Speaker
Description
Report on the AGATA experiment n. 59 (Phase 2)
LNL PAC 25.022
AGATA Collaboration Council 2026
A. Gottardo$^1$, F. Angelini$^2$, M. Caamaño$^3$, D. Stramaccioni$^1$, J.J. Valiente-Dobón$^4$ and the AGATA and PRISMA collaborations
$^1$LNL-INFN, Italy, $^2$GSI, Germany, $^3$University of Santiago de Compostela, Spain, $^4$IFIC, Spain
The experiment 25.022 (AGATA number 59) was performed at the INFN Laboratori Nazionali di Legnaro in July 2026. Its primary goal was to measure the lifetimes of excited states in neutron-rich fission fragments around N = 50 and below Z = 40, providing key constraints on the evolution of shell structure and collectivity in this region of the nuclear chart. A $^{238}$U beam at 6.2 MeV/u and an average intensity of about 0.4 pnA impinged on a Be target mounted on a plunger device at the center of the AGATA-PRISMA setup. Fission fragments were identified event by event with the PRISMA magnetic spectrometer, positioned at 24° relative to the beam axis. Approximately eleven days of beam on target were devoted to measurements at several target-degrader distances (100, 300, 500, 900 µm). First near-line γ-ray spectra will be presented, together with an overview of the production yields achieved for the nuclei of interest. The analysis plan, current limitations, and future perspectives will also be briefly discussed.