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1.
Vacuum ultraviolet silicon photomultipliers applied to BaF22 cross-luminescence detection for high-rate ultrafast timing applications / Gundacker, S (CERN ; Milan Bicocca U.) ; Pots, R H (CERN ; Aachen, Tech. Hochsch.) ; Nepomnyashchikh, A (Irkutsk State U.) ; Radzhabov, E (Irkutsk State U.) ; Shendrik, R (Irkutsk State U.) ; Omelkov, S (Tartu, Inst. Phys.) ; Kirm, M (Tartu, Inst. Phys.) ; Acerbi, F (Fond. Bruno Kessler, Povo) ; Capasso, M (Fond. Bruno Kessler, Povo) ; Paternoster, G (Fond. Bruno Kessler, Povo) et al.
Inorganic scintillators are widely used for fast timing applications in high-energy physics (HEP) experiments, time-of-flight positron emission tomography and time tagging of soft and hard x-ray photons at advanced light sources. As the best coincidence time resolution (CTR) achievable is proportional to the square root of the scintillation decay time it is worth studying fast cross-luminescence, for example in BaF2 which has an intrinsic yield of about 1400 photons/MeV. [...]
2021 - 18 p. - Published in : Phys. Med. Biol. 66 (2021) 114002 Fulltext: PDF;
2.
On the use of CdSe scintillating nanoplatelets as time taggers for high-energy gamma detection / Turtos, R M (CERN) ; Gundacker, S (CERN ; Milan Bicocca U.) ; Omelkov, S (Tartu, Inst. Phys.) ; Mahler, B (ILM, Lyon) ; Khan, A H (U. Gent (main)) ; Saaring, J (Tartu, Inst. Phys.) ; Meng, Z (ILM, Lyon) ; Vasil'ev, A (SINP, Moscow) ; Dujardin, C (ILM, Lyon) ; Kirm, M (Tartu, Inst. Phys.) et al.
The technological challenge imposed by the time resolution essential to achieve real-time molecular imaging calls for a new generation of ultrafast detectors. In this contribution, we demonstrate that CdSe-based semiconductor nanoplatelets can be combined with standard scintillator technology to achieve 80 ps coincidence time resolution on a hybrid functional pixel. [...]
2019 - Published in : npj 2D Mater. Appl. 3 (2019) 37 Fulltext: PDF;
3.
Intraband luminescence excited in new ways: Low-power x-ray and electron beams / Omelkov, Sergey I (Tartu U.) ; Nagirnyi, Vitali (Tartu U.) ; Feldbach, Eduard (Tartu U.) ; Turtos, Rosana Martinez (Milan Bicocca U.) ; Auffray, Etiennette (CERN) ; Kirm, Marco (Tartu U.) ; Lecoq, Paul (CERN)
Hot intraband luminescence (IBL) was observed under excitation by high-power (120 keV, 10 A/cm2) pulsed electron beam, low-energy (10 keV) and low-current (2 μA) continuous electron beam as well as pulsed x-rays. Thus, the fundamental possibility of IBL excitation by x-rays was confirmed, and for most studied materials the absence of the dependence of IBL spectral shape on excitation energy was revealed. [...]
2017 - 7 p. - Published in : J. Lumin. 191 (2017) 61-67

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