High Resolution Studies of Electron Attachment to Molecules
In this paper, we survey recent progress in studies of anion formation via (dissociative) electron attachment (DEA) to simple molecules, as measured with the laser photoelectron attachment (LPA) method at high resolution. The limiting (E→ 0) threshold behavior of the cross sections is elucidated for s-wave and p-wave attachment. Cusps at onsets for vibrational excitation (VE), due to interaction of the DEA channnel with the VE channel, are clearly detected, and vibrational Feshbach resonances just below vibrational onsets are observed for molecules with sufficiently strong long-range attraction between the electron and the molecule. From the LPA anion yields, absolute DEA cross sections (energy range typically E=0.001 -2 eV) are determined with reference to rate coefficients for thermal electron attachment at the appropriate gas temperature (normally TG = 300 K). The experimental data are compared with theoretical cross sections, calculated within the framework of an R-matrix or an Effective Range theory approach.
Electron attachment Cross section Anion formation R-matriz calculation
M.Braun M.-W.Ruf I.I.Fabrikant H.Hotop
Fachbereich Physik, Technische Universitat Kaiserslautern, 67653 Kaiserslautern, Germany Fachbereich Physik, Technische Universitat Kaiserslautern, 67653 Kaiserslautern, Germany Department
国际会议
北京
英文
39-48
2008-10-27（万方平台首次上网日期，不代表论文的发表时间）