Essays about: "Scattering kernels"

Found 4 essays containing the words Scattering kernels.

1. 1. Path integrals in Quantum Mechanics and their application to low-dimensional supersymmetry

   University essay from Uppsala universitet/Teoretisk fysik

   Author : Gaétan Kaouadji; [2023]
   Keywords : Path integrals quantum mechanics quantum field theory supersymmetry;

   Abstract : This report aims to give an insight to the path integral formalism in quantum mechanics. After explaining the kernel's construction, some of its properties and ways to compute it, we see how it relates to the Schrödinger picture. Moreover, we see how its representation can change if it is defined in the space, momentum, time or energy space. READ MORE

3. 2. Modeling of Low-Energy Neutron Scattering in Liquid Hydrogen Using NCrystal

   University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/European Spallation Source ESS AB; Lunds universitet/Kärnfysik

   Author : Tim Günter; [2022]
   Keywords : ESS; European Spallation Source; neutron; scattering; moderator; liquid hydrogen; modeling; ncrystal; njoy; Physics and Astronomy;

   Abstract : The European Spallation Source ESS, under construction in Lund, Sweden, aims to produce high-brightness and intensity neutrons for a multitude of experiments upon completion. An efficient production of neutrons requires elaborate understanding of the moderation process which slows the neutrons from relativistic speed to a kinetic energy of meV. READ MORE

4. 3. Scattering Kernel Calculations for Liquid Para-Hydrogen Using Ring Polymer Molecular Dynamics

   University essay from Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

   Author : Pontus Nordin; [2020]
   Keywords : Neutron scattering; Para-hydrogen; Scattering kernels; Molecular dynamics; Ring polymer molecular dynamics; ESS; Physics and Astronomy;

   Abstract : The European Spallation Source will be a world leading neutron source available for a range of neutron scattering experiments in the scientific community. In order to accurately simulate the production of cold and thermal neutrons, an accurate calculation of the neutron cross section for the moderator materials is needed. READ MORE

5. 4. Estimation of Relative Seismic Velocity Changes Around Katla Volcano, Using Coda in Ambient Seismic Noise

   University essay from Uppsala universitet/Institutionen för geovetenskaper

   Author : Frida Jonsdottir; [2018]
   Keywords : Katla volcano; Iceland; ambient seismic noise; coda waves; relative velocity variations; Katla vulkan; Island; omgivande seismiskt brus; codavågor; relativa hastighetsvariationer;

   Abstract : Relative seismic velocity variations in the Earth’s crust can be estimated by using ambient seismic noise records from a pair of stations. Velocity variations can be caused by stress perturbations in the subsurface. Therefore, information on stress changes in the crust can possibly be retrieved from measured velocity variations in the medium. READ MORE