Florence Training Workshop on Coulomb Excitation

Jan 27, 2025, 9:30 AM → Jan 30, 2025, 5:30 PM Europe/Rome

Room 13, first floor (Venue: Università degli Studi di Firenze - Dipartimento di Storia, Archeologia, Geografia, Arte e Spettacolo)

Adriana Nannini (Istituto Nazionale di Fisica Nucleare), Marco Rocchini (Istituto Nazionale di Fisica Nucleare), Naomi Marchini (Istituto Nazionale di Fisica Nucleare)

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Low-energy Coulomb excitation is capable of providing unique information on static electromagnetic moments of short-lived excited nuclear states, including non-yrast states. The process selectively populates low-lying collective states and is ideally suited to study phenomena such as shape coexistence and the development of exotic deformation (triaxial or octupole shapes). Historically, these experiments were restricted to stable isotopes. However, the advent of new facilities providing intense beams of short-lived radioactive species has opened the possibility of applying this powerful technique to a much wider range of nuclei.

In this training workshop, the low-energy Coulomb excitation technique and the dedicated analysis codes will be introduced, for use at state-of-the-art experimental setups available in Europe and the rest of the world. We will discuss the observables that can be measured, their relation to nuclear structure parameters with a particular focus on the nuclear shape, and the assumptions used in the data analysis. Some recent examples of complex Coulomb-excitation studies will be presented. During the practical sessions, the participants will learn how to use the GOSIA code to perform simulations and data analysis. Also, the so-called "unsafe" Coulomb excitation will be discussed and instructions on how to use FRESCO for Coulomb excitation will be provided.

Lecturers: Daniel Doherty, Paul Garrett, Kasia Hadynska-Klek, Naomi Marchini, Marco Rocchini, Kasia Wrzosek-Lipska, Magda Zielinska

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Important information

• The deadline for registration is the 29th of November, the acceptance notification will be sent by the following week.
• There is no fee for the participants, who will have to organize their accommodation and meals.
• As this is a hands-on course, the number of participants will be limited.
• Each participant will need to use their own laptop for the practical sessions.
• Limited funds for travel and meal expenses are available thanks to the INTRANS activity. If needed, please contact the organizers for further information.

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Workshop Poster

Monday, January 27

9:30 AM → 10:00 AM Registration

10:00 AM → 11:00 AM Theoretical description of low-energy Coulomb excitation

11:00 AM → 11:30 AM Coffee break

11:30 AM → 12:30 PM Experimental perspective: observables and detection set-ups

2:30 PM → 3:30 PM Normalisation in Coulex experiments

3:30 PM → 4:30 PM Introduction to GOSIA calculations

4:30 PM → 5:30 PM GOSIA practical session 1

Tuesday, January 28

9:30 AM → 10:30 AM Quadrupole sum rules and nuclear shapes

10:30 AM → 11:00 AM Coffee break

11:00 AM → 12:30 PM GOSIA practical session 2

2:30 PM → 3:30 PM Shape coexistence studied with Coulex. The role of complementary data.

3:30 PM → 4:30 PM Model assumptions in Coulex analysis

4:30 PM → 5:30 PM GOSIA practical session 2

Wednesday, January 29

9:30 AM → 11:00 AM GOSIA practical session 3

11:00 AM → 11:30 AM Coffee break

11:30 AM → 12:30 PM GOSIA practical session 4

2:30 PM → 5:30 PM GOSIA practical session 5

Thursday, January 30

9:30 AM → 11:00 AM Unsafe Coulex

11:00 AM → 11:30 AM Coffee break

11:30 AM → 12:30 PM Introduction to FRESCO

2:30 PM → 5:30 PM FRESCO practical session