# Conceptual design and first results for a neutron detector with interaction localization capabilities

## TL;DR

This paper introduces the NEXT neutron detector array, designed for high-precision neutron detection and localization, with promising initial experimental results demonstrating its capabilities.

## Contribution

The paper presents a novel segmented neutron detector with interaction localization, combining high efficiency and gamma discrimination, supported by simulation and prototype testing.

## Key findings

- Successful prototype construction and testing
- Effective neutron-gamma discrimination achieved
- Promising initial measurements with neutron sources

## Abstract

A new high-precision detector for studying neutrons from beta-delayed neutron emission and direct reaction studies is proposed. The Neutron dEtector with Xn Tracking (NEXT) array is designed to maintain high intrinsic neutron detection efficiency while reducing uncertainties in neutron energy measurements. A single NEXT module is composed of thin segments of plastic scintillator, each optically separated, capable of neutron-gamma discrimination. Each segmented module is coupled to position sensitive photodetectors enabling the high-precision determination of neutron time of arrival and interaction position within the active volume. A design study has been conducted based on simulations and experimental tests leading to the construction of prototype units. First results from measurements using a $^{252}$Cf neutron source and accelerator-produced monoenergetic neutrons are presented.