Delta. degrees of freedom in trinuclei. V. Exotic contributions

Journal Article · Thu Oct 01 04:00:00 EDT 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.46.1178· OSTI ID:6949072

Picklesimer, A; Rice, R A; Brandenburg, R ^[1]

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1. Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States) Department of Physics, Purdue University, West Lafayette, Indiana 47907 (United States) Institute for Physics, University of Basel, 3056 Basel (Switzerland)

Three-body channels constructed from two-body {ital N}{Delta} and {Delta}{Delta} states with non-nucleonic {ital JT}{pi} values ({ital J},{ital T}, and {pi} denote conserved angular momentum, isospin, and parity, respectively) appear in the three-body Faddeev equation. The effects of such exotic'' channels on the triton binding energy ({ital E}{sub {ital T}}) are studied here for the first time, using the Argonne V28 {Delta} model. Two types of exotic {ital JT}{pi} sectors are distinguished: Pauli exotic'' sectors from which {ital NN} channels are absent due to the Pauli principle and spin considerations, and isospin exotic'' sectors which have the non-nucleonic value ({ital T}=2) of the two-body isospin. Pauli exotic contributions to {ital E}{sub {ital T}} are found to yield about 90 keV of repulsion, while isospin exotics add another 55 keV to this figure, for a total effect of about 145 keV. Exotic effects thus only slightly modify our previous V28-model result for {ital E}{sub {ital T}} based on nonexotic {ital NNN}, {ital NN}{Delta}, {ital N}{Delta}{Delta}, and {Delta}{Delta}{Delta} configurations, moving it from about 7.29 MeV down to about 7.14 MeV. This worsens the triton binding energy defect to about 1.5 MeV. Exotic effects are further decomposed and overall implications are discussed as well.

• OSTI ID: 6949072
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 46:4; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

663110* -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663510 -- Nuclear Mass Ranges-- A=1-5-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
DELTA BARYONS
ELEMENTARY PARTICLES
ENERGY LEVELS
EQUATIONS
EXCITED STATES
FADDEEV EQUATIONS
FERMIONS
HADRONS
HYDROGEN ISOTOPES
ISOSPIN
ISOTOPES
LIGHT NUCLEI
MANY-BODY PROBLEM
MATHEMATICAL MODELS
N BARYONS
NUCLEAR MODELS
NUCLEI
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
PAULI PRINCIPLE
RADIOISOTOPES
SPIN
THREE-BODY PROBLEM
TRITIUM
YEARS LIVING RADIOISOTOPES