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Related Experiment Video

Updated: Apr 7, 2026

Neutron Radiography and Computed Tomography of Biological Systems at the Oak Ridge National Laboratory's High Flux Isotope Reactor

Neutron Radiography and Computed Tomography of Biological Systems at the Oak Ridge National Laboratory's High Flux Isotope Reactor

Published on: May 7, 2021

Efficient scalable solid-state neutron detector.

¹Center for Polymers and Organic Solids, University of California, Santa Barbara, California 93106-5090, USA.

The Review of Scientific Instruments

|July 3, 2015

Summary

This summary is machine-generated.

We developed a scalable solid-state neutron detector system using lithium-6 foils and silicon diodes for high thermal neutron detection sensitivity. This system meets homeland security requirements for radiological portal monitors.

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Last Updated: Apr 7, 2026

Neutron Radiography and Computed Tomography of Biological Systems at the Oak Ridge National Laboratory's High Flux Isotope Reactor

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Published on: May 7, 2021

$Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2$

Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2

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A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space

Published on: February 1, 2016

Area of Science:

Nuclear instrumentation
Solid-state physics
Neutron detection technology

Background:

High thermal neutron detection sensitivity is crucial for applications like homeland security.
Existing neutron detector systems face challenges in scalability and efficiency.
Solid-state detectors offer potential advantages in terms of size, cost, and reliability.

Purpose of the Study:

To report on a scalable solid-state neutron detector system.
To achieve high thermal neutron detection sensitivity.
To evaluate the system's suitability for homeland security applications.

Main Methods:

The detector system utilizes a basic unit composed of a lithium-6 (6Li) foil coupled to two crystalline silicon diodes.
The intrinsic efficiency of a single detector unit and a stack of five units were theoretically calculated.
The performance of a large-scale detector system was estimated based on measured data from the detector unit.

Main Results:

The theoretical intrinsic efficiency of a single detector unit is 23.8%.
A detector element, a stack of five units, has a theoretical intrinsic efficiency of 60%.
A scaled detector system with an effective area of 0.43 m(2) is estimated to meet minimum efficiency requirements for radiological portal monitors.

Conclusions:

The developed scalable solid-state neutron detector system demonstrates high thermal neutron detection sensitivity.
The system's design, utilizing lithium-6 and silicon diodes, offers a promising solution for neutron detection.
The estimated performance indicates its potential for effective use in homeland security radiological portal monitoring.