NEW OF SCHWINGER VARIATIONAL PRINCIPLE FOR K-SHELL EXCITATION OF CA{sup 18+} (1S{sup 2}) IONS BY IMPACT OF VARIOUS ATOMS AT 8.6 MeV/amu
- Laboratoire de Physique Theorique, Faculte des Sciences, Universite Abou-Bekr-belkaied, Tlemcen (Algeria)
- Laboratoire de Physique Moleculaire et des Collisions, Universite de Metz, 1 Bd Arago, 57078, Metz (France)
A new variational impact parameter approach to the process of direct electronic excitation of atoms by impact of ions at intermediate velocities regimes was shown to be very successful in predicting the saturation of cross sections when the projectile charge is increased [1-4]. In our approach, this new procedure is based on the fractional form of the Schwinger variational principle and applied to study K-shell excitation of Ca{sup 18+} (1s{sup 2}) ions impinging at 8.6 MeV/amu on various gases (H{sub 2}, He, N{sub 2}, O{sub 2}, Ne, Ar, Kr, Xe). The excitation cross sections are compared with another theoretical approaches, like Born approximation. All obtained results stay in good agreement with experimental data of Xiang-Yuan Xu et al.[5].
- OSTI ID:
- 21608486
- Journal Information:
- AIP Conference Proceedings, Vol. 1370, Issue 1; Conference: SPS55: 5. Saudi physical society conference, Abha (Saudi Arabia), 25-27 Oct 2010; Other Information: DOI: 10.1063/1.3638514; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALGEBRA
ATOMS
BORN APPROXIMATION
CALCIUM IONS
CHARGE EXCHANGE
CROSS SECTIONS
EXCITATION
EXCITED STATES
HELIUM
HYDROGEN
IMPACT PARAMETER
ION-ATOM COLLISIONS
K SHELL
MATRICES
MEV RANGE
MULTICHARGED IONS
NITROGEN
SCHWINGER VARIATIONAL METHOD
APPROXIMATIONS
ATOM COLLISIONS
CALCULATION METHODS
CHARGED PARTICLES
COLLISIONS
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
FLUIDS
GASES
ION COLLISIONS
IONS
MATHEMATICS
NONMETALS
RARE GASES
VARIATIONAL METHODS