Introduction Nonrelativistic CCC theory Comparison with experiment The convergent close-coupling method for electron-atom scattering I. Bray, D. V. Fursa, A. S. Kadyrov, A. T. Stelbovics ARC Centre for Antimatter-Matter Studies, Curtin University of Technology, Perth, Western Australia IAEA, Vienna, November, 2009 Igor Bray <[email protected]> CCC method for electron-atom scattering
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The convergent close-coupling method for electron-atom scattering · 2009-11-11 · Introduction Nonrelativistic CCC theory Comparison with experiment The convergent close-coupling
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IntroductionNonrelativistic CCC theory
Comparison with experiment
The convergent close-coupling methodfor electron-atom scattering
I. Bray, D. V. Fursa, A. S. Kadyrov, A. T. Stelbovics
ARC Centre for Antimatter-Matter Studies, Curtin University of Technology, Perth,Western Australia
IAEA, Vienna, November, 2009
Igor Bray <[email protected]> CCC method for electron-atom scattering
IntroductionNonrelativistic CCC theory
Comparison with experiment
Igor Bray <[email protected]> CCC method for electron-atom scattering
IntroductionNonrelativistic CCC theory
Comparison with experiment
Outline
1 IntroductionMotivationDistant historyRecent history
3 Comparison with experimentelectron-impact excitationelectron-impact ionisationproton-impact on hydrogen
Igor Bray <[email protected]> CCC method for electron-atom scattering
IntroductionNonrelativistic CCC theory
Comparison with experiment
MotivationDistant historyRecent history
IntroductionMotivation
The primary motivation is to provide accurate atomiccollision data for science and industry:
AstrophysicsFusion researchLighting industryMedical and materials applications
Provide a rigorous foundation for collision theory withlong-ranged (Coulomb) potentials.
Igor Bray <[email protected]> CCC method for electron-atom scattering
IntroductionNonrelativistic CCC theory
Comparison with experiment
MotivationDistant historyRecent history
IntroductionMotivation
The primary motivation is to provide accurate atomiccollision data for science and industry:
AstrophysicsFusion researchLighting industryMedical and materials applications
Provide a rigorous foundation for collision theory withlong-ranged (Coulomb) potentials.
Igor Bray <[email protected]> CCC method for electron-atom scattering
IntroductionNonrelativistic CCC theory
Comparison with experiment
MotivationDistant historyRecent history
IntroductionDistant history
Prior to the 1990s theory and experiment generallydid not agree for:
electron-hydrogen excitation or ionisation,electron-helium excitation or ionisation,single or double photoionisation of helium.
Consequently, we have been developing theconvergent close-coupling (CCC) theory forelectron/positron/photon/(anti)proton collisions withatoms/ions/molecules that is applicable at allenergies for the major excitation and ionisationprocesses.
Igor Bray <[email protected]> CCC method for electron-atom scattering
IntroductionNonrelativistic CCC theory
Comparison with experiment
MotivationDistant historyRecent history
IntroductionDistant history
Prior to the 1990s theory and experiment generallydid not agree for:
electron-hydrogen excitation or ionisation,electron-helium excitation or ionisation,single or double photoionisation of helium.
Consequently, we have been developing theconvergent close-coupling (CCC) theory forelectron/positron/photon/(anti)proton collisions withatoms/ions/molecules that is applicable at allenergies for the major excitation and ionisationprocesses.
Igor Bray <[email protected]> CCC method for electron-atom scattering
IntroductionNonrelativistic CCC theory
Comparison with experiment
MotivationDistant historyRecent history
IntroductionRecent history
Prior to 2008, no satisfactory mathematicalformulation in the case of long-range (Coulomb)potentials for positive-energy scattering in
Two-body problemsThree-body problems
Consequently, have developed a surface integralapproach to scattering theory that is valid for short-and long-range potentials, see Kadyrov et al. PRL,101, 230405 (2008) and Annals of Physics 324 1516(2009).
Igor Bray <[email protected]> CCC method for electron-atom scattering
IntroductionNonrelativistic CCC theory
Comparison with experiment
MotivationDistant historyRecent history
IntroductionRecent history
Prior to 2008, no satisfactory mathematicalformulation in the case of long-range (Coulomb)potentials for positive-energy scattering in
Two-body problemsThree-body problems
Consequently, have developed a surface integralapproach to scattering theory that is valid for short-and long-range potentials, see Kadyrov et al. PRL,101, 230405 (2008) and Annals of Physics 324 1516(2009).
Igor Bray <[email protected]> CCC method for electron-atom scattering
Igor Bray <[email protected]> CCC method for electron-atom scattering
IntroductionNonrelativistic CCC theory
Comparison with experiment
electron-impact excitationelectron-impact ionisationproton-impact on hydrogen
Concluding remarks
A general surface-integral approach to scatteringtheory has been formulated.There are (almost) no substantial discrepanciesbetween CCC and experiment for:
electron-impact excitation or ionisation of quasi one-and two-electron targetsphoton-impact single and double ionisation of He
Presently we are extending CCC topositron collisions with quasi one- and two-electrontargetsmulti-channel proton collisionsmore complicated targets, such as inert gases andmolecules.
Igor Bray <[email protected]> CCC method for electron-atom scattering
IntroductionNonrelativistic CCC theory
Comparison with experiment
electron-impact excitationelectron-impact ionisationproton-impact on hydrogen
Concluding remarks
A general surface-integral approach to scatteringtheory has been formulated.There are (almost) no substantial discrepanciesbetween CCC and experiment for:
electron-impact excitation or ionisation of quasi one-and two-electron targetsphoton-impact single and double ionisation of He
Presently we are extending CCC topositron collisions with quasi one- and two-electrontargetsmulti-channel proton collisionsmore complicated targets, such as inert gases andmolecules.
Igor Bray <[email protected]> CCC method for electron-atom scattering
IntroductionNonrelativistic CCC theory
Comparison with experiment
electron-impact excitationelectron-impact ionisationproton-impact on hydrogen
Concluding remarks
A general surface-integral approach to scatteringtheory has been formulated.There are (almost) no substantial discrepanciesbetween CCC and experiment for:
electron-impact excitation or ionisation of quasi one-and two-electron targetsphoton-impact single and double ionisation of He
Presently we are extending CCC topositron collisions with quasi one- and two-electrontargetsmulti-channel proton collisionsmore complicated targets, such as inert gases andmolecules.
Igor Bray <[email protected]> CCC method for electron-atom scattering