The energy levels, oscillator strengths, and electron impact collision strengths are calculated for the Xe
10+ ion using the configuration interaction scheme implemented by the Flexible Atomic Code. ...These data pertain to the 3917 levels belonging to the following configurations:
4
s
2
4
p
6
4
d
8
,
4
s
2
4
p
6
4
d
7
4
f
,
4
s
2
4
p
6
4
d
7
5
l
(
l
=
s, p, d, or f),
4
s
2
4
p
5
4
d
9
,
4
s
2
4
p
5
4
d
8
4
f
,
4
s
2
4
p
5
4
d
8
5
l
,
4
s
2
4
p
6
4
d
6
5
s
5
p
,
4
s
2
4
p
6
4
d
6
5
p
5
d
. Configuration interactions among these configurations are included in the calculation. Collision strengths are obtained at 10 scattered electron energies (1–1000
eV) and are tabulated here at five representative energies of 10, 50, 100, 500, and 1000
eV. Effective collision strengths are obtained by assuming a Maxwellian electron velocity distribution at 10 temperatures ranging from 10 to 100
eV, and are tabulated at five representative temperatures of 10, 30, 50, 70 and 100
eV in this work. The whole data set should be useful for research involving extreme ultraviolet emission from Xe
10+.
The opacity of iron plasma in local thermodynamic equilibrium is studied using an independently developed detailed level accounting model. Atomic data are generated by solving the full relativistic ...Dirac-Fock equations. State mixing within one electronic configuration is considered to include part of the correlations between electrons without configuration interaction matrices that are too large being involved. Simulations are carried out and compared with several recent experimental transmission spectra in the M- and L-shell absorption regions to reveal the high accuracy of the model. The present model is also compared with the OPAL, LEDCOP and OP models for two isothermal series at T = 20 eV and T = 19.3 eV. It is found that our model is in good agreement with OPAL and LEDCOP while it has discrepancies with OP at high densities. Systematic Rosseland and Planck mean opacities in the range 10-1000 eV for temperature and 10{sup -5}-10{sup -1} g cm{sup -3} for density are also presented and compared with LEDCOP results, finding good agreement at lower temperatures but apparent differences at high temperatures where the L- and K-shell absorptions are dominant.
The effects of configuration interaction (CI) on the energy levels and oscillator strengths of
Au
11
+
have been investigated by systematically adding configurations included in calculations. Four ...sets of calculations, namely, a single configuration Dirac–Fock type, CI with singly, doubly, and triply electron excitations from the ground configuration of
Au
11
+
have been carried out to show the effects. The results show that CI not only affects distribution of the oscillator strengths among one transition array, but also affects the distributions among different transition arrays. For example, the converged oscillator strengths for transition arrays of
5
p
→
5
d
(e.g.
5
p
6
→
5
p
5
5
d
and
5
p
5
5
d
→
5
p
4
5
d
2
) are greatly reduced compared with the results of single configuration approximation. On the other hand, for transition arrays of
4
f
→
5
d
(e.g.
5
p
6
→
4
f
13
5
d
and
5
p
5
5
d
→
4
f
13
5
p
5
5
d
2
), the converged oscillator strengths are drastically enhanced. The CI effects result in the net transfer of oscillator strengths from transition arrays of
5
p
→
5
d
to
4
f
→
5
d
.
Electron impact excitation of Ca-like iron Fe 6 Zeng, Jiaolong; Liang, G. Y.; Zhao, G. ...
Monthly notices of the Royal Astronomical Society,
02/2005, Letnik:
357, Številka:
2
Journal Article
Electron impact excitation of Ca-like iron Fe6 Zeng, Jiaolong; Liang, G. Y.; Zhao, G. ...
Monthly notices of the Royal Astronomical Society,
02/2005, Letnik:
357, Številka:
2
Journal Article
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