Collective Modes in a Slab of Interacting Nuclear Matter: The effects of finite range interactions

Details Collective Modes in a Slab of Interacting Nuclear Matter: The effects of finite range interactions Collective Modes in a Slab of Interacting Nuclear Matter: The effects of finite range interactions

1993-04-06

arxiv.org/abs/nucl-th/9304003v2

Z.Phys.A348:17-23,1994

Physics

Nuclear Physics

Nuclear Theory

14 pages, TeX, 5 figures (separate uuencoded and tar-compressed postscript files), Torino preprint DFTT 6/93

Scientific paper

We consider a slab of nuclear matter and investigate the collective excitations, which develop in the response function of the system. We introduce a finite-range 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 the S=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 .

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