Abstract
A new high-precision detector for studying neutrons from beta-delayed neutron emission and direct reaction studies is proposed. The Neutron dEtector with multi-neutron (denoted 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 252Cf neutron source and accelerator-produced monoenergetic neutrons are presented.
| Original language | English |
|---|---|
| Article number | 162528 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
| Volume | 946 |
| DOIs | |
| State | Published - Dec 1 2019 |
| Externally published | Yes |
Funding
This research was sponsored by the U.S. Department of Energy , National Nuclear Security Administration, USA under the Stewardship Science Academic Alliances program through DOE Award No. DE-NA0002934 and DE-NA0002132 and the U.S. Department of Energy Office of Science through DOE Award No. DE-SC0016988 . This research was sponsored by the U.S. Department of Energy, National Nuclear Security Administration, USA under the Stewardship Science Academic Alliances program through DOE Award No. DE-NA0002934 and DE-NA0002132 and the U.S. Department of Energy Office of Science through DOE Award No. DE-SC0016988.
Keywords
- Beta-delayed neutron emission
- Direct reactions
- Neutron detection
- Pulse shape discrimination
- Time of flight