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3 results for “Gamma-Ray Emission”
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Research ArticleOpen accessIn the keywordsExtragalactic Diffuse Cascade Emission as a Probe of Processes in Active Galactic NucleiAnna Vladimir UrysonIn this study, we discuss possible imprint of source characteristics on extragalactic diffuse cascade emission that is initiated by ultra-high energy cosmic rays propagating through the universe. The common opinion is that cosmic ray sources are active galactic nuclei. Based on cascade emission analyses we demonstrate that possibly a new subclass of cosmic ray sources exists, a particle flux from … …Space Science International, Vol. 5, Issue 1 · 25 Feb 2024 · 8,382 accessesView PDFCite
Research ArticleOpen accessIn the abstractModern Propulsions for Aerospace-Part IIRelly Victoria Virgil Petrescu, Raffaella Aversa, Bilal Akash et al.Speaking about a new engine ionic means to speak about a new aircraft. The paper presents in a short time the actual engines ion chambers (called the ion thrusters) and other new ionic motors proposed by the authors. The engine (ionic propulsion unit of ions, that accelerates the positive ions through a potential difference) is approximately ten times more efficient … …Journal of Aircraft and Spacecraft Technology, Vol. 1, Issue 1 · 25 Apr 2017 · 8,118 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordThe Impact of XRF-Escape on Energy Resolution of NaI: Tl Scintillation Detectors for Medical Imaging or Gamma-Ray SpectroscopyRaffaele Scafè, Marco Puccini, Rosanna Pellegrini, Roberto PaniThe effect of escape of X-ray fluorescence from scintillator elemental components on the detector energy resolution is investigated from a spectroscopic standpoint, for monolithic and pixelated crystals. Along with these, any other emissions in a given region of interest were also considered. In present spectral evaluations a range of ratios between the areas of the peaks (XRFesc) to (XRFesc + … …American Journal of Applied Sciences, Vol. 21, Issue 1 · 10 Jul 2024 · 5,024 accessesView PDFCite