Highly efficient electron-stimulated desorption of benzene from amorphous solid water ice

作者：Thrower J D^*; Collings M P; Rutten F J M; McCoustra M R S

来源：Chemical Physics Letters, 2011, 505(4-6): 106-111.

DOI：10.1016/j.cplett.2011.02.029

The desorption of benzene (C(6)H(6)) from the surface of compact amorphous solid water (ASW) during irradiation with electrons in the range 100-350 eV has been investigated. Two desorption components, with particularly large cross-sections, were present in the observed desorption signal. The fast component, with a cross-section of > 10(-15) cm(2), is attributed to desorption of isolated C(6)H(6) molecules that are pi-hydrogen bonded to small clusters of water (H(2)O) molecules on the compact ASW surface. The slower component, with a cross-section of ca. 10(-16) cm(2), is attributed to a more complex desorption process involving larger C(6)H(6) islands on the compact ASW surface. Possible desorption mechanisms are discussed.

• 出版日期2011-3-30