Effective collision strengths for O II

Details Effective collision strengths for O II Effective collision strengths for O II

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...408..753m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 408, no. 2, p. 753-757.

Astronomy and Astrophysics

Astrophysics

39

Atomic Collisions, Forbidden Transitions, Molecular Excitation, Oxygen Ions, Collision Parameters, Maxwell-Boltzmann Density Function

Scientific paper

Accurate electron collisional excitation strengths Omega, from 11 state R-matrix calculations performed in LS pi coupling, are convoluted with a Maxwellian velocity distribution to obtain effective collision strengths T for a range of temperatures 5 x 10 exp 3 to 10 exp 6 K for electron excitation of singly ionized atomic oxygen. This work considers electron collisional excitation of the O II ion from the 1s2 2s2 2p3 (4S ex p 0) to the 1s2 2s2 2p3 (2D exp 0), 2P exp 0) and to the higher lying 1s2 2s2 p4 (4P exp e) and 1s2 2s2 2p2 3s (4p expe) states. In addition, we consider the 1s2 2s2 2p3 (2D exp 0) to 1s2 2s2 2p3 (2p exp 0) transition. Comparison with existing values in the literature indicates improved results for the effective collision strengths at all temperatures.

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