Isoscalar giant dipole resonance in {sup 90}Zr, {sup 116}Sn, and {sup 208}Pb

Journal Article · Thu Mar 01 00:00:00 EST 2001 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.63.031301· OSTI ID:40206151

Clark, H L; Lui, Y -W; Youngblood, D H

Strength functions for isoscalar dipole excitations in {sup 90}Zr, {sup 116}Sn, and {sup 208}Pb have been measured with inelastic scattering of 240 MeV {alpha} particles at small angles. The isoscalar E1 strength distribution in each nucleus is found to consist of a broad component at E{sub x}{approx}114/A{sup 1/3}MeV containing approximately 100% of the E1 EWSR and a narrower one at E{sub x}{approx}72/A{sup 1/3}MeV containing 15--28% of the total isoscalar E1 strength. The higher component is the compression mode E1 strength previously reported only in {sup 208}Pb, whereas the lower component may be a new mode not reported previously, but suggested by recent RPA-HF and relativistic mean field calculations.

• Sponsoring Organization: (US)
• OSTI ID: 40206151
• Journal Information: Physical Review C, Vol. 63, Issue 3; Other Information: DOI: 10.1103/PhysRevC.63.031301; Othernumber: PRVCAN000063000003031301000001; R05102PRC; PBD: Mar 2001; ISSN 0556-2813
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPRESSION
DIPOLES
DISTRIBUTION
INELASTIC SCATTERING
RESONANCE
STRENGTH FUNCTIONS