Temperature Dependence of the Width of the Giant Dipole Resonance in {sup 120}Sn and {sup 208}Pb

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.607· OSTI ID:286748

Ormand, W E; Bortignon, P F; Broglia, R A ^[1]

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1. Physics Department, 401 Nielsen Hall, University of Tennessee, Knoxville, Tennessee 37996-1200 (United States)

The giant-dipole resonance (GDR) in {sup 120}Sn and {sup 208}Pb is studied as a function of excitation energy, angular momentum, and intrinsic width. Theoretical evaluations of the full width at half maximum (FWHM) for the GDR strength function are compared with recent experimental data and are found to be in overall agreement. Differences observed between {sup 120}Sn and {sup 208}Pb are attributed to strong shell corrections in {sup 208}Pb favoring spherical shapes at low temperatures. At high temperature, the FWHM in {sup 120}Sn exhibits effects due to the evaporation width of the compound nucleus. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Oak Ridge National Laboratory
• DOE Contract Number: AC05-84OR21400; FG05-93ER40770
• OSTI ID: 286748
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 4 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANGULAR MOMENTUM
COMPOUND NUCLEI
CORRECTIONS
DIPOLES
ENERGY
EVAPORATION
EXCITATION
GIANT RESONANCE
LEAD 208
STRENGTH FUNCTIONS
TEMPERATURE DEPENDENCE
TIN 120
WIDTH