Speaker
Description
The experiments with light exotic nuclei near nuclear driplines are of great interest, since such isotopes and their are poorly studied. One of the types of reactions is proton radioactivity, where nuclei near proton dripline emit 1, 2 or even 4 protons in a decay mode.
The EXPERT (EXotic Particle Emission and Radioactivity by Tracking) project is a part of the SuperFRS (Super Fragment Separator) Experiment collaboration at FAIR (Facility for Antiproton and Ion Research), GSI, Darmstadt. The main goal of the project is to study nuclear systems in the vicinity of neutron and proton driplines, as well as to investigate the mechanisms of exotic decays. The EXPERT project uses a variety of detector systems, including tracking silicon microstrip detectors FOOT (FragmentatiOn Of Target), which are the main focus of the presented work.
One of the yet unobserved light exotic isotopes is 7C, where a true four-proton decay is anticipated. Other subjects of interest include 5Be and 6Be, in both of which two-proton decay is expected. Study of the angular correlations of 7C decay products will also help to better understand the properties of its mirror isotope 7H.
This work presents preliminary results of the data analysis of the experiment conducted at FRS in May 2025. In order to populate the exotic nuclei of interest the experiment used a 9Be secondary target and 9C, 7Be secondary beams produced by fragmentation of 12C. The presentation covers the FOOT detectors analysis, including their alignment, correlation with standard FRS detectors and ALPIDE (ALICE PIxel DEtectors), particle identification of the heavy fragments of the decays (4He and 3He), reconstruction of tracks and vertices.
