Searched for: subject%3A%22Scintillation%22
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van Aarle, C. (author)
doctoral thesis 2024
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van Blaaderen, J.J. (author), Biner, Daniel (author), Krämer, Karl W. (author), Dorenbos, P. (author)
Lead halide perovskites are reportedly a very promising group of materials for scintillation due to their fast sub-nanosecond exciton luminescence, small band-gaps, and high theoretical light yield. Unfortunately, they only show emission at cryogenic temperatures. In this work single crystals of CsPbBr<sub>3</sub> and CsPbCl<sub>3</sub> are...
journal article 2024
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Frijns, Jesper (author)
Laser satellite communications for ground-to-ground and ground-to space links is influenced by atmospheric turbulence. Typically, theoretical models are used to predict link performance and the influence of the atmosphere on variables such as beam wander, spot size and scintillation at the receiver. These variables are used as input for system...
master thesis 2023
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van Aarle, C. (author), Roturier, Nils (author), Biner, Daniel A. (author), Krämer, Karl W. (author), Dorenbos, P. (author)
LaBr<sub>3</sub>:Ce<sup>3+</sup> is a compound with excellent scintillation properties, but its ultraviolet emission does not match well with the detection efficiency curves of silicon based photodetectors. In this work, Sm<sup>2+</sup> is studied as an activator for LaBr<sub>3</sub> as its near-infrared emission can be detected with close to...
journal article 2023
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Penner, Crystal (author), Usherovich, Samuel (author), Niedermeier, Jana (author), Belanger-Champagne, Camille (author), Trinczek, Michael (author), Paulssen, E. (author), Hoehr, Cornelia (author)
In proton therapy, the dose from secondary neutrons to the patient can contribute to side effects and the creation of secondary cancer. A simple and fast detection system to distinguish between dose from protons and neutrons both in pretreatment verification as well as potentially in vivo monitoring is needed to minimize dose from secondary...
journal article 2023
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van der Sar, S.J. (author), Brunner, Stefan (author), Schaart, D.R. (author)
We investigate X-ray photon-counting scintillation detectors with silicon photomultiplier (SiPM) readout. These circumvent some drawbacks of direct-conversion detectors. We measured observed count rate (OCR) versus X-ray tube current for single-pixel detectors consisting of LYSO:Ce and YAP:Ce scintillators coupled to ultrafast SiPMs. For a 30...
journal article 2022
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van Aarle, C. (author), Krämer, Karl W. (author), Dorenbos, P. (author)
Fast energy transfer from Yb<sup>2+</sup> to Sm<sup>2+</sup> is a requirement when using Yb<sup>2+</sup> as a sensitiser for Sm<sup>2+</sup> emission for near-infrared scintillator applications. This cannot be achieved through dipole-dipole interactions due to the spin-forbidden nature of the involved Yb<sup>2+</sup> transition, making the...
journal article 2022
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van der Sar, S.J. (author), Leibold, D. (author), Brunner, Stefan E. (author), Schaart, D.R. (author)
We investigate fast silicon photomultiplier (SiPM)-based scintillation detectors for X-ray photon-counting applications, e.g., photon-counting computed tomography (CT). Such detectors may be an alternative to CdTe/CdZnTe (CZT) and Si detectors, which face challenges related to availability and cost-effective growth of detector-grade material,...
conference paper 2022
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Borghi, G. (author)
Nuclear medical imaging (NMI) is the branch of nuclear medicine aimed at imaging the in-vivo distribution of specific compounds labeled with radioactive elements (radiotracers) inside animals (preclinical applications) or patients (clinical applications). These compounds are developed to follow metabolic pathways or for binding to receptor...
doctoral thesis 2021
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Schaart, D.R. (author), Schramm, Georg (author), Nuyts, Johan (author), Surti, Suleman (author)
The first time-of-flight positron emission tomography (TOF-PET) scanners were developed as early as in the 1980s. However, the poor light output and low detection efficiency of TOF-capable detectors available at the time limited any gain in image quality achieved with these TOF-PET scanners over the traditional non-TOF PET scanners. The...
