Resolved Specific Ion Data Collections

Temperature Range
0.086 eV → 17.23 eV


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  • Spontaneous Emission: Be+0(i) → Be+0(j) + hv
  • Electron Impact Excitation: Be+0(i) + e → Be+0(j) + e
1s2 2s2 1S0.0 0.0 cm-1
1s2 2s1 2p1 3P4.0 21980.0 cm-1
1s2 2s1 2p1 1P1.0 42565.0 cm-1
1s2 2s1 3s1 3S1.0 52081.0 cm-1
1s2 2s1 3s1 1S0.0 54677.0 cm-1
1s2 2p2 1D2.0 56882.0 cm-1
1s2 2s1 3p1 3P4.0 58908.0 cm-1
1s2 2p2 3P4.0 59696.0 cm-1
1s2 2s1 3p1 1P1.0 60187.0 cm-1
1s2 2s1 3d1 3D7.0 62054.0 cm-1
1s2 2s1 3d1 1D2.0 64428.0 cm-1
1s2 2s1 4s1 3S1.0 64506.0 cm-1
1s2 2s1 4s1 1S0.0 65245.0 cm-1
1s2 2s1 4p1 3P4.0 66812.0 cm-1
1s2 2s1 4p1 1P1.0 67035.0 cm-1
1s2 2s1 4d1 3D7.0 67942.0 cm-1
1s2 2s1 4f1 3F10.0 68241.0 cm-1
1s2 2s1 4f1 1F3.0 68242.0 cm-1
1s2 2s1 4d1 1D2.0 68781.0 cm-1

     From a 280 term R-matrix with pseudo states (RMPS) calculation.
     The close-coupling expansion included the 54 spectroscopic terms
     arising from the configurations 2s2, 2s2p, 2p2, 2s3l, 2s4l,
     2p3l, 2p4l.  In addition it, included the 226 pseudo-state
     terms arising from the configurations 2snl with n = 5 to 11 and
     l = 0 to 4, and 2pnl with n = 5 to 10 and l = 0 to 4.  The
     spectrospic orbitals (1s - 4f) 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 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

     For all LSPI partial waves from L=0 to 11, we performed an RMPS
     calculation with exchange.  For the LSPI partial waves from L=12
     to 20, we performed a no-exchange RMPS calculation.  This was then
     supplemented with a no-exchange 29-term R-matrix calculation
     (all 19 terms listed here plus the ten 2s5l terms) for which
     the configuration-interaction expansion of the target employed
     all 280 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 45 and the size of the
     R-matrix "box" was 71.7 au. In the resonance region of the
     calculation, we used an energy mesh spacing of 3.5e-04 Ryd;
     above all thresholds of the 2s5l configurations, we
     employed an energy-mesh spacing of 9.7e-3 Ryd up to a total
     energy of 2.5 Ryd.  The radiative rates were determined from
     an LS-coupling configuration-interaction expansion that employed
     all 280 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).

     NAME: C Ballance & D Griffin      DATE: July 22, 2003


  • Connor Ballance
  • Don Griffin
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