Giant Dipole Resonance in A ~ 144 mass region

The Giant Nuclear Dipole Resonance

above the ground state, where a rough calculation indicates S'6 =80 Mev, a result which is in agreement with the experimentally observed position of the giant resonance. We find the p-ray width of this level to be proportional to A&, and use the width to obtain the cross sections for absorption and scattering of y rays in this region. Throughout we have neglected certain effects of the (r 'r, &...

EVIDENCE FOR THE ISOSCALAR GIANT DIPOLE RESONANCE IN 208Pb

Population of Isomers in Decay of the Giant Dipole Resonance

The value of an isomeric ratio (IR) in N=81 isotones (137Ba, 139Ce, 141Nd and 143Sm) is studied by means of the (γ, n) reaction. This quantity measures a probability to populate the isomeric state in respect to the ground state population. In (γ, n) reactions, the giant dipole resonance (GDR) is excited and after its decay by a neutron emission, the nucleus has an excitation energy of a few MeV...

Configuration Mixing Effects in Isoscalar Giant Dipole Resonance

Based on an explicit verification of the coupling matrix elements between the 1p1h and 2p2h states we propose a new method of selecting the most important 2p2h states responsible for fragmentation effects. In this way the dimensionality of the problem is reduced, such that the computation becomes feasible and the spreading of the strength is realistic, as verified by some tests of convergence. ...

Giant dipole resonance in deformed nuclei: dependence on Skyrme forces

P.-G. Reinhard Institut für Theoretische Physik II, Universität Erlangen, D-91058, Erlangen, Germany; [email protected] (Dated: October 11, 2006) Abstract The giant dipole resonance (GDR) in deformed nuclei is analyzed using the self-consistent separable random-phase-approximation (SRPA) with Skyrme forces SkT6, SkM, SLy6 and SkI3. The deformed nuclei Nd and U are used as r...