Tensor Forces and the Ground-State Structure of Nuclei

Journal Article · Fri Mar 30 04:00:00 EDT 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.132501· OSTI ID:20951186

Schiavilla, R ^[1]; Wiringa, R B; Pieper, Steven C ^[2]; Carlson, J ^[3]

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1. Jefferson Laboratory, Newport News, Virginia 23606 (United States)
2. Physics Division, Argonne National Laboratory, Argonne, Illinois 61801 (United States)
3. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

Two-nucleon momentum distributions are calculated for the ground states of nuclei with mass number A{<=}8, using variational Monte Carlo wave functions derived from a realistic Hamiltonian with two- and three-nucleon potentials. The momentum distribution of np pairs is found to be much larger than that of pp pairs for values of the relative momentum in the range (300-600) MeV/c and vanishing total momentum. This order of magnitude difference is seen in all nuclei considered and has a universal character originating from the tensor components present in any realistic nucleon-nucleon potential. The correlations induced by the tensor force strongly influence the structure of np pairs, which are predominantly in deuteronlike states, while they are ineffective for pp pairs, which are mostly in {sup 1}S{sub 0} states. These features should be easily observable in two-nucleon knockout processes, such as A(e,e{sup '}np) and A(e,e{sup '}pp)

• OSTI ID: 20951186
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 13 Vol. 98; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CORRELATIONS
GROUND STATES
HAMILTONIANS
KNOCK-OUT REACTIONS
MEV RANGE 100-1000
MONTE CARLO METHOD
NUCLEON-NUCLEON POTENTIAL
NUCLEONS
TENSOR FORCES
TENSORS
VARIATIONAL METHODS
WAVE FUNCTIONS