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Phase Changes in the Surface Layer of Stainless Steel Annealed at a Temperature of 550 °C.
Materials (Basel)
December 2022
Science and Technology Park, Palacký University, Šlechtitelů 21, 78371 Olomouc, Czech Republic.
Stainless steels have the advantage of forming a protective surface layer to prevent corrosion. This layer results from phase and structural changes on the steel surface. Stainless steel samples (1.
View Article and Find Full Text PDFPARaDIM: A PHITS-Based Monte Carlo Tool for Internal Dosimetry with Tetrahedral Mesh Computational Phantoms.
J Nucl Med
December 2019
Program in Pharmacology, the Radiochemistry and Molecular Imaging Probes Core, and the Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
Mesh-type and voxel-based computational phantoms comprise the current state of the art for internal dose assessment via Monte Carlo simulations but excel in different aspects, with mesh-type phantoms offering advantages over their voxel counterparts in terms of their flexibility and realistic representation of detailed patient- or subject-specific anatomy. We have developed PARaDIM (pronounced "paradigm": Particle and Heavy Ion Transport Code System-Based Application for Radionuclide Dosimetry in Meshes), a freeware application for implementing tetrahedral mesh-type phantoms in absorbed dose calculations. It considers all medically relevant radionuclides, including α, β, γ, positron, and Auger/conversion electron emitters, and handles calculation of mean dose to individual regions, as well as 3-dimensional dose distributions for visualization and analysis in a variety of medical imaging software.
View Article and Find Full Text PDFMultipurpose setup for low-temperature conversion electron Mössbauer spectroscopy.
Rev Sci Instrum
May 2017
Instituut voor Kern- en Stralingsfysica, KU Leuven, 3001 Leuven, Belgium.
We describe an experimental setup for conversion electron Mössbauer spectroscopy (CEMS) at low temperature. The setup is composed of a continuous flow cryostat (temperature range of 4.2-500 K), detector housing, three channel electron multipliers, and corresponding electronics.
View Article and Find Full Text PDFIncorporating X-ray summing into gamma-gamma signature quantification.
Appl Radiat Isot
October 2016
AWE, Aldermaston, Reading, Berkshire RG7 4PR, UK.
A method for quantifying coincidence signatures has been extended to incorporate the effects of X-ray summing, and tested using a high-efficiency γ-γ system. An X-ray library has been created, allowing all possible γ, X-ray and conversion electron cascades to be generated. The equations for calculating efficiency and cascade summing corrected coincidence signature probabilities have also been extended from a two γ, two detector 'special case' to an arbitrarily large system.
View Article and Find Full Text PDFLimited reduction of ferrihydrite encrusted by goethite in freshwater sediment.
Geobiology
July 2016
Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan.
Many physical and chemical processes control the extent of Fe(III) oxyhydroxide reduction by dissimilatory Fe(III)-reducing bacteria. The surface precipitation of secondary Fe minerals on Fe(III) oxyhydroxides limits the extent of microbial Fe(III) reduction, but this phenomenon has not yet been observed in nature. This paper reports the observation of secondary Fe-mineral (goethite) encrustation on ferrihydrite surface within freshwater sediment up to 10 cm deep.
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