Quantum Monte Carlo calculations of excited states in A=6-8 nuclei

Journal Article · Mon Nov 01 00:00:00 EST 2004 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.70.054325· OSTI ID:20695743

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

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1. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

A variational Monte Carlo method is used to generate sets of orthogonal trial functions, {psi}{sub T}(J{sup {pi}};T), for given quantum numbers in various light p-shell nuclei. These {psi}{sub T} are then used as input to Green's function Monte Carlo (GFMC) calculations of first, second, and higher excited (J{sup {pi}};T) states. Realistic two- and three-nucleon interactions are used. We find that if the physical excited state is reasonably narrow, the GFMC energy converges to a stable result. With the combined Argonne v{sub 18} two-nucleon and Illinois-2 three-nucleon interactions, the results for many second and higher states in A=6-8 nuclei are close to the experimental values.

• OSTI ID: 20695743
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 70, Issue 5; Other Information: DOI: 10.1103/PhysRevC.70.054325; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
GREEN FUNCTION
LIGHT NUCLEI
MONTE CARLO METHOD
NUCLEAR FORCES
NUCLEONS
PARITY
PARTICLE INTERACTIONS
QUANTUM NUMBERS
SHELL MODELS
SPIN
VARIATIONAL METHODS