Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1998-11-24
J.Phys.G25:11-16,1999
Physics
Nuclear Physics
Nuclear Theory
7 pages, 5 figures, Latex2e
Scientific paper
10.1088/0954-3899/25/1/002
The excitation of the isovector giant dipole resonance (GDR) by alpha scattering is investigated as a method of probing the neutron excess in exotic nuclei. DWBA calculations are presented for 28O and 70Ca and the interplay of Coulomb and nuclear excitation is discussed. Since the magnitude of the Coulomb excitation amplitude is strongly influenced by the Q-value, the neutron excess plays an important role, as it tends to lower the energy of the GDR. The excitation of the compressional isoscalar dipole state in 70Ca by alpha scattering is also investigated. It is shown that the population of this latter state may be an even more sensitive probe of the neutron skin than the isovector GDR.
Christley J. A.
Lanza E. G.
Lenzi Silvia M.
Nagarajan M. A.
Vitturi Andrea
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