silike_jal10#ar4.dat

• Spontaneous Emission: Ar⁺⁴(i) → Ar⁺⁴(j) + hv
• Electron Impact Excitation: Ar⁺⁴(i) + e → Ar⁺⁴(j) + e

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  The above Maxwellian averaged rate coefficients are from a 220 level Breit-Pauli
  R-matrix calculation containing 24090 transitions. 

  The configurations included in the scattering calculations were:
  3s$^2$3p$^2$, 3s$^2$3p3d - 3s$^2$3p5s, 3s3p$^3$, 3s3p$^2$3d, 3p$^4$, 3s3p3d$^2$       

  The box size was 15.454 au, with 40 (N+1)-electron continuum basis oribitals per
  angular momentum with a maximum Hamiltonian dimension of 46960.
  
  The exchange calculation ran from JMIN=0.5 to JMAX=9.5 and the non-exchange calculation
  ran from JMIN=10.5 to JMAX=37.5

  The outer region calculation was split into two energy regions. Region 1 
  ran from the first excitation threshold up to the ionization threshold
  and region 2 from the ionization threshold to four times the threshold.
  In region 1, the exchange calculation used 40,000 energy points and the non-exchange
  calculation used 400 energy points. In region 2, 200 energy points were used for
  both the exchange and non-exchange calculations.

  Theoretical energies were shifted to experimental NIST energies at stage 3. This caused some
  reordering of the energy levels. Due to shifting to NIST energies, dipole 
  radiative rates were scaled accordingly to be consistent.    
                
  See J A Ludlow et al, J. Phys. B43 (2010), 074029

  DOI: 10.1088/0953-4075/43/7/074029

  NAME : John Ludlow
  DATE : 16th November 2009

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