Zum Mechanismus der Spaltfragment-induzierten Desorption / About the Mechanism of Fission-Fragment Induced Desorption

The desorption of even big molecular ions after the passage of fission fragments is described by a short-lived collective perturbation of the surface potential, which is primarily caused by an excitation of the electron plasma. In secondary ion mass spectroscopy and laser induced desorption similar perturbations occur. These processes can be described microscopically as emission of thermally activated ions out of bound states by the time-dependent perturbation, and macroscopically as a temporary lowering of the electrochemical surface potential