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This failure was ascribed to workmanship and design issues, and related to fine metal particles accumulating in the control rods' housing and interfering with their free movement. [ citation needed ] In addition, later testing found that the reactors have a positive power co-efficient of reactivity (PCR), which was in disagreement with the ...
Scilab - free open-source software for numerical computation and simulation similar to MATLAB/Simulink. SDC Verifier - structural design and finite element analysis software with a calculation core for checking structures according to different standards, either predefined or self programmed, and final report generation with all checks.
The hpc lattice (left) and the ccf lattice (right) The principles involved can be understood by considering the most efficient way of packing together equal-sized spheres and stacking close-packed atomic planes in three dimensions. For example, if plane A lies beneath plane B, there are two possible ways of placing an additional atom on top of ...
The concept of lattice energy was originally applied to the formation of compounds with structures like rocksalt and sphalerite where the ions occupy high-symmetry crystal lattice sites. In the case of NaCl, lattice energy is the energy change of the reaction Na + (g) + Cl − (g) → NaCl (s) which amounts to −786 kJ/mol. [2]
This means that X-rays are seemingly "reflected" off parallel crystal lattice planes perpendicular at the same angle as their angle of approach to the crystal with respect to the lattice planes; in the elastic light (typically X-ray)-crystal scattering, parallel crystal lattice planes perpendicular to a reciprocal lattice vector for the crystal ...
There occur as many Madelung constants M i in a crystal structure as ions occupy different lattice sites. For example, for the ionic crystal NaCl, there arise two Madelung constants – one for Na and another for Cl. Since both ions, however, occupy lattice sites of the same symmetry they both are of the same magnitude and differ only by sign.
The dispersion relations show conics of the free-electron energy dispersion parabolas for all possible reciprocal lattice vectors. This results in a very complicated set intersecting of curves when the dispersion relations are calculated because there is a large number of possible angles between evaluation trajectories, first and higher order ...
Merrill Brian Maple (born November 20, 1939) is an American physicist. He is a distinguished professor of physics and holds the Bernd T. Matthias Chair in the physics department at the University of California, San Diego , and conducts research at the university's Center for Advanced Nanoscience.
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