Oscillator Strengths and Electron Collision Rates for Fine-Structure Transitions in OII

@article{citeulike:2858497, abstract = {Electron impact excitation collision strengths for the fine-structure transitions between the lowest 13 levels of the 2s^22p^3, 2s2p^4, and 2s^22p^23s configurations and from these levels to the next 22 other lowest levels of the 2s2p^4, 2s^22p^23s and 2s^22p^23p configurations have been calculated using a 62-level Breit-Pauli R-matrix approach with orthogonal radial functions and a 47-level Breit-Pauli R-matrix approach with nonorthogonal radial functions. A B-spline basis has been used for the description of continuum functions, and no orthogonality constraint has been imposed between the continuum functions and the valence atomic orbitals in 47-level calculation. Oscillator strengths and transition probabilities for the fine-structure transitions have been calculated using nonorthogonal orbitals in the multiconfiguration Hartree-Fock approach. The present oscillator strengths normally compare very well with a previously available calculation. The collision strength is averaged over a Maxwellian velocity distribution to obtain the effective collision strengths as a function of electron temperature. The effective collision strengths are presented over a wide temperature range ( 2X10^3 to 10^5 K) suitable for modeling of astrophysical plasmas.}, author = {Tayal, S. S. }, citeulike-article-id = {2858497}, journal = {The Astrophysical Journal Supplement Series}, keywords = {atomic\_collisions}, month = {July}, pages = {331--348}, posted-at = {2008-06-03 09:10:49}, priority = {2}, title = {Oscillator Strengths and Electron Collision Rates for Fine-Structure Transitions in OII}, url = {http://www.journals.uchicago.edu/doi/full/10.1086/513107?cookieSet=1}, volume = {171}, year = {2007} }

TY - JOUR ID - citeulike:2858497 L3 - citeulike-article-id:2858497 TI - Oscillator Strengths and Electron Collision Rates for Fine-Structure Transitions in OII JF - The Astrophysical Journal Supplement Series VL - 171 SP - 331 EP - 348 N2 - Electron impact excitation collision strengths for the fine-structure transitions between the lowest 13 levels of the 2s^22p^3, 2s2p^4, and 2s^22p^23s configurations and from these levels to the next 22 other lowest levels of the 2s2p^4, 2s^22p^23s and 2s^22p^23p configurations have been calculated using a 62-level Breit-Pauli R-matrix approach with orthogonal radial functions and a 47-level Breit-Pauli R-matrix approach with nonorthogonal radial functions. A B-spline basis has been used for the description of continuum functions, and no orthogonality constraint has been imposed between the continuum functions and the valence atomic orbitals in 47-level calculation. Oscillator strengths and transition probabilities for the fine-structure transitions have been calculated using nonorthogonal orbitals in the multiconfiguration Hartree-Fock approach. The present oscillator strengths normally compare very well with a previously available calculation. The collision strength is averaged over a Maxwellian velocity distribution to obtain the effective collision strengths as a function of electron temperature. The effective collision strengths are presented over a wide temperature range ( 2X10^3 to 10^5 K) suitable for modeling of astrophysical plasmas. KW - atomic_collisions AU - Tayal, SS PY - 2007/07// UR - http://www.journals.uchicago.edu/doi/full/10.1086/513107?cookieSet=1 ER -