Macroscopic description of isoscalar giant multipole resonances

Journal Article · Tue Jan 01 00:00:00 EST 1980 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.21.396· OSTI ID:5541080

Nix, J R; Sierk, A J

On the basis of a simple macroscopic model, we calculate the isoscalar giant-resonance energy as a function of mass number and multipole degree. The restoring force is determined from the distortion of the Fermi surface, and the inertia is determined for the incompressible, irrotational flow of nucleons with unit effective mass. With no adjustable parameters, the resulting closed expression reproduces correctly the available experimental data, namely the magnitude and dependence upon mass number of the giant quadrupole energy and the magnitude of the giant octupole energy for /sup 208/Pb. We also calculate the isoscalar giant-resonance width as a function of mass number and multipole degree for various macroscopic damping mechanisms, including two-body viscosity, one-body dissipation, and modified one-body dissipation. None of these damping mechanisms reproduces correctly all features of the available experimental data, namely the magnitude and dependence upon mass number of the giant quadrupole width and the magnitude of the giant octupole width for /sup 208/Pb.

• Research Organization: Theoretical Division, Los Alamos Scientific Laboratory, University of California, Los Alamos, New Mexico 87545
• OSTI ID: 5541080
• Journal Information: Phys. Rev., C; (United States), Vol. 21:1
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
LEAD 208
GIANT RESONANCE
BOLTZMANN EQUATION
DISTRIBUTION FUNCTIONS
FERMI LEVEL
HARMONIC OSCILLATOR MODELS
MULTIPOLES
NUCLEON-NUCLEON INTERACTIONS
PROBABILITY
RANDOM PHASE APPROXIMATION
SCHROEDINGER EQUATION
BARYON-BARYON INTERACTIONS
DIFFERENTIAL EQUATIONS
ENERGY LEVELS
EQUATIONS
EVEN-EVEN NUCLEI
HADRON-HADRON INTERACTIONS
HEAVY NUCLEI
INTERACTIONS
ISOTOPES
LEAD ISOTOPES
MATHEMATICAL MODELS
NUCLEI
PARTICLE INTERACTIONS
RESONANCE
STABLE ISOTOPES
WAVE EQUATIONS
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