BETA DECAY STUDIES AS A TOOL TO INVESTIGATE NUCLEAR STRUCTURE IN THE N-RICH PO-FR REGION AND IN P-RICH CD ISOTOPES

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.

Grantor dc:publisher

Università degli Studi di Milano

Year dc:date

2023

Author dc:creator

• POLETTINI, MARTA

Contributors dc:contributor

• tutor: A. Bracco
• G. Benzoni ; coordinatore: M. Paris
• M. Polettini
• BRACCO, ANGELA
• PARIS, MATTEO

• Settore FIS/04 - Fisica Nucleare e Subnucleare

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

eng

Identifier

http://dx.doi.org/10.13130/polettini-marta_phd2023-02-17
10.13130/polettini-marta_phd2023-02-17

OAI identifier oai:identifier

oai:air.unimi.it:2434/956067