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Showing 1 to 10 of 10 for “"dynamic structure factor"”.
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On the dynamic structure factor for the electron gas
… into a path integral version, then studied its dynamic structure factor S(q,q0 ) systematically. Our study shows that qc defined in RPA not only is the threshold for a bare plasmon, but also in general the one for any number of renormalized plasmons. We have particularly studied large momentum …
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Mean-field theory for the dynamics of superfluid fermions in the BCS-BEC crossover
We use mean-field theory to investigate the dynamics of superfluid fermions. This thesis includes our two works. The first one is to study Josephson oscillations and self-trapping of superfluid fermions in a double-well potential with time-dependent Bogoliubov-de Gennes equations. We investigate …
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Studies of structure and dynamics of biological macro-molecular assemblies by low angle neutron diffraction and inelastic X-ray scattering
… into two parts which focus on the studies of the dynamic structure factor and static inter-particle structure factor respectively. In the first part, we have measured and analyzed the dynamic structure factors of aligned 40 wt% calfthymus Na-DNA molecules with the inelastic X-ray scattering (IXS). …
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Deep inelastic neutron scattering and single particle kinetic energies in condensed noble gases
… National Laboratory was used to measure the dynamic structure factor at values of the wave-vector transfer between 15 and 30 A$\sp{-1}$. Data have been analyzed with resolution techniques, and the single particle kinetic energies have been determined.
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On the Structure and Dynamics of Aluminophosphate Glass-forming Melts measured by Dynamic Light Scattering
I report the results of a series of dynamic light scattering studies of molten aluminophosphate liquids, [Al(PO3)3]x[NaPO3]100-x, obtained by photon correlation spectroscopy. The study covers a range of compositions designed to manipulate the network connectivity of the glass-forming liquid in …
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Analysis of dislocation pipe diffusion in deformed alpha-phase PdHX using a synthesized QENS approach
… method is developed for accurately comparing the dynamic structure factor S_inc(Q,E) data of multiple instruments, using an inverse Fourier transform in order to obtain the intermediate scattering function F_inc(Q,t) for each instrument and simultaneously analyzing the output from three QENS …
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Local Magnetism in Strongly Correlated Electron Systems with Orbital Degrees of Freedom
… the spectrum has many branches, I calculate the dynamic structure factor to find which branches of the spin wave spectrum have the highest intensity. It will be interesting to compare my dynamic structure factor results to single crystal inelastic neutron scattering, which to this point has not …
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Extending the dielectric formalism in warm dense matter: collisions, dynamic structure factors, and stopping powers
… with sophisticated radiation- or magneto- hydrodynamics (R/MHD) codes. In turn, the accuracy of R/MHD simulations rely on detailed descriptions of the material properties like transport coefficients, stopping powers, scattering and absorption spectra, and many other quantities in the WDM regime. …
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Noncollective X-Ray Thomson Scattering Diagnostic Development Based On A Titanium Hybrid X-Pinch X-Ray Source
… show the importance of the ion-ion correlation factor within the total dynamic structure factor and its strong dependence on scattering angle. The FXRTS results were fit with theoretical scattering spectrums created using an XRTS subroutine included in the SPECT3D spectral code suite. …
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Linear and nonlinear edge dynamics and quasiparticle excitations in fractional quantum Hall systems
… we numerically study the linear and non-linear dynamics of the chiral gapless edge modes of fractional quantum Hall Laughlin droplets -- both fermionic and bosonic -- when confined by anharmonic trapping potentials with model short range interactions; anharmonic traps allow us to study the …