Magnetic multipole excitations in /sup 12/C by inelastic electron scattering

Journal Article · Sun Jul 01 04:00:00 EDT 1984 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.30.1· OSTI ID:6296818

Hicks, R S; Flanz, J B; Lindgren, R A; Peterson, G A; Fagg, L W; Millener, D J

Magnetic excitations in /sup 12/C have been measured by inelastic electron scattering at backward scattering angles for momentum transfers between q = 0.5 and 3.3 fm/sup -1/. Data for M1, M2, M3, and M4 transitions are compared to shell model calculations. In general, the excitation energies are reasonably predicted, as are the momentum transfer dependences of the form factors. However, the form factor magnitudes often exceed measurements by factors of more than 2. Candidates for 2/sup -/ states are seen at excitation energies of 18.2 and 22.7 MeV. It is shown how structure effects may reduce estimates of isospin mixing matrix elements from (..pi..,..pi..') ratios.

• Research Organization: University of Massachusetts, Amherst, Massachusetts 01003
• OSTI ID: 6296818
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 30:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BACKSCATTERING
CARBON 12
CARBON 12 TARGET
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
ELECTRON REACTIONS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
FORM FACTORS
INELASTIC SCATTERING
ISOSPIN
ISOTOPES
LEPTON REACTIONS
LIGHT NUCLEI
M1-TRANSITIONS
M2-TRANSITIONS
M3-TRANSITIONS
M4-TRANSITIONS
MATHEMATICAL MODELS
MATRIX ELEMENTS
MOMENTUM TRANSFER
MULTIPOLE TRANSITIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
PARITY
PARTICLE PROPERTIES
SCATTERING
SHELL MODELS
SPIN
STABLE ISOTOPES
TARGETS