zewil steeping for second NOBEL prize

[alaa basiony]

zewil was able to develop a 4D ultrafast electron microscopy, whose capability imparts another dimension to imaging in general and to dynamics in particular. We demonstrate its versatility by recording images and diffraction patterns of crystalline and amorphous materials and images of biological cells. The electron packets, which were generated with femtosecond laser pulses, have a de Broglie wavelength of 0.0335 Å at 120 keV and have as low as one electron per pulse. With such few particles, doses of few electrons per square ångstrom
applications:
1- Atomic-Scale Imaging in Real and Energy Space Developed in Ultrafast Electron Microscopy
2- systematic theoretical study of structural dynamics for a substrate and an adsorbate is presented and compared with experimental results of ultrafast electron crystallography. Using the harmonic lattice model of a chain of atoms, including anharmonic forces, we investigate influences of the impulsive force on the temporal behavior of Bragg diffraction; the roles of damping and anharmonicity are also discussed. Extensive simulations are made in order to gain an understanding of the controlling factors of the atomic motions in the substrate, with or without the adsorbate. The results elucidate the importance of coherent wave propagation in the nonequilibrium regime and provide the atomic-scale description of surface and bulk dynamics. The influence of the attenuation length of the impulsive force and the thickness of the substrate (adsorbate) are also considered. For adsorbates, the mismatch of force constants and the coupling with the substrate are examined, thus establishing the conditions for wave-type propagation.
***** zewil thus approve Einstein theory about god equation

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[XFady]

بجد حاجة تفرح
ربنا يوفقه و ياخد نوبل تانية و يدخل التاريخ مع كوري و سانجر

[dr/samr]

بجد جميل اوي
ربنا يوفقه يارب ويقدر يحقق نوبل التانيه