First
Results with the
early implementation of AGATA
Andres
Gadea
CSIC-University
of Valencia, Spain
The
first
implementation of the AGATA [1,2] spectrometer consisting of
five triple germanium
detector clusters has recently completed the experimental
campaign at
Laboratori Nazionali di Legnaro, INFN. This
setup had two major goals, the first one was to validate the
γ-tracking concept
and the second is to perform an experimental physics program
using the stable
beams delivered by the Tandem PIAVE-ALPI accelerator complex. The AGATA setup was
designed to be coupled
with the large-acceptance magnetic spectrometer PRISMA [3].
Therefore, the
in-beam prompt γ-rays detected with AGATA will be measured in
coincidence with
the products of grazing reactions measured by PRISMA. The study of
neutron-rich nuclei is one of the
most challenging problems in nuclear structure. Among the open questions
is of special
interest the evolution of the nuclear effective interactions, in
particular of
the monopole term, due to the tensor interaction, with
consequences in the quenching
of the known shell gaps and development of new ones. Also the evolution of
the nuclear collectivity
towards nuclei with large neutron excess is a consequence of the
modification
of the Single Particle Energies and the evolution of shell gaps.
The aforementioned
questions can be studied in
moderately neutron-rich nuclei populated in
multinucleon-transfer reactions and
deep-inelastic collisions. In
this
contribution we will briefly describe the capabilities of the
setup as well as
several results obtained during the campaign, including the ones
in the
vicinity of 78Ni and in the vicinity of N=40 in the
middle of the
f7/2 shell. A novel
lifetime RDDS
technique developed in collaboration with IKP Cologne as well as preliminary
results in the mentioned
regions will be also discussed. During
2012
the AGATA sub-array will start the experimental campaign at
Fragment
Separator (FRS) PRESPEC setup of the GSI Darmstadt. A brief introduction to
the capabilities of
this new setup will be presented.
[1]
A. Gadea et al., Nucl. Instr. Meth. Phys. Res. A 654, 88
(2011).
[2]
S. Akkoyun et al., Nucl. Instr. Meth. Phys. Res. A 668, 26
(2012).
[3]
A. M. Stefanini et al.,
Nucl. Phys. A701, 109c (2002); A.
Latina et al., Nucl.
Phys. A734, E1
(2004).