkali-earth-metal targets: Na, Mg, K, and Ca, from near threshold to beyond intermediate energies

doi:10.1103/PHYSREVA.72.0

Title: (e,2e) ionization studies of alkaline-earth-metal and alkali-earth-metal targets: Na, Mg, K, and Ca, from near threshold to beyond intermediate energies

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Abstract

A comprehensive set of experimental data is presented for the electron impact ionization differential cross sections of sodium, magnesium, potassium, and calcium. A coplanar symmetric geometry was chosen for these (e,2e) coincidence studies, the energies ranging from near threshold to around fifteen times the first ionization potential. The results reveal a complex structure in both angle and energy which depends on the chosen target. Similarities and differences in the overall structure are found for the targets which have been studied. The results are compared to the measured cross section for helium over the same incident energy regime. The calcium results are also compared to recent theoretical calculations using a distorted wave Born approximation and the convergent close coupling method. Clear discrepancies are found between both theories and with experiment.

Authors:

Murray, Andrew James ^[1]

School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom)

Publication Date:: Thu Dec 15 00:00:00 EST 2005

OSTI Identifier:: 20786310

Resource Type:: Journal Article

Resource Relation:: Journal Name: Physical Review. A; Journal Volume: 72; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevA.72.062711; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)

Country of Publication:: United States

Language:: English

Subject:: 74 ATOMIC AND MOLECULAR PHYSICS; CALCIUM; COUPLING; DIFFERENTIAL CROSS SECTIONS; DWBA; ELECTRON-MOLECULE COLLISIONS; ELECTRONS; GEOMETRY; HELIUM; IONIZATION; IONIZATION POTENTIAL; MAGNESIUM; POTASSIUM; SODIUM

Citation Formats


                    Murray, Andrew James. (e,2e) ionization studies of alkaline-earth-metal and alkali-earth-metal targets: Na, Mg, K, and Ca, from near threshold to beyond intermediate energies.  United States: N. p., 2005. 
        Web.  doi:10.1103/PHYSREVA.72.0.

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                    Murray, Andrew James. (e,2e) ionization studies of alkaline-earth-metal and alkali-earth-metal targets: Na, Mg, K, and Ca, from near threshold to beyond intermediate energies.  United States.  doi:10.1103/PHYSREVA.72.0.

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                    Murray, Andrew James. Thu .  
        "(e,2e) ionization studies of alkaline-earth-metal and alkali-earth-metal targets: Na, Mg, K, and Ca, from near threshold to beyond intermediate energies".  United States.  
        doi:10.1103/PHYSREVA.72.0.

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@article{osti_20786310,

  title        = {(e,2e) ionization studies of alkaline-earth-metal and alkali-earth-metal targets: Na, Mg, K, and Ca, from near threshold to beyond intermediate energies},

  author       = {Murray, Andrew James},

  abstractNote = {A comprehensive set of experimental data is presented for the electron impact ionization differential cross sections of sodium, magnesium, potassium, and calcium. A coplanar symmetric geometry was chosen for these (e,2e) coincidence studies, the energies ranging from near threshold to around fifteen times the first ionization potential. The results reveal a complex structure in both angle and energy which depends on the chosen target. Similarities and differences in the overall structure are found for the targets which have been studied. The results are compared to the measured cross section for helium over the same incident energy regime. The calcium results are also compared to recent theoretical calculations using a distorted wave Born approximation and the convergent close coupling method. Clear discrepancies are found between both theories and with experiment.},

  doi          = {10.1103/PHYSREVA.72.0},

  journal      = {Physical Review. A},

  number       = 6,

  volume       = 72,

  place        = {United States},

  year         = {Thu Dec 15 00:00:00 EST 2005},

  month        = {Thu Dec 15 00:00:00 EST 2005}

}

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DOI: 10.1103/PHYSREVA.72.0

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