Journal
FEW-BODY SYSTEMS
Volume 42, Issue 1-4, Pages 33-72Publisher
SPRINGER WIEN
DOI: 10.1007/s00601-008-0200-3
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The angular motion of a few-body system is described with global vectors which depend on the positions of the particles. The previous study using a single global vector is extended to make it possible to describe both natural and unnatural parity states. Numerical examples include three- and four-nucleon systems interacting via nucleon-nucleon potentials of AV8 type and a 3 alpha system with a nonlocal alpha alpha potential. The results using the explicitly correlated Gaussian basis with the global vectors are shown to be in good agreement with those of other methods. A unique role of the unnatural parity component, caused by the tensor force, is clarified in the 0(1)(-) state of He-4. The two-particle correlation function is calculated in the coordinate and momentum spaces to show different characteristics of the interactions employed.
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