Alexander Braatz

ORCID: 0000-0003-3141-3919
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About
Contact & Profiles
Research Areas
  • Molten salt chemistry and electrochemical processes
  • Nuclear reactor physics and engineering
  • Radioactive element chemistry and processing
  • Analytical chemistry methods development
  • Nuclear Materials and Properties
  • Lanthanide and Transition Metal Complexes
  • Radiation Therapy and Dosimetry
  • Nuclear and radioactivity studies
  • Advanced Fiber Optic Sensors
  • Fusion materials and technologies
  • Nuclear Physics and Applications
  • Extraction and Separation Processes
  • Metabolomics and Mass Spectrometry Studies
  • Zeolite Catalysis and Synthesis
  • Solid-state spectroscopy and crystallography
  • Graphite, nuclear technology, radiation studies
  • Seismic Waves and Analysis
  • 3D Printing in Biomedical Research
  • Metallurgical Processes and Thermodynamics
  • Pigment Synthesis and Properties
  • Ultrasonics and Acoustic Wave Propagation
  • Chemical Thermodynamics and Molecular Structure

Oak Ridge National Laboratory
2016-2023

University of California, Irvine
2014-2016

Irvine Valley College
2016

The coordination of the trivalent 4f ions, Ln = La<sup>3+</sup>, Dy<sup>3+</sup>, and Lu<sup>3+</sup>, with neutral acidic organophosphorus reagents, both individually combined, was studied by use X-ray absorption spectroscopy.

10.1039/c6dt04305d article EN Dalton Transactions 2016-12-24

The resurgence of the molten-salt nuclear reactors (MSRs) creates interesting problems in chemistry. As MSRs operate, composition and physical properties salts change because fission corrosion. Since Cr is principal corrosion product NaCl a common constituent, we studied atomic structure molten NaCl–CrCl3. We found networks CrCl63– octahedra an intermediate-range order with nonmonotonic temperature behavior remarkable agreement between measurements ab initio simulations. Even though results...

10.1021/acsaem.0c02678 article EN cc-by-nc-nd ACS Applied Energy Materials 2021-03-16

With an increased interest in the use of molten salts for energy generation, obtaining thermophysical properties salt mixtures becomes critical understanding performance and behavior. Density is one significant systems. This work presents density measurement chloride using neutron imaging. was performed at Oak Ridge National Laboratory High-Flux Isotope Reactor. Resulting densities as a function temperature different from this were compared with calculated values Redlich–Kister modeling....

10.1021/acs.iecr.2c02967 article EN Industrial & Engineering Chemistry Research 2022-11-18

The microvasculature system is critical for the delivery and removal of key nutrients waste products significantly damaged by ionizing radiation. Single-cell capillaries structures are primary cause circulatory dysfunction, one that results in morbidities leading to progressive tissue organ failure premature death. Identifying tissue-specific biomarkers predictive extent damage will aid developing medical countermeasures treating individuals exposed In this pilot study, we developed tested a...

10.3390/mi12080904 article EN cc-by Micromachines 2021-07-29

ABSTRACTUnderstanding the formation of uranium alloys with steel is important to advance nuclear technologies involving U metal fuels and machining metal, for forensics applications. No known phase diagram quaternary U-(M = Fe, Ni, Cr) system exists. We synthesize samples U-304 L (nominal composition 70.1:18.3:10.4 at% Fe:Cr:Ni) across range 4.45—63.35 at%U by arc melting under inert conditions. Using binary UFe as a reference, we identify four U-steel alloy phases. find U-Fe analogue phases...

10.1080/00223131.2023.2252823 article EN Journal of Nuclear Science and Technology 2023-09-19

Previously, a fused-quartz acoustic waveguide named the suspended core with tight-field confinement in small diameter was developed and its sensing potential harsh environment demonstrated fabricated periodic fiber Bragg grating. In this paper, sensor exposed to around 70 Gy/h gamma radiation at room temperature for 3550 h Oak Ridge National Laboratory. For comparisons, thermocouple two optical gratings were tested under same conditions. The central frequency reading of found encounter...

10.1109/jsen.2021.3063288 article EN IEEE Sensors Journal 2021-03-02
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