Temperature effects on the perturber induced shift of dopant ionization energies in He and Ne

[Display omitted] ► Dopant and temperature dependence in Δ D ( ρ P ) is shown to be caused by polarization. ► Quasi-free electron energy V 0 ( ρ P ) in He and Ne is extracted from Δ D ( ρ P ) . ► V 0 ( ρ P ) in low to medium density He and Ne is fitted by the local Wigner–Seitz model. In this Letter...

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Bibliographic Details
Published in:Chemical physics letters 2011-03, Vol.505 (1), p.16-20
Main Authors: Evans, C.M., Lushtak, Yevgeniy, Shi, Xianbo, Li, Luxi, Findley, G.L.
Format: Article
Language:English
Subjects:
DENSITY
ENERGY
GASES
HELIUM
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
IONIZATION
NEON
POLARIZATION
TEMPERATURE DEPENDENCE
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Summary:[Display omitted] ► Dopant and temperature dependence in Δ D ( ρ P ) is shown to be caused by polarization. ► Quasi-free electron energy V 0 ( ρ P ) in He and Ne is extracted from Δ D ( ρ P ) . ► V 0 ( ρ P ) in low to medium density He and Ne is fitted by the local Wigner–Seitz model. In this Letter, temperature effects on the perturber induced shift Δ D ( ρ P ) [ ρ P ≡ perturber number density ] of the dopant ionization energy in the repulsive gases Ne and He are investigated at low to medium perturber number densities (i.e., ρ P ⩽ 6.0 × 10 21 cm - 3 ). We show that these effects arise from changes in the ensemble averaged dopant/perturber polarization energy rather than from changes in the energy of the quasi-free electron.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2011.02.024