Photofission and Quasi-Deuteron-Nuclear State as Mixing of Bosons and Fermions

The empirical-phenomenological quasi-deuteron photofission description is theoretically justified within the semiclassical, intermediate statistics model. The transmutational fermion (nucleon) - boson (quasi-deuteron) potential plays an essential role in the present context and is expressed in terms of thermodynamical and of microscopical quantities, analogous to those commonly used in the superfluid nuclear model.Comment: 7 pages, RevTex, to appear in Zeit. f. Phys.

Launching of non-dispersive sub- and superluminal beams

In this paper we analyze the physical meaning of sub-and superluminal soliton-like solutions (as the X-waves) of the relativistic wave equations and of some non-trivial solutions of the free Schrodinger equations for which the concepts of phase and group velocities have a different meaning than in the case of plane-wave solutions. If we accept the strict validity of the principle of relativity, such solutions describe objects of two essentially different nature: carrying energy wave packets and inertia-free proper phase vibrations. The speeds of the first-type objects can exceed the plane-wave velocity c* only inside media and are always less than the vacuum light speed c. Particularly, very fast sound pulses with speeds c, < v < c have already been launched. The second-type objects are incapable of carrying energy and information but have superluminal speed. If we admit the possibility of a breakdown of Lorentz invariance, pulses described, for example, by superluminal solutions of the Maxwell equations can be generated. Only experiment will give the final answer.113332933