This article has an erratum: [https://doi.org/10.1051/0004-6361:20041855e]
Volume 432, Number 2, March III 2005
|Page(s)||731 - 736|
|Section||Atomic, molecular, and nuclear data|
|Published online||02 March 2005|
Effective collision strengths for electron impact excitation of C II*
Department of Applied Mathematics and Theoretical Physics, The Queen's University of Belfast, Belfast BT7 1NN, Northern Ireland e-mail: firstname.lastname@example.org
Accepted: 8 November 2004
We extend a previous calculation of effective collision strengths for electron impact excitation of the boron-like ion . The earlier work was restricted to the excitation within the 2s22p ground configuration and the sixteen 2s22p–2s2p2 fine-structure transitions whilst the present paper considers all fine-structure transitions among the levels arising from the lowest 16 LS states. The collisional cross sections are computed in the multichannel close-coupling R-matrix approximation, in which sophisticated configuration-interaction wave functions are used to represent the target states. The 16 states included have the following basis configurations: the 2s22p ground state, four 2s2p2 states, three 2p3 states, one 2s2p3s state as well as the 2s23 and 2s24 states. The 16 LS target states correspond to 30 fine-structure levels and lead to a total of 435 fine-structure transitions. In this paper we tabulate effective collision strengths, obtained by averaging the electron collision strengths over a Maxwellian distribution of velocities, for electron temperatures in the range given by (K) = 3.0-5.5, suitable for most astrophysical applications and laboratory plasma diagnostics. Significant differences from a previous calculation are noted and comparisons are made with some recent experimental data.
Key words: atomic processes / line: formation / methods: analytical
© ESO, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.