Achieving Efficient Neutron and Gamma Discrimination in a Highly Stable 6 Li-Loaded Cs 3 Cu 2 I 5 Perovskite Scintillator.
Qian WangCheng'er WangZhihua WangXilei SunMartin NiklXiaoping OuYangYuntao WuPublished in: The journal of physical chemistry letters (2022)
Low-dimensional Cu(I) perovskite halides with efficient exciton emissions have recently emerged as promising scintillation materials for X-ray and gamma-ray detection applications. Here, we demonstrate the possibility of using zero-dimensional Cs 3 Cu 2 I 5 for the sensitive detection of thermal neutrons and neutron-gamma discrimination enabled by Li doping. Single crystals of Cs 3 Cu 2 I 5 doped with 95% enriched 6 Li were grown by the Bridgman method. Cs 3 Cu 2 I 5 : 6 Li offers a compelling combination of high stability against moisture and oxygen, a decent energy resolution of 4.8% for 662 keV 137 Cs gamma-rays, a high light yield of 30 000 photons/MeV for gamma-rays, and 96 000 photons/neutron for thermal neutron, and a good neutron-gamma pulse shape discrimination figure of merit of 2.27. Our discovery of 6 Li-doped low-dimensional perovskite halides opens up a new horizon for stable and high-performance neutron-gamma scintillator design.
Keyphrases
- sensitive detection
- quantum dots
- ion batteries
- metal organic framework
- room temperature
- drug delivery
- aqueous solution
- high efficiency
- magnetic resonance imaging
- high resolution
- solid state
- computed tomography
- magnetic resonance
- loop mediated isothermal amplification
- risk assessment
- label free
- municipal solid waste