Giant and soft modes of excitation in nuclear structure and astrophysics

24 Oct 2022, 08:30 → 28 Oct 2022, 19:00 Europe/Rome

Aula "Renzo Leonardi" (ECT*)

Elena Litvinova (Western Michigan University (USA)), Horst Lenske (U. Giessen)

The workshop will focus on the properties of dipole excitations, in particular at low energies, experimentally studied with a variety of probes, and theoretically described by a number of approaches going beyond time-dependent mean field approximations. The emphasis will be placed on the role these modes play in nuclear structure, as evidenced in neutron radii and neutron skin (halo), as well as medium polarization effects in both finite nuclei and neutron-rich environments in astrophysics.

The main objective of the workshop is to elaborate research strategies for better understanding the microscopic mechanisms underlying the low-energy dipole excitations, especially in nuclear systems away from the stability valley. Capabilities and challenges of currently available methods will be assessed in a dialogue between the theoretical and experimental nuclear physics communities. Future directions of advancing the many-body techniques toward achieving the spectroscopic accuracy will be outlined.

ECT_Poster.pdf

Pictures

YouTube Channel

Monday, 24 October

08:30 → 12:35 Morning Session 1: Chair: T.B.A.

08:30 Registration

08:50 Welcome and Opening

Speakers: Elena Litvinova (Western Michigan University (USA)), Horst Lenske (U. Giessen)

09:00 Pygmy or not Pygmy - an experimentalist's point of view

Speaker: Andreas Zilges (University of Cologne)

Zilges_trento_2022.pdf

09:45 Discussion

10:00 Welcome Address by the Director of ECT*

10:05 A short review on Pygmy Resonances: open problems

Speaker: Edoardo G. Lanza (INFN - Sezione di Catania)

10:50 Discussion

11:05 Coffe Break

11:35 Beyond mean field study of Giant resonances with tensor interaction

Speaker: Hiroyuki Sagawa (RIKEN/University of Aizu)

Trento-Oct-2022-GR.pdf

12:20 Discussion

12:35 → 14:00 Lunch Break

14:00 → 18:00 Afternoon Session 1: Chair

Chair: T.B.A.

14:00 Relativistic Brueckner-Hartree-Fock Theory: an ab initio Approach for Finite Nuclei

Speaker: Peter Ring (Physikdepartment TUM)

221024-Ring-Trento.ppt

14:45 Discussion

15:00 Microscopic Structure of the Low-Energy Electric Dipole Response of 120Sn

Speaker: Michael Weinert (University of Cologne)

Weinert_Trento_2022_Publish.pdf

15:35 Discussion

15:45 Coffee Break

16:00 Systematics of the dipole polarizability

Speaker: Isabelle Brandherm (Technische Universität Darmstadt)

brandherm_etc.pdf

16:35 Discussion

16:45 Implications of PREX-2 on the electric dipole polarizability of neutron-rich nuclei

Speaker: Jorge Piekarewicz (Florida State University)

ECT2022-Piekarewicz.key

ECT2022-Piekarewicz.pdf

17:30 Discussion

17:45 Resumee of the day 1

20:00 → 21:00 Welcome Dinner

Tuesday, 25 October

09:00 → 12:30 Morning Session 2: Chair: T.B.A.

09:00 Experimental signatures of a toroidal electric dipole mode in nuclei

Speaker: Peter von Neumann-Cosel (Institut fur Kernphysik, TU Darmstadt)

2022 ECT Toroidal E1 Mode.pdf

09:45 Discussion

10:00 Dipole excitations in nuclei: recent studies within the largescale shell model and beyond

Speaker: Kamila Sieja (IPHC/ CNRS Strasbourg)

ect.pdf

10:45 Discussion

11:00 Coffee Break

11:30 Giant and pigmy modes from coupled-cluster theory

Speaker: Sonia Bacca

bacca_ECT__2022.pdf

12:15 Discussion

12:30 → 14:00 Lunch break

14:00 → 18:00 Afternoon Session 2: Chair: T.B.A.

