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.

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.

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
2023

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.
17-feb-2023
Settore FIS/04 - Fisica Nucleare e Subnucleare
BRACCO, ANGELA
BRACCO, ANGELA
PARIS, MATTEO
Doctoral Thesis
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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/956067
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