Accurate Theoretical Atomic Cross Sections (Physics)
{'Code': '03010500', 'Directorate': {'Abbreviation': 'MPS', 'LongName': 'Direct For Mathematical & Physical Scien'}, 'Division': {'Abbreviation': 'PHY', 'LongName': 'Division Of Physics'}}
{'SignBlockName': 'Barry I. Schneider', 'PO_EMAI': None, 'PO_PHON': None}
The interactions between simple charged particles and atoms                will be examined within the framework of a perturbation series                  approach.  A first and fundamental question concerns the rate of                convergence of perturbation series and whether it is in practice                possible to calculate accurate theoretical cross sections.  The                 second aspect of the work will involve the application of these                 techniques to specific problems of current interest, including                  electron excitation of sodium, elastic positron scattering,                     electron impact ionization, and simultaneous electron-photon                    excitation.  Second order amplitudes are evaluated with the                     method of Dalgarno and Lewis; the question is whether a                         particular choice for the distorted Green's function can be                     found which will optimize the rate of convergence of                            perturbation series.
{'FirstName': 'Don', 'LastName': 'Madison', 'PI_MID_INIT': 'H', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Don H Madison', 'EmailAddress': 'madison@mst.edu', 'NSF_ID': '000402769', 'StartDate': '11/15/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Missouri University of Science and Technology', 'CityName': 'ROLLA', 'ZipCode': '654091330', 'PhoneNumber': '5733414134', 'StreetAddress': '300 W. 12TH STREET', 'StreetAddress2': '202 CENTENNIAL HALL', 'CountryName': 'United States', 'StateName': 'Missouri', 'StateCode': 'MO', 'CONGRESSDISTRICT': '08', 'CONGRESS_DISTRICT_ORG': 'MO08', 'ORG_UEI_NUM': 'Y6MGH342N169', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF MISSOURI SYSTEM', 'ORG_PRNT_UEI_NUM': None}
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[{'Code': '1245', 'Text': 'THEORETICAL PHYSICS'}, {'Code': '9120', 'Text': 'CROSS-DIRECTORATE PROGRAMS'}]
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