Abstract
The phenomenon of s-wave intruder orbits is examined for the and isotopes. Although has an s-wave ground state, a three-body model of two neutrons + can only reproduce the properties of if the valence neutrons occupy mainly the ( configuration with about 25% admixture of (sd configurations. For , the possibility of low-lying s-wave states in means that a wide range of models are compatible with the existing radius and momentum measurements, though some s admixture is necessary for binding. We show which kinds of momentum and Coulomb breakup measurements will be necessary to elucidate the structure of the halo. © 1996 The American Physical Society.
- Received 6 July 1995
DOI:https://doi.org/10.1103/PhysRevC.53.708
©1996 American Physical Society