Semiclassical description of isovector giant multipole resonances

Journal Article · Sun Jan 01 04:00:00 EST 1989 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.39.105· OSTI ID:6826941

Yanhuang, Cai; Di Toro, M

The method discussed here is related to the extension of the Vlasov approach to study isovector collective modes. We analyze dipole, quadrupole, and octupole resonances in /sup 40/Ca and /sup 208/Pb. Full quantum random phase approximation results are well reproduced. A collision term is added through a relaxation time approach. It is shown that the widths of the giant resonances are dominated by an interplay between Landau damping and collision damping. A quite fair agreement with recent quadrupole data is found. Some temperature in the reference state is introduced, in order to study the behavior of collective motions built on excited states. We get a moderate increase of the widths and a clear quenching of the strengths. A shift of the resonance energy is also observed, actually very sensitive to the residual interaction used.

• Research Organization: Dipartimento di Fisica and Istituto Nazionale di Fisica Nucleare, Sezione di Catania, 95129 Catania, Italy
• OSTI ID: 6826941
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 39:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653001* -- Nuclear Theory-- Nuclear Structure
Moments
Spin
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
BOLTZMANN-VLASOV EQUATION
CALCIUM 40
CALCIUM ISOTOPES
COLLECTIVE MODEL
COULOMB FIELD
DAMPING
DIFFERENTIAL EQUATIONS
ELECTRIC FIELDS
EQUATIONS
EVEN-EVEN NUCLEI
FUNCTIONS
GIANT RESONANCE
HARTREE-FOCK METHOD
HEAVY NUCLEI
ISOTOPES
LANDAU DAMPING
LEAD 208
LEAD ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MULTIPOLES
NUCLEAR MODELS
NUCLEAR POTENTIAL
NUCLEI
PARTIAL DIFFERENTIAL EQUATIONS
POTENTIALS
PROBABILITY
RESONANCE
RESPONSE FUNCTIONS
SEMICLASSICAL APPROXIMATION
STABLE ISOTOPES
WOODS-SAXON POTENTIAL