IS530 and IS567: Unveiling the properties of intruder states in 34Al and 34Si
by
Stéphane Grévy(CEN Bordeaux-Gradignan)
→
Europe/Zurich
CERN
CERN
Description
It is well known that the nuclear shell structure changes for the most exotic nuclei, see [1] for example. One of the consequences of this phenomenon is the modification of the "classical" magic numbers, as experimentally observed at N=20. Nevertheless, the mechanisms responsible for such changes are still under discussion and more experimental information is needed to better constrain the theoretical models.
The 34Si is located between the magic spherical 36S and the 32Mg, member of the so-called island of inversion, and therefore the structure of this nucleus, and in particular the phenomenon of shape coexistence, is of crucial importance to understand how the intruder configurations progressively dominate the ground state structure of the most exotic nuclei at N=20. The 34Al, precursor of 34Si, is located at the edge of the island of inversion and the nature of its ground state is still underdiscussion.
In this seminar, we are going to report on the discovery of the 0+2 state in 34Si at GANIL [2], discuss new experimental results which have been recently obtained at ISOLDE on the beta decay of 34Mg [3] and discuss new mass measurements from TITAN in this region [4]. These results motivate new experimental studies which will be performed at ISOLDE on september 2015.
[1] O. Sorlin and M. G. Porquet, Progress in Particle and Nuclear Physics, Volume 61, Issue 2, Pages 602
[2] F. rotaru et al, Phys. Rev. Lett.
[3] R. Lica et al, http://isolde.web.cern.ch/sites/isolde.web.cern.ch/files/April%202014.pdf
[4] A. Chaudhuri et al., Phys. Rev. C88(2013)054317
