Beam-Foil-Gas Spectroscopy: A Technique for Studying Steady-State Non-Equilibrium Processes.

摘要

When a thin foil is inserted in the beam of a beam-gas experiment the beam particle state populations are driven far from their beam-gas equilibrium values. Downstream from the foil the 'new beam' and gas species interact to produce a new equilibrium, usually different from the beam-gas one. Experimental results are presented to demonstrate this effect and show how relative cross-section measurements can be used to study the beam-foil interaction.