Coupled-channels analysis of proton inelastic scattering to the. gamma. -vibrational band in /sup 24/Mg

Journal Article · Mon Oct 01 04:00:00 EDT 1979 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.20.1236· OSTI ID:5813370

Ray, L; Blanpied, G S; Coker, W R

Results are presented of coupled-channels analyses of proton inelastic scattering data for the nucleus /sup 24/Mg, in which the 2/sup +//sub 2/, 4.24 MeV, 3/sup +/, 5.2 MeV, 4/sup +//sub 2/, 6.01 MeV, and 5/sup +/(.), 7.8 MeV states of the ..gamma..-vibrational band are excited, at incident proton energies of 20.3, 40, and 800 MeV. Previous coupled-channels analyses of proton and ..cap alpha.. particle inelastic scattering data for these states in /sup 24/Mg have completely failed to account for the shapes and magnitudes of the 3/sup +/, 4/sup +//sub 2/, and 5/sup +/ inelastic cross sections. In the present analysis, the inclusion of an additional nuclear vibrational multipole which permits a direct transition from the ground state to the 4/sup +//sub 2/, 6.01 MeV state is shown to provide a tremendous improvement in the theoretical description of the inelastic cross sections of all the members of the ..gamma..-vibrational band, at each of the three incident proton energies considered. The same nuclear structure parameters are used at all three incident energies, along with phenomenological optical potentials specific to each energy. The new results for the 3/sup +/, 5.2 MeV state also shed light on the energy dependence of the direct spin-flip mechanism in proton inelastic scattering.

• Research Organization: Theoretical Division, Los Alamos Scientific Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 5813370
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 20:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651413* -- Nuclear Properties & Reactions
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651415 -- Nuclear Properties & Reactions
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Theoretical-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ANGULAR MOMENTUM
BARYON REACTIONS
BORN APPROXIMATION
CHARGED-PARTICLE REACTIONS
COUPLED CHANNEL THEORY
CROSS SECTIONS
DEFORMED NUCLEI
DWBA
ENERGY DEPENDENCE
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EXCITED STATES
GAMMA SPECTRA
HADRON REACTIONS
INELASTIC SCATTERING
ISOTOPES
LIGHT NUCLEI
MAGNESIUM 24
MAGNESIUM 24 TARGET
MAGNESIUM ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEAR STRUCTURE
NUCLEI
NUCLEON REACTIONS
OPTICAL MODELS
PARITY
PARTICLE PROPERTIES
PROTON REACTIONS
SCATTERING
SHELL MODELS
SPECTRA
SPIN
SPIN FLIP
STABLE ISOTOPES
TARGETS
VIBRATIONAL STATES