Abstract
Background-free inelastic scattering spectra have been obtained for the Sm isotopes with 400 MeV alpha particles at forward angles (including 0degrees) to investigate the effect of deformation on the compressional-mode giant resonances. The strength distributions for the isoscalar giant resonances (L <3) have been extracted for the spherical nucleus Sm-144 and the deformed nucleus (SM)-S-154. We have observed that the effects of deformation are different for the low- and high-excitation-energy components of the isoscalar giant dipole resonance in Sm-154. Evidence for the theoretically predicted coupling between the isoscalar dipole resonance and the high-energy octupole resonance is reported.
Original language | English |
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Article number | PII S0370-2693(02)02892-7 |
Pages (from-to) | 58-63 |
Number of pages | 6 |
Journal | Physics Letters B |
Volume | 549 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 28-Nov-2002 |
Keywords
- MONOPOLE RESONANCE
- COLLECTIVE STATES
- DIPOLE RESONANCE
- ALPHA-PARTICLES
- ISOSCALAR
- SCATTERING
- EXCITATION
- ENERGY
- SN-116
- PB-208