Measurement of charge-transfer-rate coefficients of ground-state He+ with N2 and CH4 at electron-volt energies

Details Measurement of charge-transfer-rate coefficients of ground-state He+ with N2 and CH4 at electron-volt energies Measurement of charge-transfer-rate coefficients of ground-state He+ with N2 and CH4 at electron-volt energies

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000phrva..62d2709f&link_type=abstract

Physical Review A (Atomic, Molecular, and Optical Physics), Volume 62, Issue 4, October 2000, id.042709

Physics

2

Charge Transfer, Ion-Molecule, Ion-Ion, And Charge-Transfer Reactions, Optical Cooling Of Atoms, Trapping, Atomic Processes And Interactions

Scientific paper

The rate coefficients for the dissociative charge-transfer reaction of He++N2--> products and He++CH4--> products are measured using ion storage. Helium ions were produced by electron bombardment of helium gas. The ion population in the trap was measured as a function of the storage time to give the reaction rate. The rate coefficient for He+ and N2 is 1.07(+/-0.11)×10-9 cm3 s-1, and the rate coefficient for He+ and CH4 is 1.73(+/-0.29)×10-9 cm3 s-1. The equivalent temperature for the two reactions was estimated to be 8700 and 8000 K, respectively. Our results are essentially the same as those obtained previously at 300 K.

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