Yrast states in the neutron-rich Si-33(14)19 nucleus have been studied using binary grazing reactions produced by the interaction of a 215-MeV beam of S-36 ions with a thin Pb-208 target. An experimental setup that combines the large-acceptance magnetic spectrometer PRISMA and the high-efficiency gamma-ray detection array CLARA was used in the experiment. Four new gamma-ray photopeaks at energies of 971, 1724, 1772, and 2655 keV were observed and assigned to the Si-33 level scheme. The experimental level scheme is compared with the results of 1h omega p-sd-pf large-scale shell-model calculations using the recently developed PSDPFB effective interaction; good agreement is obtained. The structure of the populated states of Si-33 is discussed within the context of an odd neutron coupled to states of the Si-32 core.
Intruder negative-parity states of neutron-rich Si-33
POLLAROLO, Giovanni;
2010-01-01
Abstract
Yrast states in the neutron-rich Si-33(14)19 nucleus have been studied using binary grazing reactions produced by the interaction of a 215-MeV beam of S-36 ions with a thin Pb-208 target. An experimental setup that combines the large-acceptance magnetic spectrometer PRISMA and the high-efficiency gamma-ray detection array CLARA was used in the experiment. Four new gamma-ray photopeaks at energies of 971, 1724, 1772, and 2655 keV were observed and assigned to the Si-33 level scheme. The experimental level scheme is compared with the results of 1h omega p-sd-pf large-scale shell-model calculations using the recently developed PSDPFB effective interaction; good agreement is obtained. The structure of the populated states of Si-33 is discussed within the context of an odd neutron coupled to states of the Si-32 core.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
