Giant multipole resonances from inelastic scattering of 152-MeV alpha particles

Journal Article · Sat Nov 01 04:00:00 EST 1980 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.22.1832· OSTI ID:5000638

Bertrand, F E; Satchler, G R; Horen, D J; Wu, J R; Bacher, A D; Emery, G T; Jones, W P; Miller, D W; van der Woude, A

Giant resonance spectra have been measured for /sup 208/Pb, /sup 120/Sn, /sup 90/Zr, /sup 58/Ni, and /sup 46/Ti, using inelastic scattering of 152-MeV alpha particles. In addition to some low-lying states, the spectra were analyzed to yield separate peaks for the giant quadrupole resonance and giant monopole resonance, except in /sup 46/Ti, where no evidence was found for a giant monopole resonance. The results for the monopole resonance when compared to distorted-wave Born-approximation calculations show that approx.100% ( +- 20%) of the T=0, L=0 energy weighted sum rule is depleted for nuclei with A>90. For /sup 58/Ni only 40% of the monopole sum rule is found. The excitation energy of the giant monopole resonance follows the systematic trend approx.80 A/sup -1/3/ MeV. The data are also compared with folding model calculations using Tassie transition densities and an effective interaction derived from elastic data. Good agreement was obtained for low-lying quadrupole and octopole excitations, but this model yields considerably too little cross section for the monopole resonance. This probably indicates a deficiency in the Tassie model breathing mode transition density.

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• OSTI ID: 5000638
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 22:5; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ALPHA REACTIONS
BORN APPROXIMATION
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DATA
DIFFERENTIAL CROSS SECTIONS
DWBA
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
GIANT RESONANCE
HEAVY NUCLEI
INELASTIC SCATTERING
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOCHRONOUS CYCLOTRONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
IU CYCLOTRON
LEAD 208
LEAD 208 TARGET
LEAD ISOTOPES
MEV RANGE
MEV RANGE 100-1000
MULTIPOLE TRANSITIONS
NICKEL 58
NICKEL 58 TARGET
NICKEL ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
RADIOISOTOPES
RESONANCE
SCATTERING
STABLE ISOTOPES
TARGETS
TIN 120
TIN 120 TARGET
TIN ISOTOPES
TITANIUM 46
TITANIUM 46 TARGET
TITANIUM ISOTOPES
ZIRCONIUM 90
ZIRCONIUM 90 TARGET
ZIRCONIUM ISOTOPES