The processes of radiation damping and decoherence in Quantum Electrodynamics are studied from an open system’s point of view. Employing functional techniques of field theory, the degrees of freedom of the radiation field are eliminated to obtain the influence phase functional which describes the reduced dynamics of the matter variables. The general theory is applied to the dynamics of a single...

For radiation therapy with carbon ion beams, either for the stable isotope (12)C or for the radioactive one (11)C, it has been demonstrated that the beta(+)-activity distribution created or deposited, respectively, within the irradiated volume can be visualized by means of positron emission tomography (PET). The PET images provide valuable information for quality assurance and precision improve...

As synchrotron radiation (SR) facilities are rapidly being designed and built all over the world, the radiological considerations should be weighed carefully at an early stage in the design of the facility. This necessitates the understanding and identification of beam losses in the machines, especially the storage ring. The potential sources of radiation are photons and neutrons from loss of i...

In a laser produced plasma (LPP), the temperature and density profile and history are determined by the laser energy absorbed by the plasma. Therefore, it is extremely important that the absorption coefficients are calculated accurately when modeling LPP's. We have compared the inverse bremsstrahlung absorption coefficients of the radiation-hydrodynamic code Hyades [1] with the non-LTE atomic k...

The energy dependence of the total hadronic cross sections is caused by gluon bremsstrahlung which we treat nonperturbatively. It is located at small transverse distances about 0.3 fm from the valence quarks. The cross section of gluon radiation is predicted to exponentiate and rise with energy as s(delta) with delta = 0.17+/-0. 01. The total cross section also includes a large energy independe...