[en] Second order corrections to the mass radius of ¹⁶O were estimated using ordinary perturbation series on a harmonic oscillator basis and including 20 major shells

[en] The realistic soft core two nucleon interaction proposed by Gogny, Pires and de Tourreil is such that it is no necessary to have recourse to Brueckner theory in treating n-body problems. Therefore, ordinary perturbation theory is used to calculate the equilibrium properties (i.e. binding energy, density radius and separation energy) of ¹⁶O, ⁴⁰Ca, ⁹⁰Zr and ²⁰⁸Pb

[en] The realistic soft core two nucleon interaction proposed by Gogny, Pires and de Tourreil (1970) is such that it is not necessary to have recourse to Brueckner theory in treating n-body problems. Therefore ordinary perturbation theory has been used to calculate the equilibrium properties (i.e. binding energy, density, radius and separation energy) of ¹⁶O, ⁴⁰Ca, ⁹⁰Zr and ²⁰⁸Pb. (Auth.)

[en] GEANT3 is a computer program which has been designed for the needs of Particle Physics experiments. We summarize two of the main components of such a program: the geometrical description of the detectors and the simulation of the particle-matter interactions. (author)

[en] The authors have developed an interface between the Cad system Euclid and Geant which allows to build geometries from the powerful graphical and interactive Euclid capabilities. Those geometries can be absorbed in Geant. Vice versa the geometries defined by Geant can be exported to Euclid

[en] We discuss an implementation of Photo Absorption Ionisation model describing ionisation energy loss produced by a relativistic charged particle in very thin absorbers. The implementation allows us to calculate ionisation energy losses in any material consisting of elements with atomic numbers in the range 1-100. Comparisons of simulation with the experimental data from gaseous and solid state detectors are presented

[en] The electron transport algorithm implemented in Geant4 has been recently revised. The modifications concern several physics aspects of the simulation model: the step limitation, the energy loss along a step and the multiple scattering. The Fano cavity setup was used to test these developments. The upgrades increase significantly the accuracy of the electron transport simulation. The ratio of simulated to theoretical dose deposition in the cavity is stable to ∼1% while varying several parameters and within ∼1.5% of the expected value for water and graphite. Work is underway to identify and resolve the remaining shift

[en] When high affinity Ca(2+)-binding proteins like calmodulin, or proteins with a high Ca(2+)-binding capacity like calsequestrin, underwent sodium dodecyl sulfate-gel electrophoresis in Laemmli systems, their electrophoretic migration rates were much higher in gels containing 1 mM Ca2+ than in gels containing ethylene glycol bis(beta-aminoethyl ether) N,N'-tetraacetic acid (EGTA). Replacement of EGTA by Ca2+ in the gel, combined with the blotting of electrophoretically separated proteins on polyvinylidene difluoride membranes and subsequent 45Ca2+ overlay, proved a very effective means of detecting Ca(2+)-binding proteins. This combined approach is important since artifacts occur in both techniques when used separately. We found that the usual procedure of adding Ca2+ to the sample before electrophoresis without including it in the gel itself permitted the detection of only very high affinity Ca(2+)-binding proteins

[en] Recent progress in development of single and multiple scattering models within the Geant4 toolkit is presented. Different options available to users are discussed. The comparisons with the data are shown. The trade of precision versus CPU performance is discussed with the focus on LHC detectors simulation.

[en] We have compared a new model used in GEANT4 for multiple scattering and the model based in the Moliere theory used in GEANT3 with the data collected in the L3 detector for the case of muons of momentum around 45 GeV. We have found some disagreement in the case of GEANT3 but a good matching to the data in the case of GEANT4. (orig.)