Effect of incoming radiation on the non-LTE spectrum of Xe at Te = 100 eV

Details Effect of incoming radiation on the non-LTE spectrum of Xe at Te = 100 eV Effect of incoming radiation on the non-LTE spectrum of Xe at Te = 100 eV

2011-04-21

arxiv.org/abs/1104.4248v1

High Energy Dens.Phys. 7:98-104,2011

Physics

Atomic Physics

Scientific paper

10.1016/j.hedp.2011.03.004

The effect of a diluted Planckian radiation field on a Xe gas at the electron temperature of 100 eV is investigated within the framework of a Collisional Radiative Model, using the HULLAC code. The atomic model spans 19 charge states, includes 20 375 configurations and contains more than 2 10^6 levels. We have simulated detailed spectra comprising more than 10^9 transitions with the Mixed UTA model. The radiation temperature Tr is varied from 0 to 1.5 Te. The dilution factor, D, applied to decrease the radiation field, is varied independently from 0 to 3 at fixed Tr = Te. In both cases, the average charge state Z* increases from 15 to 27, but in different ways. It is shown that even a dilution D = 0.01 changes Z* by more than 1.5. Different combinations of Tr and D yielding exactly the same Z*, may give line ratios sufficiently different to be observed. This fact is explained by the interplay of the shape of the radiation field and the atomic structure.

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