Electron collisional excitation of argon-like Ni XI using the
Breit-Pauli R-matrix method |
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Authors: | N Verma A KS Jha M Mohan |
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Institution: | (1) Department of Physics and Astrophysics, Delhi University, Delhi, 110007, India |
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Abstract: | Electron excitation collision strengths for the transitions from the ground
state to the fine-structure levels of the 3s23p53d and
3s23p63d configurations in Ni XI are calculated using the
Breit-Pauli R-matrix method. Configuration interaction wavefunctions have
been used to represent the target states. The relativistic effects are
incorporated in the Breit-Pauli approximation by including one-body mass
correction, Darwin, and spin-orbit interaction terms in the scattering
equations. Collision strengths are tabulated at selected energies in the
range 10 to 75 Rydberg. Effective collision strengths are determined by
integrating collision strengths by assuming a Maxwellian distribution of
electron energies. The effective collision strengths are listed over a wide
temperature range (2×104-1×107 K) applicable to
astrophysical plasmas. Our results are the only collision strengths and
effective collision strengths available for this ion. We believe that the
data calculated in this work will be useful in solar, astrophysical and
laser applications. |
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Keywords: | 34 80 Dp Atomic excitation and ionization by electron impact 34 80 Kw Electron-ion scattering excitation and ionization |
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