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Gas-Thermal Spraying Synthesis of β-GaO Luminescent Ceramics.
Materials (Basel)
December 2024
Joint Institute for High Temperatures, Russian Academy of Sciences, 125412 Moscow, Russia.
This paper presents the initial results of the synthesis of β-GaO luminescent ceramics via plasma gas-thermal spraying synthesis, where low-temperature plasma of an argon and nitrogen mixture was employed. A direct current electric arc generator of high-enthalpy plasma jet with a self-aligning arc length and an expanding channel of an output electrode served as a plasma source. The feedstock material consisted of a polydisperse powder of monocrystalline β-GaO with particle sizes ranging from 5 to 50 μm.
View Article and Find Full Text PDFInfluence of spatial redistribution of heterogeneities in proton beam characteristics.
Phys Med
January 2025
Department of Medical Physics, Apollo Proton Cancer Centre, 100 Feet Road Taramani, Chennai, Tamil Nadu, India. Electronic address:
Objectives: The purpose of this study was to investigate the fundamental properties of spot-scanning proton beams and compare them to Monte Carlo (MC) simulations, both with and without CT calibration, using spatially diverse combinations of materials.
Methods: A heterogeneous phantom was created by spatially distributing titanium, wax, and thermocol to generate six scenarios of heterogeneous combinations. Proton pencil beams ranging in energy from 100 to 226.
Exploring the performance of a DOI-capable TOF-PET module using different SiPMs, customized and commercial readout electronics.
Phys Med Biol
January 2025
CERN, Geneva, Switzerland.
Time resolution is crucial in positron emission tomography (PET) to enhance the signal-to-noise ratio and image quality. Moreover, high sensitivity requires long scintillators, which can cause distortions in the reconstructed images due to parallax effects. This study evaluates the performance of a time-of-flight (TOF)-PET module that makes use of a single-side readout of a4×43.
View Article and Find Full Text PDFFirst Retrospective QA of FAST-01 Clinical Treatment Fields Using High-Speed Quantitative Scintillation Imaging.
Int J Radiat Oncol Biol Phys
December 2024
Cancer and Blood Diseases Institute, Cincinnati Children's Hospital; Department of Radiation Oncology, College of Medicine, University of Cincinnati, Cincinnati, Ohio.
Purpose: To retrospectively validate the dose and dose rates delivered in FAST-01 clinical trial fields via submillimeter spatial and <0.25 ms temporal resolution scintillation imaging.
Methods And Materials: An ultrafast intensified CMOS camera (4.
Design and Performance of an InAs Quantum Dot Scintillator with Integrated Photodetector.
Sensors (Basel)
November 2024
College of Nanotechnology, Science and Engineering, University at Albany, Albany, NY 12203, USA.
Article Synopsis
- - A new scintillation material featuring InAs quantum dots in a GaAs matrix was developed and tested for its efficiency with various types of radiation.
- - The research introduced a design methodology for an integrated photodetector with low defect density, optimizing its performance to match the quantum dot emission spectrum using a specialized buffer layer.
- - Results showed the detector's electron yield for α-particles and photons, with alpha particles yielding 13 electrons/keV and photons yielding between 30-60 electrons/keV, alongside improved radiation hardness of InAs QDs in AlGaAs compared to those in GaAs.
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