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  • 1
    Electronic Resource
    Electronic Resource
    Collective modes in a slab of interacting nuclear matter (1994)
    Springer
    The European physical journal 348 (1994), S. 17-23 
    Details
    ISSN: 1434-601X
    Keywords: 21.60.Jz ; 68.15.+e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We consider a slab of nuclear matter and investigate the collective excitations, which develop in the response function of the system. We introduce a finiterange realistic interaction among the nucleons, which reproduces the full G-matrix by a linear combination of gaussian potentials in the various spin-isospin channels. We then analyze the collective modes of the slab in theS=T=1 channel: for moderate momenta hard and soft zero-sound modes are found, which exhaust most of the excitation strength. At variance with the results obtained with a zero range force, new “massive” excitations are found for the vector-isovector channel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291647
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A model for cluster confinement in one dimensional many-body systems (1992)
    Springer
    The European physical journal 341 (1992), S. 327-337 
    Details
    ISSN: 1434-601X
    Keywords: 12.35.−i ; 12.35.−Hz ; 21.60Jz
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A variant of the one-dimensional “toy model” for QCD of Horowitz et al. is presented, which uses a density dependent rather than the many-body force originally proposed by Lenz et al. Our approach suggests, already within the RPA framework, the occurrence of a phase transition simulating the one from quark to hadronic matter, similar to the transition foreseen by Horowitz et al. However our force is easy to handle in three dimensions as well, but in such a case, of course, the correspondence between our and the “toy model” remains to be verified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01283542
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Collective modes in a slab of interacting nuclear matter (1991)
    Springer
    The European physical journal 338 (1991), S. 149-155 
    Details
    ISSN: 1434-601X
    Keywords: 21.65 ; 21.60J
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study the properties of a slab of nuclear matter. The behaviour with the slab thickness of the particle density, kinetic energy density and surface tension are given in the non-interacting case, together with the slab free response to an external field. Next we introduce a zero-range isovector interaction among the nucleons and analyze the slab collective excitations. For moderate momenta hard and soft modes are found, which exhaust most of the excitation strength. Their position and splitting in energy favourably compares with the splitted giant dipole resonance experimentally seen in deformed nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01284788
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Compton scattering on208Pb (1982)
    Springer
    The European physical journal 309 (1982), S. 143-149 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this paper we briefly review the formalism of the nuclear Compton scattering in the frame of the low-energy theorems (LET). We treat the resonant terms of the amplitude, having collective intermediate nuclear states, as a superposition of Lorentz lines with energy, width and strength fixed by the photo-absorption experiments. The gauge terms are evaluated starting from a simple, but realistic, nuclear Hamiltonian. Dynamical nucleon-nucleon correlations are consistently taken into account, beyond those imposed by the Pauli principle. The comparison of the theoretical predictions with the data of elastic diffusion of photons from208Pb shows that LET are insufficient to account for the experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01414975
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    Paper (German National Licenses)
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