An angular study of the He++H2→HeH++H* reaction at 20 eV (c.m.) collision energy

Ion-molecule reactions are studied inside large (approximately equal to 10(4) atoms) very cold (0.37 K) superfluid (4)He droplets by mass spectrometric detection of the product ions. He+ ions initially formed inside the droplets by electron impact ionization undergo charge transfer with either embedded D(2), N(2), or CH(4). For D(2) this charge transfer process was studied in detail by varying the pickup pressure. For either N(2) or CH(4) the reagent ions were formed by this charge transfer and the reaction pathways of the secondary reactions N(2) (+)+D(2), CH(4) (+)+D(2), and CH(3) (+)+D(2) each with an additionally embedded D(2) molecule were also determined from the pickup pressure dependencies. In several cases, notably He.N(2) (+) and CH(3)D(2) (+) reaction intermediates are observed. The analysis is facilitated by the tendency for molecular ion products to appear without (or with only very few) attached He atoms whereas the atomic ion products usually appear in the mass spectra with several attached He atoms, e.g., He(m).D+ ions with up to m=19.

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An angular study of the He++H2→HeH++H* reaction at 20 eV (c.m.) collision energy

Cited by 6 publications

References 15 publications

Angular and energy analysis of HeH+ products from the charge exchange excitation reaction

Angular and energy analysis of HeH+ products from the charge exchange excitation reaction

Diabatic excited states of the (HeH2)+ molecular ion for the charge exchange-excitation reaction: He+ + H2 → HeH+ + H∗

Ion-molecule reactions in He4 droplets: Flying nano-cryo-reactors

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