Microscopic approach to collective motion

• Published in: Nuclear physics. A Vol. 574; no. 1; pp. 185 - 205
• Main Authors: Bonche, P., Chabanat, E., Chen, B.Q., Dobaczewski, J., Flocard, H., Gall, B., Heenen, P.H., Meyer, J., Tajima, N., Weiss, M.S.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 04.07.1994; North-Holland ; Elsevier [1967-....]
• Subjects: Nuclear Theory; Physics
• ISSN: 0375-9474; 1873-1554
• DOI: 10.1016/0375-9474(94)90045-0

An overview of a microscopic framework based on the Hartree-Fock description of the mean field is presented which, starting from an effective interaction allows a description of collective motions. A study of the isotope shifts in the Pb region illustrates the importance of the effective interactions and points to their limitations. Such forces should be improved in order to achieve a better description of nuclei properties especially with the coming availability of exotic beam facilities. The coupling of collective quadrupole and octupole degrees of freedom in 194Pb is analyzed within the Generator Coordinate Method, which represents a step beyond the simple mean-field approximation. As a last example, we present a study of nuclear rotations. First we discuss results on superdeformed rotating bands in 192Hg, 194Hg and 194Pb obtained without including a treatment of pairing correlations. Preliminary calculations are also presented with these correlations included as well as an approximate projection on nucleon number.