Abstract
AbstractA new Age‐Momentum Correlation apparatus has been built for the purpose of studying Positronium‐Gas scattering. This apparatus uses a HPGe detector to perform time‐resolved Doppler Broadening Studies on positronium in a gas environment. With this information, the thermalization process can be studied by observing the energy as a function of time. Modelling the rate of thermalization can then be used to extract a momentum transfer cross‐section. Improved data rate and energy resolution over previous measurements that used Doppler broadening methods have been obtained. More importantly, the simultaneous acquisition of both time and energy spectra allow for systematic checks that were not available to previous experiments. Preliminary results are presented. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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