Electron impact excitation of Ni XIX using theR-matrix method |
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| Authors: | Man Mohan M Le Dourneuf A Hibbert V M Burke |
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| Institution: | (1) Department of Physics and Astrophysics, Delhi University, 110 007 Delhi, India;(2) Départment “Atomes et Molécules en Astrophysique”, Observatoire de Paris, Laboratoire de Théorie des Processus Atomiques et Moléculaires (U.P.R. 261 du C.N.R.S.), 92195 Meudon, France;(3) Department of Applied Mathematics and Theoretical Physics, The Queen’s University, BT7 1NN Belfast, UK |
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| Abstract: | Collision strengths for all the transitions between the 15 lowest states of neon-like Ni XIX have been calculated for electron
impact in the 80–140 Ry energy range. Configuration-interaction wavefunctions have been used to represent the target states.
The standardR-matrix code has been used to calculate the lower scattering partial waves (L≤9), while a no-exchange version of the same code has been used to compute efficiently the higher partial waves (L≥10). Effective collision strengths for 105 excitation transitions between the ground state 2s
22p
6
1
S
e and the 142s
22p
53l Rydberg states are tabulated for electron temperatures in the range logT=5.40 to logT=7.00, withT expressed in °K. |
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| Keywords: | Collision strength configuration interaction |
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