Mixing of isoscalar and isovector magnetic dipole excitation modes in /sup 206/Pb and /sup 208/Pb: Case of electron scattering form factors
Journal Article
·
· Phys. Rev. C; (United States)
Inelastic electron scattering form factors of the J/sup ..pi../ = 1/sup +/ states at excitation energies E/sub x/ = 5.800 and 5.846 MeV in /sup 206/Pb and /sup 208/Pb, respectively, are discussed in terms of a simple model of isoscalar-isovector mixing. It is known that for these states, which are often called loosely ''isoscalar'' 1/sup +/ states, about half of the transition strength is accounted for by this mixing. It is demonstrated here that the isoscalar-isovector mixing is also crucial for explaining the momentum dependence and the absolute magnitude of the form factor. The relative importance of the convection current contribution to the form factor with respect to the spin one is also studied. Finally, the isovector M1 strength distribution in /sup 206/Pb between E/sub x/ = 6.7--8.2 MeV derived from high resolution inelastic electron scattering is shown to agree in shape and magnitude with the one measured recently in an experiment with tagged polarized photons.
- Research Organization:
- Institut fr Kernphysik, Technische Hochschule Darmstadt, 6100 Darmstadt, Federal Republic of Germany
- OSTI ID:
- 6462156
- Journal Information:
- Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 36:2; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
651920* -- Nuclear Properties & Reactions
A=190-219
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
CHARGED-PARTICLE REACTIONS
DISTRIBUTION
ELECTRON REACTIONS
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
FORM FACTORS
HEAVY NUCLEI
INELASTIC SCATTERING
ISOTOPES
LEAD 206
LEAD 206 TARGET
LEAD 208
LEAD 208 TARGET
LEAD ISOTOPES
LEPTON REACTIONS
M1-TRANSITIONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MULTIPOLE TRANSITIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
PARITY
PARTICLE PROPERTIES
PARTICLE-HOLE MODEL
PHOTONS
POLARIZATION
SCATTERING
SPECTRA
SPIN
STABLE ISOTOPES
TARGETS
A=190-219
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
CHARGED-PARTICLE REACTIONS
DISTRIBUTION
ELECTRON REACTIONS
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
FORM FACTORS
HEAVY NUCLEI
INELASTIC SCATTERING
ISOTOPES
LEAD 206
LEAD 206 TARGET
LEAD 208
LEAD 208 TARGET
LEAD ISOTOPES
LEPTON REACTIONS
M1-TRANSITIONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MULTIPOLE TRANSITIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
PARITY
PARTICLE PROPERTIES
PARTICLE-HOLE MODEL
PHOTONS
POLARIZATION
SCATTERING
SPECTRA
SPIN
STABLE ISOTOPES
TARGETS