Abstract
The monopole excitations ( ) of light neutron-excess systems are investigated by the generalized two-center cluster model. We analyze the mechanism of an enhancement of the monopole strength in connection to structures of adiabatic energy surfaces as a function of an - distance. The crossing of two adiabatic energy surfaces, which have different intrinsic configurations, increases the monopole strength. Furthermore, we find that the monopole strength is strongly enhanced by a smooth connection in the adiabatic energy surface from the ground state to the excited state. A comparison of the calculated strength with the respective single particle limit is also discussed.
- Received 13 August 2010
DOI:https://doi.org/10.1103/PhysRevC.83.044319
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