A5067700429- High-pressure geophysics and materials
- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Rock Mechanics and Modeling
- Nuclear physics research studies
- Seismic Imaging and Inversion Techniques
- Tunneling and Rock Mechanics
- Geotechnical and Geomechanical Engineering
- Nuclear reactor physics and engineering
- High-Energy Particle Collisions Research
- Quantum, superfluid, helium dynamics
- Seismology and Earthquake Studies
- Drilling and Well Engineering
- Nuclear Physics and Applications
- Gear and Bearing Dynamics Analysis
- Atomic and Molecular Physics
- Anomaly Detection Techniques and Applications
- Geophysics and Gravity Measurements
- Hydrocarbon exploration and reservoir analysis
- Mechanical stress and fatigue analysis
- Metallurgical Processes and Thermodynamics
- Astronomical and nuclear sciences
- Food Industry and Aquatic Biology
- Engineering and Environmental Studies
- High-Velocity Impact and Material Behavior
Ben-Gurion University of the Negev
2019-2023
Brown University
2017-2020
Washington University in St. Louis
2014-2017
University of Oklahoma
2013-2015
University of Maryland, College Park
1981-1982
Lawrence Berkeley National Laboratory
1976-1978
University of California, Berkeley
1976-1978
National Centre for Nuclear Research
1976
Weizmann Institute of Science
1974
Calculated angular and energy distributions of the $\ensuremath{\alpha}$ particles in long-range $\ensuremath{\alpha}$-particle fission are presented. The were obtained from calculated trajectories based on a three-point-charge model for scissioning nucleus. calculation is two dimensional, spontaneous (no preferred direction) assumed. This reduces number free variables system to seven (except mass ratio). thus parametrized terms following initial dynamical variables: distance between...
Abstract Relating seismic anisotropy to mantle flow requires detailed understanding of the development and evolution olivine crystallographic preferred orientation (CPO). Recent experimental field studies have shown that CPO depends strongly on integrated deformation history, which may lead differences in how corresponding should be interpreted. In this study, two widely used numerical models for evolution—D‐Rex VPSC—are evaluated further examine effect history texture anisotropy. Building...
Abstract Intermediate‐depth earthquakes (focal depths 70–300 km) are enigmatic with respect to their nucleation and rupture mechanism the properties controlling spatial distribution. Several recent studies have shown a link between intermediate‐depth thermal‐petrological path of subducting slabs in relation stability field hydrous minerals. Here we investigate whether structural characteristics incoming plates can be correlated seismicity rate. We quantify 17 by estimating maximum fault...
Seismic anisotropy throughout the oceanic lithosphere is often assumed to be generated by fossilized texture formed during deformation at asthenospheric temperatures close ridge. Here we investigate effect of high-temperature and high-pressure static annealing on previously deformed olivine aggregates simulate residence peridotite in lithosphere. Our experiments indicate that orientation magnitude crystallographic preferred (CPO) will evolve due preferential growth grains with low...
Abstract The hydrous mineral talc is stable over a relatively large P‐T field and can form due to fluid migration metamorphic reactions in mafic ultramafic rocks faults along plate boundary interfaces. Talc known be one of the weakest minerals, making it potentially important for deformation dynamics seismic characteristics faults. However, little about talc's mechanical properties at high temperatures under confining pressures greater than 0.5 GPa. We present results experiments on natural...
We calculate for a model nucleus the single-particle excitations in transition from saddle point to scission fission process. The consists of square well potential finite depth filled with noninteracting "protons" and "neutrons." At every stage between shape surface is equal fissioning as predicted by liquid-drop but held constant. rate change nuclear assumed be that dynamical liquid-drop-model calculations Nix. It found this time scale there small probability particles raised levels above...
Abstract The significant viscous anisotropy that results from crystallographic alignment (texture) of olivine grains in deformed upper mantle rocks strongly influences a large variety geodynamic processes. Our ability to explore the effects anisotropic viscosity simulations these processes requires mechanical model can predict magnitude and its evolution. Unfortunately, existing models textural evolution are calibrated for relatively small deformations simple strain paths, making them less...
Abstract Syntectonic microstructural evolution is a well‐known phenomenon in the mantle and lower crust associated with two main processes: grain size reduction through dynamic recrystallization development of crystallographic preferred orientation (CPO). However, effects annealing via static on CPO have been largely overlooked. We investigated by analyzing suite kimberlite‐hosted garnet peridotite xenoliths from Wyoming Craton. focus five that show microstructures reflecting different...
Combined observations from natural and experimental deformation microstructures are often used to constrain the rheological properties of upper mantle. However, relating processes typically requires orders magnitude extrapolation in strain rate due vastly different time scales between nature lab. We examined a sheared peridotite xenolith that was deformed under rates comparable laboratory shearing scales. Microstructure analysis using an optical microscope electron backscatter diffraction...