Delta excitations in compressed finite nuclei

Journal Article · Fri Jul 01 04:00:00 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), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 50:1; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

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663520 -- Nuclear Mass Ranges-- A=6-19-- (1992-)
663540 -- Nuclear Mass Ranges-- A=39-58-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
BARYON-BARYON INTERACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CALCIUM 40
CALCIUM ISOTOPES
CALCULATION METHODS
CHARGED-PARTICLE REACTIONS
COMPRESSION
DAYS LIVING RADIOISOTOPES
DELTA BARYONS
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
EVEN-EVEN NUCLEI
EXCITED STATES
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
HARTREE-FOCK METHOD
HEAVY ION REACTIONS
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIGHT NUCLEI
N BARYONS
NICKEL 56
NICKEL ISOTOPES
NUCLEAR REACTIONS
NUCLEAR STRUCTURE
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
OXYGEN 16
OXYGEN ISOTOPES
PARTICLE INTERACTIONS
RADIOISOTOPES
STABLE ISOTOPES