Precision calculation of low-energy electron-impact excitation cross sections of sodium

Journal Article · Mon Feb 15 00:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.022703· OSTI ID:21408229

Xiang, Gao ^[1]; Xiaoying, Han ^[2]; Voky, Lan; Feautrier, Nicole ^[3]; Jiaming, Li ^[1]

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1. Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China)
2. Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)
3. LERMA, UMR 8112 du CNRS, Observatoire de Paris, 92915 Meudon Cedex (France)

The collision cross sections of sodium from the ground state to the first four excited states at the incident energy ranging from 0 to 5.4 eV are calculated using the R-matrix method. The convergences of the cross sections are checked systematically by using four sets of high-quality target states, i.e., 5, 9, 14, and 19 physical target states. The influence of the Rydberg target states on the collision cross sections is also elucidated at higher incident energies; i.e., the amplitude of resonance structures will decrease with respect to the effective quantum number {upsilon} of the Rydberg target states. This result is very useful for the calculations of these cross sections at intermediate energy with finite target states by combining the partial-wave-expansion methods valid at low energy with the first Born approximation method valid at high energy, which would be of great importance in obtaining complete cross-section data for related scientific fields.

• OSTI ID: 21408229
• Journal Information: Physical Review. A, Vol. 81, Issue 2; Other Information: DOI: 10.1103/PhysRevA.81.022703; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ACCURACY
AMPLITUDES
BORN APPROXIMATION
COLLISIONS
CONVERGENCE
CROSS SECTIONS
ELECTRONS
EV RANGE
EXCITATION
EXCITED STATES
GROUND STATES
PARTIAL WAVES
R MATRIX
SODIUM
ALKALI METALS
APPROXIMATIONS
CALCULATION METHODS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
FERMIONS
LEPTONS
MATRICES
METALS