belike_dcg03#c2.dat

• Spontaneous Emission: C⁺²(i) → C⁺²(j) + hv
• Electron Impact Excitation: C⁺²(i) + e → C⁺²(j) + e

 + 2         6         3        386241.0(2S)
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     From a 238 term R-matrix with pseudo states (RMPS) calculation.         
     The close-coupling expansion included the 90 spectroscopic terms        
     arising from the configurations 2s2, 2s2p, 2p2, 2s3l, 2s4l,             
     2s5l, 2p3l, 2p4l, and 2p5l.  In addition it, included the 148           
     pseudo-state terms arising from the configurations 2snl with            
     n = 6 to 12 and l = 0 to 4, and 2pnl with n = 6 to 8 and l = 0          
     to 4.  The spectrospic orbitals (1s - 5g) were determined from          
     local potentials using Slater-type orbitals.  The pseudo orbitals       
     were generated from a set of non-orthogonal Laguerre orbitals           
     that were then orthogonalized to the spectroscopic orbitals and         
     to each other.  The screening parameters for the Laguerre orbitals      
     were adjusted both to improve the agreement between the experimental    
     and theoretical term energies for all terms through 2s5l and to         
     obtain a good distribution of pseudo states above and below the         
     ionization limit.  In STG3 of the R-Matrix calculation, the term        
     energies were adjusted to the experimental values.                      
                                                                             
     For all LSPI partial waves from L=0 to 12, we performed an RMPS         
     calculation with exchange.  For the LSPI partial waves from L=13        
     to 40, we performed a no-exchange 44-term R-matrix calculation          
     without pseudo states, for which the configuration-interaction          
     expansion of the target employed all 238 terms included in the          
     close-coupling expansion of the RMPS calculation.  These partial        
     waves were then topped up.  The size of the continuum basis was 50      
     and the size of the R-matrix "box" was 35.0 au. In the resonance        
     region of the calculation, we used an energy mesh spacing of            
     5.28e-04 Ryd; above all thresholds of the 2s5l configurations, we       
     employed an energy-mesh spacing of 6.96e-02 Ryd up to a total energy    
     of 14 Ryd.  The radiative rates were determined from an LS-coupling     
     configuration-interaction expansion that employed all 238 terms         
     included in the close-coupling expansion for the RMPS calculation.      
                                                                             
     The numbers in the last column of the above table are the theoretical   
     values for the reduced effective collision strengths in the infinite    
     temperature limit as defined in Burgess and Tully Astron. Astrophys.    
     254 436 (1992).                                                         

        Donald C. Griffin                 October 14, 2002         

     D. M. MITNIK, D. C. GRIFFIN, C. P. BALLANCE & N. R. BADNELL 
     J.PHYS.B36 717-30 (2003).

     
     Remove the hidden carriage returns which cause xxdata_04 to fail.

     Martin O'Mullane, 15-04-2004
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Contributors

• Don Griffin
• Nigel Badnell
• Connor Ballance
• Martin O'Mullane