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Excitation of the 1s5 and 1s4 levels of neon by low-energy electrons

Technical Report ·
OSTI ID:5586197
Excitation coefficients for production of 1s4 levels (Paschen notation) of neon in collisions with low-energy electrons have been measured using drift tube technique combined with laser absorption and laser-induced fluorescence techniques. The absorption and fluorescence signals were analyzed using coupled rate equations which include the effects of population mixing among these levels in collisions with neon atoms. The excitation coefficients for the metastable and resonance levels alpha sub mv/N and alpha sub r/N were obtained as functions of the electric field to gas density ratio E/NM. The measured values of alpha m/N vary from 1.3X10/sup -24/ m2 at E/N = 1.6X10/sup 21/ Vm/sup 2/ to 6.5X1-10/sup 22/ m2 at 3.0X10/sup 19/ V m/sup 2/. The values of alpha sub r/N are comparable in the experimental E/N range. The experimental excitation coefficients are in agreement with values calculated from a Boltzmann analysis using a recommended set of electron excitation cross sections derived from published experimental electron beam data.
Research Organization:
Joint Inst. for Lab. Astrophysics, Boulder, CO (USA)
OSTI ID:
5586197
Report Number(s):
AD-A-186955/1/XAB
Country of Publication:
United States
Language:
English