Delta excitations in compressed finite nuclei

Journal Article · Fri Jul 01 00:00:00 EDT 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.50.202· OSTI ID:7180498

Hasan, M A ^[1]; Vary, J P ^[2]

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1. Applied Science University, Amman (Jordan)
2. Institute for Theoretical Physics, University of Heidelberg, Heidelberg (Germany) Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)

We treat [sup 16]O, [sup 40]Ca, and [sup 56]Ni as systems of baryons which can exist in either the ground (nucleon) state or first excited (delta) state and follow their behavior under static comrpession using constrained spherical Hartree-Fock approximation (SHF). We use realistic effective nucleon-nucleon interactions with meson-exchange-based nucleon-delta transition potentials and delta-delta interactions and we make phenomenological adjustments to obtain SHF equilibrium properties in agreement with experiment. We then show how physical properties are affected by delta excitation under compression. We find that a significant fraction of the increase in energy of these nuclei under compression is stored in the form of [Delta]-mass creation. This, in turn, may have implications for an enhanced role for nuclear compression in subthreshold pion production in nucleus-nucleus collisions. In addition, including the deltas leads to a lower compressibility of each of these nuclei.

• DOE Contract Number: FG02-87ER40371
• OSTI ID: 7180498
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Vol. 50:1; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALCIUM 40
DELTA BARYONS
NICKEL 56
OXYGEN 16
COMPRESSION
EXCITED STATES
HARTREE-FOCK METHOD
HEAVY ION REACTIONS
NUCLEAR STRUCTURE
NUCLEON-NUCLEON INTERACTIONS
ALKALINE EARTH ISOTOPES
BARYON-BARYON INTERACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CALCIUM ISOTOPES
CALCULATION METHODS
CHARGED-PARTICLE REACTIONS
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
EVEN-EVEN NUCLEI
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIGHT NUCLEI
N BARYONS
NICKEL ISOTOPES
NUCLEAR REACTIONS
NUCLEI
OXYGEN ISOTOPES
PARTICLE INTERACTIONS
RADIOISOTOPES
STABLE ISOTOPES
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