Constrained Molecular Dynamics
Approach toAlpha-Clustered
Nuclear Systems:Study of
the reaction 28Si+12C at 7.5 MeV/nucleon,
G.
Giuliani; Cyclotron
Institute, Texas A
& M University,College
Station,
Texas USA − Alpha clustering in light even-even nuclei is a
well-known
phenomenon in nuclear physics. Since Alpha particles are bosons,
much attention
has been recently devoted to the possibility of Bose Condensation
in Alpha-cluster
nuclei. Among the existence of Alpha-Clustered nuclear ground
states, interesting
questions are the dynamics of formation of Alpha clusters in
nuclear reactions,
and the determination of the critical temperatures and densities
for the Bose
Condensation phase transition. In
this
work results coming from a novel version of the Constrained
Molecular Dynamics
(CoMD) model, in which Alpha-Cluster correlations have been
included, will be
shown.In this
framework Alpha-cluster
correlations and the Pauli Principle Constraint, the latter being
the main
feature of the CoMD model, coexist; this allows investigation of
the dynamics
of formation and breaking of Alpha-Clusters, into lighter bosons
or
fermions,in
nucleus-nucleus collisions
in which the reaction partners can be N/Z symmetric or asymmetric
systems. Alpha-Cluster
states lie very close to the
threshold energy for the N-Alpha break-up of stable nuclei. The
experiment on
the reaction 28Si+12C at 7.5 MeV/nucleon,
recently
performed at the Cyclotron Institute at Texas A&M University,
makes use of
a Thick Target Inverse Kinematics method in order to search for
N-Alpha decay
of 28Si and 40Ca in the excitation energy
region near
threshold.The
comparison between the
experimental data and the model calculations, along the search of
the Alpha
particles Bose Condensate, will be discussed.