Phase-space exploration in nuclear giant resonance decay

Journal Article · Mon Feb 13 00:00:00 EST 1995 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.74.1075· OSTI ID:6475588

Drozdz, S; Nishizaki, S; Wambach, J; Speth, J ^[1]

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1. Institut fuer Kernphysik, Forschungszentrum Juelich, D-52425 Juelich (Germany) Institute of Nuclear Physics, PL-31-342 Krakow (Poland) Department of Physics, University of Illinois at Urbana, Illinois 61801 (United States) College of Humanities and Social Sciences, Iwate University, Ueda 3-18-34, Morioka 020 (Japan)

The rate of phase-space exploration in the decay of isovector and isoscalar giant quadrupole resonances in [sup 40]Ca is analyzed. The study is based on the time dependence of the survival probability and of the spectrum of generalized entropies evaluated in the space of one-particle--one-hole (1p-1h) and 2p-2h states. Three different cases for the level distribution of 2p-2h background states, corresponding to (a) high degeneracy, (b) classically regular motion, and (c) classically chaotic motion, are studied. In the latter case the isovector excitation evolves almost statistically while the isoscalar excitation remains largely localized, even though it penetrates the whole available phase space.

• OSTI ID: 6475588
• Journal Information: Physical Review Letters; (United States), Vol. 74:7; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Pa
CALCIUM 40
GIANT RESONANCE
NUCLEAR DECAY
PHASE SPACE
ENTROPY
EXCITATION
ISOVECTORS
PARTICLE-HOLE MODEL
PROBABILITY
QUADRUPOLES
SPECTRA
TIME DEPENDENCE
ALKALINE EARTH ISOTOPES
CALCIUM ISOTOPES
DECAY
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MATHEMATICAL SPACE
MULTIPOLES
NUCLEAR MODELS
NUCLEI
PHYSICAL PROPERTIES
RESONANCE
SPACE
STABLE ISOTOPES
TENSORS
THERMODYNAMIC PROPERTIES
VECTORS
662200* - Specific Theories & Interaction Models
Particle Systematics- (1992-)