slike_al97#fe10.dat

• Spontaneous Emission: Fe⁺¹⁰(i) → Fe⁺¹⁰(j) + hv
• Electron Impact Excitation: Fe⁺¹⁰(i) + e → Fe⁺¹⁰(j) + e

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 Date :Tue Oct 21, 1997
 File generated by Alessandro Lanzafame using C2ADAS
 (conversion from CHIANTI 1.01 database) 

 Ionisation potential from ~adas/adf04/copmm#26/ic#fe10.dat

 References (from CHIANTI 1.01 data files):

 Energy levels:  
   energy levels(12,13,41): Jupen et al., MNRAS, 264, 627, 1994
   energy levels:  NIST Database for Atomic Spectroscopy, Version
     1.0, NIST Standard Reference Database 61, 1995.
   theoretical energy levels: Bhatia & Doschek (1996), to be published

  (Peter Young)...
     Have had problems with the identification of some of the Fe XI
     lines. The following are proprosed.

     Level 37 has been proprosed as giving the 188.30 line (Jupen et
     al.). Don't think this is right, as the 3P2 - 3S1 transition is
     quite weak. Can not find any lines which correspond to the 3S1
     transitions, so have put the scaled superstructure value in.

     Level 38 (3P2) is identified from the strong line at 188.23.

     Level 39 (1P1) is identified as the strong line at 188.30.

     There's only one line from level 40 (3P0), whose identification
     I'm uncertain about (near 189.10 AA?). Have used the scaled 
     superstructure energy relative to the 3P1 level.

     Level 41 (3P1) has been identified from the 184.704 line seen by
     Jupen et al., two other transitions from this level match up
     nicely with the 189.123 and 189.733 lines seen by Behring et
     al.(1976).
     ...(Peter Young)

 Oscillator strengths: 
   A values: obtained from a 13 configuration model of Fe XI used
     in "superstructure"
   produced as part of the Arcetri/Cambridge/NRL atomic data base
     collaboration 'CHIANTI'
     by P.R. Young  Feb. 1996.
   comment:
     The configurations used were:

	3s2 3p4, 3s 3p5, 3s2 3p3 3d, 3p6
	3s2 3p3 {4s, 4p, 4d, 4f}
	3s 3p4 3d, 3s2 3p2 3d2
	3p5 3d, 3s 3p3 3d2, 3s2 3p 3d3

     The most striking difference between this model and the 4 conf
     model occurs for the (2D*) 3P1, 3S1 and 1P1 levels. Essentially,
     the 3S1 level is pushed closer to the other two levels,
     increasing the amount of interaction between them. The data
     below, from "superstructure" shows this.

     The first column gives the levels; the second and third the
     theoretical energies for the 4 conf model and the 13 conf model;
     the next three columns give the percentage contributions of the
     three levels to each other: "a/b" means a is percentage for 4
     conf model, while b is percentage for 13 conf model.

				3S1	3P1	1P1
	3S1	532878	547264	97/71	-/-	-/10
	3P1	555764	553263	1/14	50/42	11/7
	1P1	564755	542936 	-/12	21/16	17/16

     Clearly the change of energies gives rise to different
     interactions. Most notably, 1P1 starts mixing with 3S1, whereas
     it did not before

 Collision strengths:
   Bhatia & Doschek, unpublished (1996)
   produced as part of the Arcetri/Cambridge/NRL atomic data base
      collaboration 'CHIANTI'
      by P.R. Young  Feb. 1996.
   comment:
      Have fitted selected transitions. The errors in neglecting the other
      transitions are <1% for the ground levels and <10% for the metastables.
   
      The metastable levels are 14,20,23,24,25,30.
   
      This file contains fits to the SCALED Bhatia omega data. It was
      found that the 4 configuration collisional model does not
      accurately predict some important collision strengths, so it was
      decided to scale all the 3s2 3p2 - 3s2 3p 3d collision strengths
      (for which there was a corresponding oscillator strength) by the
      factor:
   
   	(accurate "superstructure" oscillator strength)
   	-----------------------------------------------
   	     (original Bhatia oscillator strength)
   
      In particular, this improves the agreement of the 188.22, 188.30 lines
      with theory.
   
      Note it was necessary to "correct" the 3s2 3p2 - 3s 3p3 transitions.

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Contributors

• Alessandro Lanzafame
• CHIANTI