Bi-Po alpha source for the calibration and functional testing of silicon detectors: Preparation and characterisation.

Silicon detectors are widely used in space radiation dosimeter systems for measuring energetic charged particles. Calibration of such systems is usually performed with protons and heavier ions in high energy particle accelerators. For preliminary energy calibration and functional testing of silicon detectors, at any time during the development, an equipment producing a thin Bi-Po alpha particle emitting source was designed and constructed.

Tetrahedrality and hydrogen bonds in water.

We carried out extensive calculations of liquid water at different temperatures and pressures using the BK3 model suggested recently [P. T. Kiss and A.

Efficient Handling of Gaussian Charge Distributions: An Application to Polarizable Molecular Models.

We present a mesh-based Ewald summation method that is suitable for the calculation of the electrostatic interaction between Gaussian charge distributions, instead of point charges. As an application, we implemented the method in the Gromacs simulation package and tested it with a polarizable water model, showing that the interaction between Gaussian charge distributions can be computed with a small (10%) additional computational cost with respect to the point charge case. In addition, since the performance of polarizable models is strongly influenced by the number of iterations required for the self-consistent field solution, we tested also the Always Stable Predictor-Corrector (ASPC) method of Kolafa (Kolafa, J.

A new polarizable force field for alkali and halide ions.

We developed transferable potentials for alkali and halide ions which are consistent with our recent model of water [P. T. Kiss and A.

A systematic development of a polarizable potential of water.

Based on extensive studies of existing potentials we propose a new molecular model for water. The new model is rigid and contains three Gaussian charges. Contrary to other models, all charges take part in the polarization of the molecule.