BETA DECAY STUDIES AS A TOOL TO INVESTIGATE NUCLEAR STRUCTURE IN THE N-RICH PO-FR REGION AND IN P-RICH CD ISOTOPES
Tesi di Dottorato
Data di Pubblicazione:
2023
Citazione:
BETA DECAY STUDIES AS A TOOL TO INVESTIGATE NUCLEAR STRUCTURE IN THE N-RICH PO-FR REGION AND IN P-RICH CD ISOTOPES / M. Polettini ; tutor: A. Bracco, G. Benzoni ; coordinatore: M. Paris. Dipartimento di Fisica Aldo Pontremoli, 2023 Feb 17. 35. ciclo, Anno Accademico 2022.
Abstract:
Beta decay is the most common form of radioactive decay, occurring in isotopes of all known elements along the nuclear chart. This makes it a formidable tool to probe the internal structure of nuclei both on the proton- and neutron-rich exotic nuclei, at the limit of the existence of the nucleus.
The work presented in this thesis is focused on experimental results from two experiments performed using the FRS+DESPEC setup at GSI-FAIR in spring 2021 The two experiments aimed at studying two different regions of the nuclear chart, extending from the heavy n-rich side around A~225 towards the p-rich 100Sn region.
The main results from the analysis of the heavy n-rich region is the first measurement of β-decay half-lives. A comparison with theoretical models highlights the role of first-forbidden transition and are fundamental inputs for the description of the r-process nucleosynthesis.
The second part of the thesis is focused on the study of the β-delayed decay pattern in 100,101,102Cd. New levels were added to the level scheme of 101Cd, and compared to large-scale shell model calculations. In 100,102Cd, the measured relative γ-intensities suggest the possible existence of a low-spin isomer in 100,102In. Such results extend the present knowledge on nuclear structure in the region.
Tipologia IRIS:
Tesi di dottorato
Elenco autori:
M. Polettini
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