A novel modular neutron long counter for ({\alpha},n) reactions

TL;DR

This paper introduces a new modular, transportable neutron detector designed for ({ extalpha},n) reactions, featuring a flat energy response up to 10 MeV through innovative optimization of its components.

Contribution

The work presents a novel design methodology for a neutron detector with energy-independent response, using thermal neutron absorbers to optimize efficiency.

Findings

Successful prototype characterization demonstrating flat response up to 10 MeV

Design methodology enabling energy-independent neutron detection

Potential applications in ({ extalpha},n) reaction measurements

Abstract

In this work, we present the design of a new modular and transportable neutron detector for ({\alpha},n) reactions. The detector is based on the use of several 3He-filled proportional counters embedded in high density polyethylene. In order to provide the detector with a response independent of the neutron energy, a flat response, an innovative design methodology has been applied. The method is based on the optimization of the counters contribution to the total efficiency by using thermal neutron absorbers. This allows to obtain flat responses up to 10 MeV. The characterization of a proof-of-concept prototype detector is presented. The perspectives for using this new detector for ({\alpha},n) reactions measurements are discussed.