Charge and transition densities for the samarium isotopes by electron scattering
We analyzed 251.5 and 401.4 MeV electron scattering data on /sup 144,148,150,152/Sm. The momentum transfer ranged from 0.6 to 2.5 fm/sup -1/. These isotopes span the transition region from the spherical /sup 144/Sm to the deformed /sup 152/Sm. Ground state charge distributions and lowest 2/sup +/ state transition charge densities were determined via a phase shift analysis for elastic scattering and distorted-wave Born approximation calculations for inelastic scattering. Our analysis used charge densities described as a sum of spherical Bessel functions over a radius interval from zero to a cutoff of R, with densities zero at larger radii. The fitting for the ground and 2/sup +/ states included constraints in the form of measured Barrett moments from muonic experiments and measured B(E2) transition rates from muonic and other experiments. Error bands were determined for the densities including statistical and normalization uncertainties, and model dependent uncertainties associated with contributions from higher terms in the spherical Bessel function form. We find that as neutrons are added from isotope to isotope, the charge is displaced from the region of 4.0 fm to the region of 7.5 fm. The rms radii of /sup 144,148,150,152/Sm were deduced with uncertainties of about 0.006 to 0.009 fm.
- Research Organization:
- Tel Aviv University, Ramat Aviv, Israel
- OSTI ID:
- 6189862
- Journal Information:
- Phys. Rev. C; (United States), Vol. 24:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELECTRON REACTIONS
INELASTIC SCATTERING
SAMARIUM 144 TARGET
SAMARIUM 148 TARGET
SAMARIUM 150 TARGET
SAMARIUM 152 TARGET
SAMARIUM ISOTOPES
ENERGY-LEVEL TRANSITIONS
ANGULAR DISTRIBUTION
CHARGE DISTRIBUTION
COULOMB FIELD
DEFORMED NUCLEI
DWBA
EXPERIMENTAL DATA
MEV RANGE 100-1000
PARITY
PHASE SHIFT
SPIN
ANGULAR MOMENTUM
BORN APPROXIMATION
CHARGED-PARTICLE REACTIONS
DATA
DISTRIBUTION
ELECTRIC FIELDS
ENERGY RANGE
INFORMATION
ISOTOPES
LEPTON REACTIONS
MEV RANGE
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
PARTICLE PROPERTIES
RARE EARTH ISOTOPES
SCATTERING
TARGETS
651723* - Nuclear Properties & Reactions
A=90-149
Experimental- Energy Levels & Transitions- (-1987)
651725 - Nuclear Properties & Reactions
A=90-149
Experimental- Nuclear Reactions & Scattering- (-1987)
651823 - Nuclear Properties & Reactions
A=150-189
Experimental- Energy Levels & Transitions- (-1987)
651825 - Nuclear Properties & Reactions
A=150-189
Experimental- Nuclear Reactions & Scattering- (-1987)