| Abstract: | The influence of vibrational excitation of molecules on negative-ion formation in bulk and in surface is analyzed. The magnetron method is used to study the influence of laser emission on the formation of negative ions of the molecules SF 6 and 12. The SF 6 molecules were excited by absorption of C02-1aser emission in the v 3 band. The 12 molecules were excited by Stokes scattering of the second harmonic of a neodymium laser. It is shown that the cross section for dissociative capture in the presence of vibrationally excited 12 molecules is increased by 3-4 orders. With SF~ molecules vibrationally excited in the beam, studies were made of the effects of formation of negative ions from a hot polycrystallinetungsten filament. The physics of the influence of vibrational excitation on negative-ion formation on a surface is analyzed. The maximum sensitivities of methods of vibrationally excited molecules are estimated.Translated from Lazernye Sistemy, pp. 121–142 1982. |
