Abstract
Strength functions for isoscalar dipole excitations in and have been measured with inelastic scattering of 240 MeV α particles at small angles. The isoscalar strength distribution in each nucleus is found to consist of a broad component at containing approximately 100% of the EWSR and a narrower one at containing 15–28 % of the total isoscalar strength. The higher component is the compression mode strength previously reported only in whereas the lower component may be a new mode not reported previously, but suggested by recent RPA-HF and relativistic mean field calculations.
- Received 30 August 2000
DOI:https://doi.org/10.1103/PhysRevC.63.031301
©2001 American Physical Society