Effective collision strengths for fine-structure transitions for the electron impact excitation of N II

Details Effective collision strengths for fine-structure transitions for the electron impact excitation of N II Effective collision strengths for fine-structure transitions for the electron impact excitation of N II

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...430..725h&link_type=abstract

Astronomy and Astrophysics, v.430, p.725-729 (2005)

Astronomy and Astrophysics

Astrophysics

17

Atomic Processes, Line: Formation, Methods: Analytical

Scientific paper

We present effective collision strengths for the electron impact excitation of singly ionized nitrogen which have been calculated using the R-matrix method. The 23 lowest LS states are included in the expansion of the total wavefunction. These target states arise from the 2s22p2, 2s2p3 and 2s22p3l(l=s,p,d) configurations, leading to 41 fine structure levels and 820 possible transitions. The fine-structure collision strengths were obtained by transforming to a jj-coupling scheme using the JAJOM program of Saraph and have been determined at a sufficiently fine energy mesh to delineate properly the resonance structure. The effective collision strengths were calculated by averaging the electron collision strengths over a Maxwellian distribution of velocities. Tabulations of the non-zero effective collision strengths are given for electron temperatures (Te) in the range log10 Te (K) = 2.0-5.5.
Table 2 is only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/430/725

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