review 2021
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Khanin, V. (author), Venevtsev, Ivan (author), Chernenko, Kirill (author), Pankratov, Vladimir (author), Klementiev, Konstantin (author), van Swieten, Thomas (author), van Bunningen, Arnoldus J. (author), Vrubel, Ivan (author), Shendrik, Roman (author)
Scintillators based on Ce-doped garnets are regularly co-doped with Mg<sup>2+</sup> or Ca<sup>2+</sup> to form Ce ions in 4+ state and reduce undesired afterglow. However overly high Ce<sup>4+</sup> concentration leads to poor light yield performance. In order to understand the reason for variation in luminescence efficiency of Ce<sup>3+</sup...
journal article 2021
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Schaart, D.R. (author)
The imaging performance of clinical positron emission tomography (PET) systems has evolved impressively during the last ∼15 years. A main driver of these improvements has been the introduction of time-of-flight (TOF) detectors with high spatial resolution and detection efficiency, initially based on photomultiplier tubes, later silicon...
review 2021
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van der Sar, S.J. (author), Brunner, Stefan E. (author), Schaart, D.R. (author)
Purpose: The implementation of photon-counting detectors is widely expected to be the next breakthrough in X-ray computed tomography (CT) instrumentation. A small number of prototype scanners equipped with direct-conversion detectors based on room-temperature semiconductors, such as CdTe and CdZnTe (CZT), are currently installed at medical...
journal article 2021
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Xiong, Chao (author), Xu, Ji Sheng (author), Stolle, Claudia (author), van den IJssel, J.A.A. (author), Yin, Fan (author), Kervalishvili, Guram N. (author), Zangerl, Franz (author)
Transient signal loss of the global positioning system (GPS) has been frequently observed by receivers on board the European Space Agency's Swarm mission when the satellites encounter ionospheric plasma irregularities. In this study we provided the first comparison of the GPS signal amplitude degradations from receivers on board low Earth...
journal article 2020
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Wang, B. (author), Kreuger, R. (author), Huizenga, J. (author), Beekman, F.J. (author), Goorden, M.C. (author)
Photomultiplier tube (PMT)-based scintillation cameras are predominant in molecular imaging but have the drawback that position estimation is severely degraded near the edges (dead edge effect). This leads to sensitivity losses and can cause severe problems in applications like molecular breast imaging and in certain SPECT devices. Using smaller...
journal article 2020
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Wolszczak, W.W. (author)
In many aspects measurement of the α/β ratio has advantages over other methods. It provides higher precision and higher density of excitation than is available with Compton or photoelectric effect electrons. It has been shown that the α/β ratio follows the same trends and patterns as previously found for nonproportionality of electron/ gamma...
doctoral thesis 2019
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Dong, Xichao (author), Hu, Jiaqi (author), Hu, Cheng (author), Li, Y. (author), Sun, Shiyu (author)
The sub-satellite track of geosynchronous synthetic aperture radar (GEO SAR) presents the figure "8" or "O", which causes the great changes of platform motion direction and the different projection of anisotropic irregularities along the line-of-sight (LOS) direction. Due to the almost equal angle velocity to that of Earth, the GEO SAR has...
journal article 2019
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Mao, X. (author), Visser, P.N.A.M. (author), van den IJssel, J.A.A. (author)
The European Space Agency (ESA) Swarm mission is a satellite constellation launched on 22 November 2013 aiming at observing the Earth geomagnetic field and its temporal variations. The three identical satellites are equipped with high-precision dual-frequency Global Positioning System (GPS) receivers, which make the constellation an ideal...
journal article 2018
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Borghi, G. (author), Tabacchini, V. (author), Bakker, P.J. (author), Schaart, D.R. (author)
Recently, a monolithic scintillator detector for time-of-flight (TOF)/depth-of-interaction (DOI) positron emission tomography (PET) was developed. It has a detector spatial resolution of ∼1.7 mm full-width-at-half-maximum (FWHM), a coincidence resolving time (CRT) of ∼215 ps FWHM, and ∼4.7 mm FWHM DOI resolution. Here, we demonstrate, for the...
journal article 2018
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Awater, R.H.P. (author)
Scintillation materials convert high-energy radiation into many visible photons and, in combination with a photodetector, are used as ionizing radiation detectors. Since the discovery of ionizing radiation, there have been intensive research efforts in finding new, better performing scintillators, resulting in the development of a large variety...
doctoral thesis 2017
Searched for: subject%3A%22Scintillation%22
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