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Springer proceedings in physics

Toward the Fundamental Theory of Nuclear Matter Physics: The Microscopic Theory of Nuclear Collective Dynamics

Fumihiko Sakata, Toshio Marumori, Yukio Hashimoto, Hidehiko Tsukuma, Y. Yamamoto, J. Terasaki, Y. Iwasawa, H. Itabashi

Published Jan 1, 1992• 1 citation
Publisher
DOI
10.1007/978-3-642-76379-3_11

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The collective excitation of the nuclear matter is analyzed in a bosonizated formula of Landau Fermi liquid theory. When the nonlinear self-interacting terms of the scalar meson are taken into account in the Walecka model, the collective excitation energies of the nuclear matter can be obtained self-consistently. It shows that the calculation results are consistent with the corresponding experimental data of the nucleus 208Pb{}^{208}Pb208Pb when the quantum number of the orientation of the orbital angular momentum mmm is zero. Moreover, the cases with the nonzero mmm values are also studied, it manifests that the collective excitation energy with the fixed nonzero mmm value are almost invariant when the quantum number of the orbital angular momentum lll changes. However, the collective excitation energy of the nuclear matter decreases with the absolute value of mmm increasing. The direct interaction between two nucleons near the Fermi surface only changes the Fermi velocity, while the exchange interaction causes the collective excitation of the nuclear matter. At this point, it is different from the traditional views in nuclear physics, which announce that the random phase approximation is essential to generate the nuclear collective excitation states.