Particle interaction measured at low energy and relativistic energies
by
Rakesh KUMAR(IUAC Inter University Accelerator Centre, New Delhi, India)
→
Europe/Rome
LNL Meeting Room (INFN LNL)
LNL Meeting Room
INFN LNL
Description
In recent years the region of tin isotopes has been intensively investigated both from experimental and theoretical perspectives. In particular, the excitation energies and the reduced transition probabilities across the Z=50 chain has been examined in detail. This constitutes the longest shell-to-shell chain of semi-magic nuclei investigated in nuclear structure to date. Radioactive ion beams yield new experimental results close to the doubly-magic 100Sn and 132Sn, but very accurate data of the stable mid-shell nuclei are also of great relevance for our understanding of nuclear structure. The less known B(E2↑) values in 112Sn and 114Sn motivated two Coulomb excitation experiments to improve these crucial data points and to firmly establish the location along the Sn isotope chain where the B(E2↑) value is increased. At GSI we performed two consecutive measurements using 114Sn and 116Sn beams on the 58 Ni targets. In the experiment carried out at IUAC, New Delhi, targets of 112Sn and 116Sn were bombarded with 58Ni beam. Results of these two experiments and there comparison with LSSM and RQRPA calculations will be presented in first part of my talk.
In neutron deficient Sn isotopes for which Coulomb excitation experiments are presently not possible due to lack of sufficient beam intensities, decay studies can be performed to obtain the level scheme in these exotic nuclei. In a fragmentation reaction, angular momenta are transferred to the nuclei of interest, which can be measured after the separation in the fragment separator (FRS) using an efficient gamma array. These experiments require an active stopper detector in order to measure the implantation of the heavy ions as well as its decay properties such as electrons, protons and alpha particles. In the second part of my talk the realization of the active stopper consisting of six double sided silicon strip detector (DSSSD) will be presented.
