# 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.

## Key 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.

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Source: https://tomesphere.com/paper/1907.10582