Excitation of low-lying collective states in /sup 40/Ca and /sup 208/Pb by inelastic neutron scattering

Journal Article · Sat Oct 01 00:00:00 EDT 1977 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.16.1377· OSTI ID:5234338

Bainum, D E; Finlay, R W; Rapaport, J; Carlson, J D; Love, W G

Differential cross sections for elastic and inelastic scattering of neutrons from /sup 208/Pb and /sup 40/ Ca targets have been measured at 11, 20, and 25.7 MeV incident energies. The elastic scattering data were used to provide optical model parameters for use in macroscopic and microscopic model analyses of the data using the distorted wave method. The macroscopic model analysis resulted in deformation parameters consistent with those obtained in analogous (p,p') reactions which excite the 3/sup -/ and 5/sup -/ collective states in these nuclei. The macroscopic model provides a good description of the differential cross sections. The microscopic model analysis used random-phase approximation detailed wave vectors for the states involved. Two ''realistic'' effective interactions were studied, one with and one without density dependence. The imaginary contribution to the effective interaction was found to be important in reproducing the shape of the differential cross section in /sup 40/Ca. Exchange amplitudes were calculated exactly. The magnitudes of the 3/sup -/ cross sections for both nuclei were well described by these calculations.

• Research Organization: Department of Physics, Ohio University, Athens, Ohio 45701
• OSTI ID: 5234338
• Journal Information: Phys. Rev., C; (United States), Vol. 16:4
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALCIUM 40
ENERGY LEVELS
EXCITED STATES
CALCIUM 40 TARGET
NEUTRON REACTIONS
LEAD 208
LEAD 208 TARGET
ELASTIC SCATTERING
INELASTIC SCATTERING
ANGULAR DISTRIBUTION
DIFFERENTIAL CROSS SECTIONS
DISTORTED WAVE THEORY
MEV RANGE 10-100
OPTICAL MODELS
PARITY
SHELL MODELS
SPIN
ALKALINE EARTH ISOTOPES
ANGULAR MOMENTUM
BARYON REACTIONS
CALCIUM ISOTOPES
CROSS SECTIONS
DISTRIBUTION
ENERGY RANGE
EVEN-EVEN NUCLEI
HADRON REACTIONS
HEAVY NUCLEI
ISOTOPES
LEAD ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MEV RANGE
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PARTICLE PROPERTIES
SCATTERING
STABLE ISOTOPES
TARGETS
651523* - Nuclear Properties & Reactions
A=39-58
Experimental- Energy Levels & Transitions- (-1987)
651525 - Nuclear Properties & Reactions
A=39-58
Experimental- Nuclear Reactions & Scattering- (-1987)
651523 - Nuclear Properties & Reactions
A=39-58
Experimental- Energy Levels & Transitions- (-1987)