7-11 July 2014
Africa/Johannesburg timezone
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Beta-decay spectroscopy of neutron-rich nuclei

Presented by Mr. Lucky MAKHATHINI on 8 Jul 2014 from 17:10 to 19:00
Type: Poster Presentation
Session: Poster1
Track: Track B - Nuclear, Particle and Radiation Physics
Board #: B.227

Abstract

The nucleus is a complex quantum-mechanical entity governed by the strong, weak, and electromagnetic forces acting between the constituent nucleons, which can be finally bound into various finite nuclear systems. The aim of nuclear-structure research is to obtain experimental information that can be confronted with results from theoretical models in order to improve our understanding of the atomic nucleus. In this project we intent to develop a tape station to be used at Flerov Laboratory of Nuclear Reactions at Joint Institute for Nuclear Research, Russia and at iThemba Laboratory For Accelerator Based Science, South Africa. The primary goal is to study the β-decay of nuclei in the vicinity of the closed neutron shells at N=82 and N=126 at iThemba LABS and FLNR-JINR, respectively. At iThemba LABS, neutron-rich nuclei will be produced via fission reactions while at FLNR-JINR transfer reactions will be used. In these facilities, the neutron-rich reaction products will be separated using selective laser-ionization, accelerated to ~ 50 keV and transported to a measuring station (tape station) where γ-rays from excited states populated by β-decay will be observed. The tape station will be used to reduce the background from the decay chain to stability, by using a tape to transport the unwanted activity away from the detectors. These measurements will give information vital to understanding the nuclear shell model and shell structure in the neutron-rich regions, possibly answering questions like: are magic numbers still valid in very neutron-rich nuclei far from the line of stability? Recently, theoretical work suggest that they are not. The planned facilities at iThemba LABS and FLNR-JINR will be described.

Award

Yes

Level

PhD

Supervisor

Dr RA Bark, bark@tlabs.ac.za, iThemba LABS

Paper

no

Place

Room: D Ring ground level


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