Conveners
Session 9
- Dario Vretenar (Physics Department, University of Zagreb)
Direct reactions are fundamental tools to investigate the structure of exotic nuclei. Stud-
ies of nuclei far away from stability are usually performed with secondary radioactive beams,
that su er from low intensities and need to be compensated with thick targets and high
e cient detection systems to increase luminosity. Active targets are invaluable devices that,
among other important...
A series of sub-barrier transfer experiments have been recently carried out at LNL, with reaction products detected in inverse kinematic and at forward angles with the large solid angle magnetic spectrometer PRISMA. We measured transfer cross sections far below the Coulomb barrier, making excitation functions down to very low energies. At these low energies, corresponding to very large...
Proton-neutron pairing and α-like quartet condensation in N=Z nuclei
Nicolae Sandulescu
National Institute of Physics and Nuclear Engineering, Magurele-Bucarest, Romania
A specific feature of N = Z nuclei is the occurrence of α -like quartet structures, composed by two neutrons and two protons, which have strong internal...
We present a theoretical framework for treating the full excitation spectrum of Jπ = 0+ pair addition modes, including the well-known low-lying and bound Pairing Vibration on par with the predicted Giant Pairing Vibration lying in the continuum [1]. Our formalism includes the coupling to low-energy collective quadrupole modes of the core, in such a way that both single-particle self-energy...
The $^4$He nucleus is one of the simplest nuclear systems. No bound excited states are present in its level scheme however, a pronounced resonance with the same spin and parity (0$^+$) as the ground state exists with a centroid slightly above the proton emission energy threshold. The results from several available studies show discrepancies on the determination of the $^4$He(0$^+_2$) resonance...
