Collisional width of giant resonances and interplay with Landau damping
Journal Article
·
· Phys. Rev. C; (United States)
We present a semiclassical method to calculate the widths of giant resonances. We solve a mean-field kinetic equation (Vlasov equation) with collision terms treated within the relaxation time approximation to construct a damped strength distribution for collective motions. The relaxation time is evaluated from the time evolution of distortions in the nucleon momentum distribution using a test-particle approach. The importance of an energy dependent nucleon-nucleon cross section is stressed. Results are shown for isoscalar giant quadrupole and octupole motions. A quite important interplay between self-consistent (Landau) and collisional damping is revealed.
- Research Organization:
- Sektion Physik, Universitat Munchen, D-8046 Garching, Federal Republic of Germany Dipartimento di Fisica, Universita di Catania 57, Corso Italia, I-95129 Catania, Italy Istituto Nazionale di Fisica Nucleare, Sezione di Catania, 57 Corso Italia, I-95129 Catania, Italy(DE)
- OSTI ID:
- 6037997
- Journal Information:
- Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 39:6; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
653001* -- Nuclear Theory-- Nuclear Structure
Moments
Spin
& Models
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON-BARYON INTERACTIONS
BOLTZMANN-VLASOV EQUATION
COLLECTIVE MODEL
CROSS SECTIONS
DAMPING
DIFFERENTIAL EQUATIONS
ENERGY DEPENDENCE
EQUATIONS
FUNCTIONS
GIANT RESONANCE
HADRON-HADRON INTERACTIONS
INTERACTIONS
LANDAU DAMPING
LEVEL WIDTHS
MATHEMATICAL MODELS
MATHEMATICAL SPACE
MEAN-FIELD THEORY
NUCLEAR MODELS
NUCLEON-NUCLEON INTERACTIONS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE INTERACTIONS
PARTICLE-HOLE MODEL
PHASE SPACE
RANDOM PHASE APPROXIMATION
RELAXATION TIME
RESONANCE
RESPONSE FUNCTIONS
SEMICLASSICAL APPROXIMATION
SPACE
TEST PARTICLES
Moments
Spin
& Models
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON-BARYON INTERACTIONS
BOLTZMANN-VLASOV EQUATION
COLLECTIVE MODEL
CROSS SECTIONS
DAMPING
DIFFERENTIAL EQUATIONS
ENERGY DEPENDENCE
EQUATIONS
FUNCTIONS
GIANT RESONANCE
HADRON-HADRON INTERACTIONS
INTERACTIONS
LANDAU DAMPING
LEVEL WIDTHS
MATHEMATICAL MODELS
MATHEMATICAL SPACE
MEAN-FIELD THEORY
NUCLEAR MODELS
NUCLEON-NUCLEON INTERACTIONS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE INTERACTIONS
PARTICLE-HOLE MODEL
PHASE SPACE
RANDOM PHASE APPROXIMATION
RELAXATION TIME
RESONANCE
RESPONSE FUNCTIONS
SEMICLASSICAL APPROXIMATION
SPACE
TEST PARTICLES