14:15 in memoriam Ricardo A. Broglia

Speaker: Enrico Vigezzi

broglia_vigezzi_litv.pdf

14:45 Microscopic Calculations of Giant Pairing Vibrations in Light Nuclei

Speaker: Francisco Barranco (University of Seville)

Trento-Oct-2022-FB.pdf

15:30 Discussion

15:45 Electric dipole polarizability and the neutron skin thickness

Speaker: Xavier Roca-Maza (Università degli Studi di Milano/INFN Sezione di Milano)

Roca-Maza.pdf

16:30 Discussion

16:45 Coffee Break

17:00 Investigation of low-lying dipole strengths using real photonscattering experiments

Speaker: Miriam Müscher (University of Cologne)

Müscher_Trento_2022_upload.pdf

17:35 Discussion

17:45 Resumee of the day 2

Wednesday, 26 October

09:00 → 12:15 Morning session 3: Chair: T.B.A.

09:00 Electric dipole response of nuclei studied by proton scattering

Speaker: Atsushi Tamii (Research Center for Nuclear Physics, Osaka University)

ECT_Tamii_20221026.pdf

09:45 Discussion

10:00 Heavy ion double charge exchange reactions and their role in probing double beta decay nuclear matrix elements

Speaker: Jessica Bellone (University of Catania and INFN-LNS)

ECTstar_talk_Bellone.pdf

10:45 Discussion

11:00 Coffee break

11:30 Evolution of the Pygmy Dipole Resonance in Sn Isotopes

Speaker: Maria Markova (University of Oslo)

12:05 Discussion

12:15 → 14:00 Lunch Break

14:00 → 18:00 Afternoon Session 3

14:00 The photon strength function and its impact on stellar nucleosynthesis

Speaker: Stephane Goriely (Université Libre de Bruxelles)

Goriely.pdf

14:45 Discussion

15:00 Constraining energy density functionals with dipole excitations and parity-violating electron scattering experiments

Speaker: Nils Paar (Faculty of Science University of Zagreb)

Nils Paar_Trento_2022.pdf

15:45 Discussion

16:00 Coffee break

16:30 A Microscopic Approach to the Study of Pygmy and Giant Resonances

Speaker: Nadia Tsoneva (ELI-NP)

NTsoneva_Trento2022.pdf

17:15 Discussion

17:30 Resumee of the day 3

Thursday, 27 October

09:00 → 12:30 Morning Session 4

09:00 The PREX-CREX neutron skin puzzle and energy density functional theory

Speaker: Panagiota Papakonstantinou (IBS)

202210_ECTStar_pbl.pdf

09:45 Discusion

10:00 Spurious states in second RPA and multiphonon calculations

Speaker: František Knapp (Institute of Particle and Nuclear Physics, Charles University, Prague, Czech Republic)

FK_ECT_2022.pdf

10:45 Discussion

11:00 Coffee break

11:30 Beyond-RPA approaches in the equation-of-motion framework

Speaker: Elena Litvinova (Western Michigan University (USA))

Trento-2022-2.pdf

12:15 Discussion

12:30 → 14:00 Lunch Break

14:00 → 16:30 Afternoon Session 4

14:00 Study of dipole resonances with ab initio interactions

Speaker: Mikael Frosini (CEA - DES, IRESNE, DER, SPRC, LEPh)

trento.pptx

14:45 Discussion

15:00 Recent studies on the dipole excitations within the Subtracted Second RPA

Speaker: Danilo Gambacurta (INFN-LNS)

Trento_Dipole_Gambacurta.pdf

15:45 Discussion

16:00 Coffee break

16:30 → 18:00 Panel: Research Perspectives

Conveners: Elena Litvinova (Western Michigan University (USA)), Horst Lenske (U. Giessen)

20:00 → 21:00 Social Dinner

Friday, 28 October

09:00 → 12:15 Morning Session 5

09:00 Accessing the single-particle structure of the PDR

Speaker: Mark-Christoph Spieker (Florida State University)

2022_Trento_Spieker.pdf

09:45 Discussion

10:00 Particle-vibration coupling effect on dipole strength function at finite temperature in the covariant density functional theory framework

Speaker: Herlik Wibowo (Department of Physics, University of York)

Herlik_Wibowo_ECTstar_presentation.pdf

10:45 Discussion

11:00 Coffee break

11:30 Closing remarks

Speakers: Elena Litvinova (Western Michigan University (USA)), Horst Lenske (U. Giessen)

12:15 → 13:00 Lunch Break