Colloque GANIL 2026

Session

Collective modes

21 sept. 2026, 15:00

Présidents de session

Collective modes

• Kamila Sieja (Institut Pluridisciplinaire Hubert Curien)

72. Probing the Pygmy Dipole Resonance using neutron inelastic scattering

Marine Vandebrouck (CEA Saclay Irfu)

21/09/2026 15:00

Invited Presentation (Only for invited speakers)

The pygmy dipole resonance (PDR) is a low-energy dipole excitation commonly interpreted as the oscillation of a neutron skin against a core symmetric in number of protons and neutrons. Despite extensive experimental and theoretical efforts [1,2] the properties of the PDR remain an active field of investigation. Beyond its fundamental interest, the study of the PDR has been and still is of...

73. Population of Pygmy Dipole Resonance States in Fusion–Fission Reactions

Adam Maj (IFJ PAN)

21/09/2026 15:25

Invited Presentation (Only for invited speakers)

The low-energy part of the electric-dipole response, commonly associated with the Pygmy Dipole Resonance (PDR), has been extensively investigated using a wide range of probes, including photons, alpha particles, protons, neutrons and heavy ions, as well as experimental techniques such as inelastic scattering, beta decay and fusion–evaporation reactions. Interest in PDR states is motivated by...

3. From Global E1 Strength to the Pygmy Dipole: A Shell-Model Perspective on Light Nuclei

Oscar Le Noan (IPHC - CNRS - University of Strasbourg)

21/09/2026 15:50

Oral Presentation

Understanding how atomic nuclei respond to electromagnetic perturbations provides key insights into their structure and dynamics.
In this talk, I will address nuclear response functions, focusing on the electric dipole (E1) mode, one of the most fundamental collective excitations in nuclei. Particular attention will be paid to the Pygmy Dipole Resonance (PDR), an exotic low-energy mode...

54. Discrete Non-Orthogonal Shell Model: from mid-mass to heavy deformed nuclei

M. Duy Duc Dao (IPHC Strasbourg)

21/09/2026 16:10

Oral Presentation

We present an extension of the Discrete Non-Orthogonal Shell Model [1, 2] within a Variation After Projection approach [3] recently developed at IPHC, Strasbourg. This method is an alternative to the exact shell-model diagonalization [4] using non-orthogonal many-body expansions combined with symmetry restoration techniques [5]. We discuss the prospective of the new method for applications...