helike_kvil93he.dat

• Spontaneous Emission: He⁺⁰(i) → He⁺⁰(j) + hv
• Electron Impact Excitation: He⁺⁰(i) + e → He⁺⁰(j) + e
• Free Electron Recombination: He⁺¹(i) + e → He⁺⁰(j)

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  A-values are taken from Wiese, Smith & Glennon  NBS-NSRDS

  Dipole & non-dipole transitions from the 1(1)S follow
     (i)   preferred curves from comparative graphs up to the n=4 shell
           strongly influenced by experiments of
           Westerfeld  (1979) J. Phys. B. 12,115
           Van Zyl et al.(1980) Phys. Rev. A22, 1916
           Heddle & Gallagher (1989) Rev.Mod.Phys. 61, 221,
           Born limits and to a lesser extent by
           Fujimoto (1978) IPPJ-AM-9.
           Unpublished 29 state R-matrix calculations of Berrington et
           al. (1990) have been used in association with Heddle &
           Gallagher to correct the low temp values up to 10eV of
           1(1)S - 3(1)D, 1(1)S - 3(1)P

  Dipole & non-dipole transitions from the 2(1)S & 2(3)S states follow
     (i)   Fujimoto (1978) IPPJ-AM-8. Non-dipole Born limits from
           Flannery, Morrision & Richmond (1975) J.Appl.Phys. 46, 1186

  Dipole transitions within the n=3,4 shells
     (i)   Impact parameter approximation


  Spin change data follow
     (i)   Kato (1989) At. Data & Nucl. Data Tables 42,313  for
           transitions 1(1)S - 2(3)S and 1(1)S - 2(3)P
     (ii)  Berrington et al. (1985) J. Phys. B. 18, 4147 for
           transitions 2(3)S - 2(1)S,  2(3)S - 2(1)P,
           2(1)S - 2(3)P & 2(3)P - 2(1)P at low temperature and
           follows a similar decay to high temperature as the Kato data
     (iii) For 1(1)S - 3(3)L , the data of Berrington et al.
           is used for low temperature and then the shape of the
           Kato curves above 5eV scaled to match Berrington at 5eV.
     (iv)  For 1(1)S - 4(3)L , 1/n**3 scaling is used from the n=3
           data.


                                                H.P. Summers, Mar. 1991


  Update:

  Dipole transitions between 2(1)P - n=3,4 and 2(3)P - n=3,4 added.
      (i)  Impact parameter approximation


                                                H.P. Summers, Jan. 1992
  Update:

  A complete revision of excitations from 1(1)S and 2(3)S, 2(1)S has
  taken place in association with FOM-KVI (R. Hoekstra, F de Heer,
  H-F Folkerts) making use also of recent Belfast R-matrix data.  The
  new data has replace the older data above where there is ovelap.
  The new preferred cross-section data is archived as
             JETSHP.KVI.DATA(EXC#HE0A) - excitation from 1(1)S
             JETSHP.KVI.DATA(EXC#HE0B) - excitation from 2(1)S, 2(3)S
  The rate parameters are produced in ADF04 format by the codes
             JETSHP.COPASE.FORT(NEUTQUAD)  and
             JETSHP.COPASE.FORT(NEUTQD2)   respectively.


                                                H.P. Summers, June 1993


  Update:

  Attention has been drawn to errors in some A-values in the dataset by
  Mathias Brix.   The corrections are as follow:
              15-14 trans.  A-value  4.15E-05 -> 4.15E+03
              17-15 trans.  A-value  8.15E-10 -> 8.15E-02
              19-13 trans.  A-value  5.79E-04 -> 5.79E+04
              19-16 trans.  A-value  5.70E-07 -> 5.70E+01
              18-16 trans.  A-value  3.63E-10 -> 3.63E-02
  The errors occurred in transcription from the Wiess, Smith, Glennon
  tables by Summers.  These very small A-values have no impact on 
  neutral helium population calculations.  The following change has
                9- 4 trans.  A-value  7.08E+07 -> 7.06E+07
  has also been made matching the NIST-DAS tabulation.

                                             H.P. Summers, 29 Jan. 1997
 Update:
          Added correct termination block ("  -1  -1")
          Allan Whiteford, 17-Aug-06

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  Radiative recombination data is prepared using code

           JETSHP.DLS.FORT(ADASRRC)     on dataset
           JETSHP.RADREC.HLIKE(HE1LS)

  H P Summers  July 1992.

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     Dielectronic data is post-processed from Badnell files as follows:

          /JETSHP.BADNELL.HLIKE(HE1LS12)

     The cross-referencing file is as follows:

          /JETSHP.BADNELL.XREFDAT(HE0L)

     The parent metastable indices are as follows:

     1.    1S1                 (2)0( 0.5)

     Dielectronic data added to  19 existing rad. recom. level sets

                                             03/09/93
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Contributors

• Keith Berrington
• Hugh Summers
• Kernfysisch Versneller Instituut
• Allan Whiteford
• Nigel Badnell