Affiliation:
1. College of Materials Science and Engineering Nanjing University of Aeronautics and Astronautics Nanjing 211106 China
2. Northwest Institute of Nuclear Technology Xi'an 710024 China
3. School of Materials Science and Engineering Xiangtan University Xiangtan Hunan 411105 China
4. School of Physics Science and Engineering Tongji University Shanghai 200092 China
5. School of Chemistry and Physics and Centre for Materials Science Queensland University of Technology (QUT) Brisbane 4000 Australia
Abstract
AbstractState‐of‐the‐art thermal neutron scintillation detectors rely on rare isotopes for neutron capture, lack stability and scalability of solid‐state scintillation devices, and poorly discriminate between the neutron and gamma rays. The boron nitride (BN)‐CsPbBr3perovskite nanocomposite aerogel scintillator enables discriminative detection of thermal neutrons, features the largest known size (9 cm across), the lowest density (0.17 g cm−3) among the existing scintillation materials, high BN (50%) perovskite (1%) contents, high optical transparency (85%), and excellent radiation stability. The new detection mechanism relies on thermal neutron capture by10B and effective energy transfer from the charged particles to visible‐range scintillation photons between the densely packed BN and CsPbBr3nanocrystals. Low density minimizes the gamma ray response. The neutrons and gamma rays are discriminated by complete decoupling of the respective single pulses in time and intensity. These outcomes open new avenues for neutron detection in resource exploration, clean energy, environmental, aerospace, and homeland security applications.
Funder
National Natural Science Foundation of China
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
2 articles.
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