M. V. Andrés

Pygmy dipole resonances: open problems

E.G. Lanza, L. Pellegri, A. Vitturi, M. V. Andrés

Abstract The low-lying dipole states, known as Pygmy Dipole Resonances (PDR) have been studied at length for several nuclei and several isotopes. Many properties have been acquired and understood by the theoretical and experimental studies of the isovector and isoscalar response of …

it, Afrique du Sud (code pays fourni par la source)

Theoretical studies of Pygmy Resonances

E.G. Lanza, L. Pellegri, A. Vitturi, M. V. Andrés

it, Afrique du Sud (code pays fourni par la source)

Studying the Pygmy Dipole Resonances with isoscalar and isovector probes

E.G. Lanza, A. Vitturi, M. V. Andrés

Abstract We present a short review of the properties of the so-called Pygmy Dipole Resonance (PDR) which can be studied with both isovector and isoscalar probes. This is possible due to the particular property of this new mode where the isoscalar and …

it (code pays fourni par la source)

Gamma ray detection with CHIMERA at LNS: results and perspectives

G. Cardella, Francisco Favela, Nunzia Simona Martorana, Luis Acosta et autres

Abstract We describe the use of the 4tt CHIMERA charged particle detector as a large efficiency y-ray detector. The CsI(Tl) stage of the CHIMERA telescope is used to detect and identify y-rays. The high detection efficiency and the sufficient energy resolution guaranteed …

it, mx, es, fr (code pays fourni par la source)

Low-lying dipole and quadrupole states

E.G. Lanza, L. Pellegri, M. V. Andrés, F. Catara et autres

it, Afrique du Sud (code pays fourni par la source)

On the nature of the Pygmy Dipole Resonance in 68 Ni

Nunzia Simona Martorana, G. Cardella, E.G. Lanza, Luis Acosta et autres

We report results obtained studying the Pygmy Dipole Resonance (PDR) in 68Ni. The experiment was undertaken at INFN-LNS in Catania by means of an isoscalar probe, above the neutron emission threshold. In detail, we show the method used to obtain information about …

First measurement of the isoscalar excitation above the neutron emission threshold of the Pygmy Dipole Resonance in 68Ni

Nunzia Simona Martorana, G. Cardella, E.G. Lanza, Luis Acosta et autres

The excitation of the Pygmy Dipole Resonance (PDR) in the 68Ni nucleus, above the neutron emission threshold, via an isoscalar probe has been observed for the first time. The excitation has been produced in reactions where a 68Ni beam, obtained by the …

it, mx, es (code pays fourni par la source)

Experimental Study of the Pygmy Dipole Resonance in the $^{68}$Ni Nucleus

Nunzia Simona Martorana, G. Cardella, E.G. Lanza, Luis Acosta et autres

It is known that the low-energy E1 strength, known as the Pygmy Dipole Resonance (PDR), can be excited by both isovector and isoscalar probes. In this work, we report on the results of an experiment, carried out at the LNS-INFN in Catania, …

it, mx, es (code pays fourni par la source)

Isospin effects on reaction dynamics at Fermi energies

G. Politi, Luis Acosta, M. V. Andrés, Lucrezia Auditore et autres

The study of nuclei properties and of collision dynamics is a very active research field whose result have implications in different domains as for example astrophysics. The present and future facilities delivering radioactive ion beams with high intensity allow to extend these …

it, mx, es, fr, pl, ru, uz (code pays fourni par la source)

Nuclear excitations as coupled one and two random-phase-approximation modes

D. Gambacurta, F. Catara, M. Grasso, Michelangelo Sambataro et autres

We present an extension of the random-phase approximation (RPA) where the RPA phonons are used as building blocks to construct the excited states. In our model, that we call double RPA (DRPA), we include up to two RPA phonons. This is an …

ro, it, fr, es (code pays fourni par la source)

Basic Concepts in Nuclear Physics: Theory, Experiments and Applications

J. E. García-Ramos, Clara E. Alonso, M. V. Andrés, Francisco Pérez-Bernal

es (code pays fourni par la source)

Microscopic nuclear form factor for the pygmy dipole resonance

E.G. Lanza, A. Vitturi, M. V. Andrés, F. Catara

Pygmy dipole resonance can be populated via isoscalar probes due to the strong mixing of isoscalar and isovector components. The physical quantities are usually extracted by the use of reaction theory calculations. There, the most important ingredient is the form factor which …

it, es (code pays fourni par la source)