Role of vibrationally excited NO in promoting electron emission when colliding with a metal surface: a nonadiabatic dynamic model |
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Authors: | Katz Gil Zeiri Yehuda Kosloff Ronnie |
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Institution: | Department of Physical Chemistry and the Fritz Haber Research Center, the Hebrew University, Jerusalem 91904, Israel. |
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Abstract: | A nonadiabatic quantum dynamic model has been developed to study the process of electron emission from a low-work-function metal surface. The process is initiated by scattering a highly vibrationally excited NO molecule from a surface composed of a Cs layer covering a Ru crystal. The model addresses the increasing quantum yield of the electron emission as a function of the molecular vibrational excitation and incident kinetic energy. The reaction mechanism is identified as a long-range harpooning electron transfer to a molecular ion which is then accelerated toward the surface. Upon impact, the molecular ion emits its excess electron. |
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