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  • 1 University of Gent Department of Sub-atomic and Radiation Physics Proeftuinstraat 86 9000 Gent (Belgium)
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A two parameter correlation system to measure the energy of a thermalizing ortho-positronium as function of its age was constructed. The Doppler broadening of the 2 annihilation line due the quenching ofo-Ps is measured in coincidence with the age of the positronium. We use only one high resolution nuclear ADC for the energy spectrum, together with a self build low resolution ADC for the timing information and an integrated logical unit. In this way, AMOC (Age Momentum Correlation) becomes possible with small extra expenses.