Electroexcitation of giant multipole resonances in /sup 24/Mg

Journal Article · Sun Mar 01 04:00:00 EST 1981 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.23.945· OSTI ID:6901089

Itoh, K; Ohsawa, S; Torizuka, Y; Saito, T; Terasawa, T

Highly excited multipole resonances of /sup 24/Mg between 9 and 34 MeV excitation energy have been investigated by inelastic electron scattering for incident energies in the 102 and 200 MeV range. Prominent giant dipole resonances were observed at 18.9 and 20 MeV excitation energy, with a shape which is very similar to the shape of the photoneutron cross section. Over twenty-five quadrupole and twenty octupole resonances were identified and separated by means of the multipole expansion method. The giant dipole strength exhausts (85/sup +9//sub -/17)% of the isovector dipole energy-weighted sum rule. The quadrupole and the octupole strength exhaust (117 +- 23)% and (115 +- 23)% of the corresponding isoscalar energy-weighted sum rule, respectively. Evidence for the excitation of higher multipole states such as hexadecapole transitions was also found in the excitation energy region studied.

• Research Organization: Saskatchewan Accelerator Laboratory, University of Saskatchewan, Saskatoon S7N 0W0, Canada
• OSTI ID: 6901089
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 23:3; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ANGULAR DISTRIBUTION
BARYONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DISTRIBUTION
ELECTRON REACTIONS
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EQUATIONS
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
FERMIONS
GIANT RESONANCE
HADRONS
INELASTIC SCATTERING
INFORMATION
ISOTOPES
LEPTON REACTIONS
LIGHT NUCLEI
MAGNESIUM 24
MAGNESIUM 24 TARGET
MAGNESIUM ISOTOPES
MEV RANGE
MEV RANGE 100-1000
MULTIPOLES
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
NUMERICAL DATA
PHOTONEUTRONS
PHOTONUCLEONS
RESONANCE
SCATTERING
STABLE ISOTOPES
SUM RULES
TARGETS