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The unusual structure of Li11, the first halo nucleus found, is analyzed by the Preparata model of nuclear structure. By applying Coherent Nucleus Theory, we obtain an interaction potential for the halo-neutrons that rightly reproduces the fundamental state of the system., Comment: 9 pages Submitted to International Journal of Modern Physics E (IJMPE)

We present a few simple observations on the occurrence of $\pi$-condensation in Nuclei, aimed at clarifying the nature of the $\pi$-condensation implied by the coherent nuclear $\pi$-N-$\Delta$ interaction, proposed in 1990 to explain the puzzling emergence of the Shell-Model. We show that such condensation is totally unrelated to the one proposed by A. B. Migdal at the beginning of '70, which can easily be shown not to occur at the normal nucleon density $\rho_{N}\simeq$ 0.17 fm${}^{-3}$., Comment: 9 pages, no figures

We show that the coherent oscillations of the e.m. field induced by the collective quantum fluctuations of the nuclear matter field associated with the giant resonances, with frequencies $\omega_{A}\simeq 78A^{-{1/3}}$ MeV, give rise to a significant $(e^+e^-)$ pair production in high energy Heavy Ion collisions. The approximate parameterless calculation of such yield is in good agreement with recent experimental observations., Comment: 27 pages, 13 figures