Anharmonic nuclear motion in charge-density studies

Modeling Magnetic Field in Heavy ion Collisions Using Two Different Nuclear Charge Density Distributions

By studying the properties of matter during heavy-ion collisions, a better understanding of the Quark-Gluon plasma is possible. One of the main areas of this study is the calculation of the magnetic field, particularly how the values of conductivity affects this field and how the field strength changes with proper time. In matching the theoretical calculations with results obtained in lab, two diffe...

Nuclear-Charge Screening in Positronium Formation from Helium Atoms

An analytical treatment of the electron screening effect within an active-electron model is given for positronium formation from helium atoms. A first-order distorted wave approximation with correct boundary conditions is applied to evaluate the transition amplitude. In the range of impact energy for which the introduced perturbative approach is valid, both the total and differential cross sect...

Anharmonic effects on charge and orbital order.

Two Common Sources of Systematic Errors in Charge Density Studies

Resolution independent residuals ) ( / ) ( o c o I I I σ ς − = should not show any discontinuities, when plotted against the resolution . The density of reflections per resolution range, however, changes with resolution, which limits the information value from these plots. Residuals plotted against ranked resolution values, should be uniform and are easy to interpret. These plots of individual ...

More about systematic errors in charge-density studies.

In order to detect and graphically visualize the absence or presence of systematic errors in fit data, conditional probabilities are employed to analyze the statistical independence or dependence of fit residuals. This concept is completely general and applicable to all scientific fields in which model parameters are fitted to experimental data. The applications presented in this work refer to ...