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Low-lying dipole response in the stable 40,48Ca nuclei within the second random-phase approximation
Gambacurta D., Grasso M., Catara F.
Dans AIP Conference Proceedings - Nuclear structure and dynamics II, Opatija : Croatie (2012) - http://hal.in2p3.fr/in2p3-00748803
Physique/Physique Nucléaire Théorique
Low-lying dipole response in the stable 40,48Ca nuclei within the second random-phase approximation
D. Gambacurta1, M. Grasso2, F. Catara
1 :  GANIL - Grand Accélérateur National d'Ions Lourds
http://www.ganil-spiral2.eu
CNRS : UPR3266 – IN2P3 – CEA : DSM/GANIL
Bvd Henri Becquerel - BP 55027 - 14076 CAEN CEDEX 5
France
2 :  IPNO - Institut de Physique Nucléaire d'Orsay
http://ipnweb.in2p3.fr
CNRS : UMR8608 – IN2P3 – Université Paris XI - Paris Sud
IPN - 15, rue Georges Clemenceau - 91406 ORSAY CEDEX
France
The low-lying dipole strength distributions of 40Ca and 48Ca, in the energy region between 5 and 10 MeV, are studied within the second random phase approximation (RPA) with Skyrme interaction. Standard RPA models do not usually predict any presence of strength in this energy region, while experimentally a significant amount of strength is found. The inclusion of the 2 particle -2 hole configurations allows to obtain a description in a rather good agreement with the experimental data. The properties of the most collective state are analyzed in terms of its 1 particle -1 hole nature and its transition densities.

Communications avec actes
2012
10/07/2012
AIP Conference Proceedings
internationale
1491
T. Niksic, M. Milin, D. Vretenar, S. Szilzer
186-189
American Institute of Physics
AIP Conference Proceedings

Nuclear structure and dynamics II
Opatija
Croatie
09/07/2012
13/07/2012

GANIL 2012-116 T
21.60.Jz,21.10.Re,27.40.+z
Pygmy – Exotic Nuclei – Strength Distributions – Linear Response