Monitoring Neutron Radiation in Extreme Gamma/X-Ray Radiation Fields

Area of Science:

• Nuclear physics and instrumentation
• Radiation detection and measurement

Background:

• Monitoring neutron radiation across a vast dynamic range (10^-3 to 10¹⁴ #/cm²-s) is critical for nuclear energy, security, medicine, and research.
• Existing neutron sensors face saturation and interference issues in high photon (gamma and X-ray) fields, hindering accurate measurements.
• The wide spread of radiation dose (10¹⁶:1) and harsh environmental conditions (high temperature, pressure, humidity) present significant detection challenges.

Purpose of the Study:

• To address the challenges of sensing ultra-low to high neutron radiation in the presence of extreme photon backgrounds.
• To compare the state-of-the-art neutron detection technologies with a novel Tensioned Metastable Fluid Detector (TMFD) approach.

Main Methods:

• Review and comparison of existing neutron sensing technologies.
• Focus on the physics-based principles of the novel Tensioned Metastable Fluid Detector (TMFD).
• Evaluation of TMFD performance under simulated extreme gamma radiation conditions (≈10³ R/h).

Main Results:

• The Tensioned Metastable Fluid Detector (TMFD) demonstrates physics-based, 100% gamma-blind detection capabilities.
• TMFD exhibits high intrinsic efficiency (60-95%) for detecting neutrons via alpha-fission events.
• The detector maintains performance even under extremely high gamma radiation levels, overcoming limitations of conventional sensors.

Conclusions:

• The Tensioned Metastable Fluid Detector (TMFD) technology offers a significant advancement for neutron radiation monitoring in challenging environments.
• TMFD provides a robust solution for accurately measuring neutron radiation, even when overwhelmed by intense gamma radiation.
• This technology has broad applicability in nuclear energy, special nuclear material security, nuclear medicine, and high-energy physics research.