No abstract available

[en] We analyze e^±e^- → e^±e^- 2jets processes considering the effect of the U-boson which is the orthogonal color gauge partner to the photon in the broken color gauge theory. The U-boson effect decreases considerably the differences between the broken color gauge theory and QCD. However, the differences between two models are still large. (Author)

[en] This bibliography deals mainly with binary and ternary collisions involving electrons, photons, and heavy particles (i.e., atoms, molecules, and ions). The energy range covered for each kind of collision is such that the interactions might be described as electronic, atomic, or chemical--higher-energy collisions involving nuclear forces are not treated. Also covered are particle and photon impact on surfaces, the passage of particles and radiation through bulk matter, and transport phenomena in gases. Practically all of the references cited are data compilations, other bibliographies, review articles, or books. The main objective is to provide easy access to atomic collision data, although some references are included principally for their tutorial value

No abstract available

[en] Employing a simple analytic model, we demonstrate that electrons oscillating in a Penning trap may drain the energy stored in an active medium. For this process to happen, the electrons must become bunched, and the energy imparted to these electrons allows them to leave the trap resulting in a train of bunches, their angular frequency corresponding to the medium's resonance

[en] An appropriate representation of the apparent generalized oscillator strength (AGOS) permits the demonstration of its general properties. We show that only the zero-angle trajectory connects continuously the threshold energy E=ω and the high energy E=∞ corresponding to the optical oscillator strength limit of the AGOS. Far-reaching implications, including the normalization of the measured differential cross sections and the identification of their spurious behavior, are discussed and demonstrated using transitions in H, Li, and Ba. (c) 2000 The American Physical Society

No abstract available

[en] The available theoretical data for the electron excitation of atoms and positive ions were reviewed at an assessment meeting held in Abingdon in March 1992. The need for such a meeting both to follow earlier meetings and in view of the forthcoming ESA/NASA SOHO mission is described. The scope of the meeting, its objectives, and the division of tasks among the participants are detailed. To preclude needless repetition in the individual review articles, terms such as collision strength, effective collision strength, and rate coefficient are defined. Discussion points that arose frequently throughout the meeting are summarized. 15 refs., 2 tabs

[en] The currently available data for electron impact excitation of the iron ions, Fe I-Fe VIII, are assessed and listed according to their sources. Methods and approximations employed and the transitions considered are also given. 21 refs., 1 fig., 3 tabs

[en] Using a two-parameter arrangement, the outgoing electrons resulting from electron bombardment of an atom were detected together with emitted photons and their dependence on electron and photon energies for fixed detector angles were determined. Simultaneously measured by this method were the triply differential cross-section of e-n bremsstrahlung, e-e bremsstrahlung, and the doubly differential cross-section of K-shell ionization