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Conférences et séminaires » Séminaire présenté par T. BHATTACHARJEE

Séminaire présenté par T. BHATTACHARJEE

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High spin spectroscopy in the La-Ce region.

(Variable Energy Cyclotron Centre Bidhan Nagar, Kolkata, India)

le Lundi 17 septembre 2007 à 16h00

Salle de Visioconférences - Bâtiment 25
IPHC, 23 rue du Loess, Strasbourg-Cronenbourg

Abstract :

The nuclei in the La-Ce region with neutron numbers close to N=82 shell closure are important to study in order to look at the interplay between the single particle and collective modes of excitation and their contribution in the development of high spin states. In these nuclei the proton particles are in the low Ω h11/2 orbital driving the nucleus to prolate shape and the neutron hole occupy the high Ω h11/2 orbital which drives it to oblate shape. So, it is interesting to study the different shape driving forces and their effects on the shape of these nuclei. We are systematically studying these nuclei with N=79, 80 and 81 to look at the evolution of the structure of the nuclei with the change in proton and neutron number. In the talk mainly the experimental results and some theoretical interpretation on the high spin structures of the nuclei with N=79 and N=80 will be discussed, which have been studied using the different phases of the Indian National Gamma Array.

As a future projection the gamma spectroscopy group of the Variable Energy Cyclotron Centre is also planning some experiments for studying the neutron rich nuclei using Deep Inelastic Transfer reactions and preliminary results of such an experiment will also be conveyed in the seminar. It is very important to develop some tools to be used as tagging devices with the gamma array to select different reaction channels and we have taken some initiative towards such development. A brief status of the development will be given at the end. Personnes a contacter :

Sandrine COURTIN

Florent HAAS