Nuclear reactions can be understood as exposing nuclei to external fields, Coulomb or nuclear. ENSAR-2 exotic beam facilities (ISOLDE, GANIL and GSI-FAIR) provide different time scales for the external fields, associated to the collision time. The complementarity of these measurements will be discussed. Astrophysically relevant reaction rates in stellar environments imply averages over...
.The capabilities of HIE-ISOLDE are well matched to a broad range of experimental nuclear astrophysics studies. In this talk I will review recent works relevant to x-ray bursts and core collapse supernovae, and will present some of the proposals in these and other areas presently awaiting beam time.
.Understanding energy production and nucleosynthesis in stars requires a precise knowledge of the nuclear reaction rates at the energies of interest. To overcome the experimental difficulties arising from the small cross sections at those energies and from the presence of the electron screening, the Trojan Horse Method has been introduced. The method represents one of the most powerful tools...
.Some of the questions in nuclear physics for astrophysics and the news on methods we use in the laboratory to answer them will be reviewed, with emphasis on what the new large experimental facilities can bring.
Also will discuss about NUSPRASEN’s planned activities for nuclear astrophysics.
.Exotic nuclei play an important role in many astrophysical
environments, in particular the collase of massive stars and
r-proccess nucleosynthesis. During the collapse, the composition of
the core is dominated by intermediate mass neutron-rich nuclei. Due to
the high temperatures and densities, electrons can be captured on
nuclei removing the major source of pressure support and...
In this presentation, I will expose some of the last developmentsin microscopic nuclear structure calculations for exotic nuclei far from stabilitity [1].
In a first part, I will expose recent study on the development of collectivity in neutron-rich nuclei around N=40, where recent experimental evidence suggest a rapid change from the spherical to rotational regime, in analogy to the island...
.High resolution laser spectroscopy gives access to properties of nuclear ground states and long-lived (> 5ms) isomeric states of radioactive nuclei far from stability, such as nuclear spins, nuclear magnetic and quadruple moments and charge radii [1]. These fundamental properties of exotic nuclei provide important information for the investigation of the nuclear structure in different regions...
.The QRPA approach, well known to be adapted for giant resonance description, is also a good formalism to describe low energy vibrational states for all multipolarities and parities with the same accuracy. We will present selected recent successful results obtained within the QRPA approach using the Gogny interaction.
First, we will compare the first 2+ collective state obtained in QRPA and...
.The concept of nuclear shape plays an important role in our present understanding of nuclear structure. For that reason it is important to have methods to infer the shape of a nucleus in any state of excitation or in particular in its ground state. In this talk I will describe how a proper measurement of the beta strength in beta decay studies can provide in particular cases information about...
.Coulomb excitation is one of the rare methods available to obtain information on static electromagnetic moments of short-lived excited nuclear states, including collective non-yrast levels. In the scattering of two nuclei, the electromagnetic field that acts between them causes their excitation. The process selectively populates low-lying collective states and is therefore ideally suited to...
