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Experimental study of shell effects in the giant resonance in /sup 27/Al

Journal Article · · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)
OSTI ID:5699730
; ; ;

Photoproton spectra have been obtained from the /sup 27/Al nucleus at 14 bremsstrahlung maximum energies E/sup max//sub ..gamma../ in the range 17.0--29.7 MeV. From the spectra we have calculated the partial cross sections for the photoproton reaction with formation of the final nucleus in the ground state, the first two excited states, and in groups of states with centers of gravity at 4.4, 6.6, 8.5, 11.0, and 13.0 MeV. The sum of the partial cross sections exhausts the total cross section of the (..gamma..,p) reaction. Analysis of the experimental results was carried out simultaneously for the nuclei /sup 27/Al, /sup 26/Mg, and /sup 28/Si with use of data on pickup reactions. The role of nucleons of different shells and the fraction of excitations of the 1p1h type in the /sup 27/Al giant dipole resonance are estimated. The influence of the structure of the ground state of nuclei of the 1d-2s shell on the properties of the giant resonance is discussed.

Research Organization:
Nuclear Physics Institute, Moscow State University
OSTI ID:
5699730
Journal Information:
Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 33:4; ISSN SJNCA
Country of Publication:
United States
Language:
English

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Related Subjects

651423 -- Nuclear Properties & Reactions
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 27
ALUMINIUM 27 TARGET
ALUMINIUM ISOTOPES
BARYONS
CROSS SECTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GIANT RESONANCE
HADRONS
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
PARTICLE-HOLE MODEL
PHOTONUCLEAR REACTIONS
PHOTOPROTONS
PROTONS
RESONANCE
SHELL MODELS
STABLE ISOTOPES
TARGETS