Coincident Measurement of the Energy Spectra of Doppler-Shifted Annihilation Gamma Quanta and Positron-Induced Secondary Electrons

TL;DR

This paper reports preliminary results from a new positron beam system designed to measure Doppler-shifted annihilation gamma rays and secondary electrons simultaneously, advancing understanding of positron interactions.

Contribution

Introduction of a novel positron beam system capable of coincident energy measurements of gamma rays and electrons for detailed positron interaction analysis.

Findings

Data analysis shows successful detection of coincident gamma rays and electrons.

System demonstrates potential for precise Doppler shift measurements.

Preliminary results validate the feasibility of the new measurement approach.

Abstract

Preliminary results are presented from a new positron beam system currently under development at the University of Texas at Arlington for the coincident energy measurement of Doppler-shifted annihilation quanta and positron-induced Auger electrons. We report data based on an analysis of the pulses resulting from the detection of positron induced secondary electrons by a micro-channel plate detector in coincidence with the pulses resulting from the detection of associated annihilation gamma rays in a NaI(Tl) gamma detector.