The emission of circularly polarized photons during the scattering of fast spin-polarized electrons from heavy nuclei is studied within the Dirac–Sommerfeld-Maue approach. Predictions are made for the dependence of the polarization correlations C32 and C12 on collision energy, photon energy and nuclear charge. A comparison with pilot measurements of the transmission asymmetry, sensitive to C32,...

These experiments investigate the decomposition mechanisms of geminal dinitro energetic materials by photolytically generating two key intermediates: 2-nitropropene and 2-nitro-2-propyl radicals. To characterize the unimolecular dissociation of each intermediate, we form them under collision-free conditions using the photodissociation of 2-bromo-2-nitropropane; the intermediates are formed at h...

We review the software tools and models used in High Energy Physics to describe elementary particle interactions, with emphasis on those which would be most appropriate for application to the field of Cosmic Ray Physics. We discuss the standard Monte Carlo programs in common use and various specialised modifications, ranging from the modelling of very high energy interactions to softer processe...

We review the software tools in High Energy Physics which may also be appropriate for use in the field of Cosmic Ray Physics. We describe the status and future plans for Object-Oriented (OO) Data Storage and Access; Event and Detector simulation, including physics generators and GEANT4; and the HEP class libraries for generic tasks such as data presentation, statistical and numerical analysis, ...