|
Statut |
Confirmé |
|
Série |
NUC-THEO |
|
Domaines |
nucl-th |
|
Date |
Mercredi 7 Décembre 2016 |
|
Heure |
12:15 |
|
Institut |
IPN |
|
Salle |
IPN, Bât 100, Salle de Conseils, cadre "IPNO-Beihang nucl. str. & dyn" |
|
Nom de l'orateur |
Robin |
|
Prenom de l'orateur |
Caroline |
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Addresse email de l'orateur |
|
|
Institution de l'orateur |
Dep. of Physics,Western Michigan Univ., Kalamazoo, USA |
|
Titre |
Relativistic nuclear field theory and application to isospin-transfer modes |
|
Résumé |
Atomic nuclei are complex systems where single-nucleon and collective
degrees of freedom are deeply intertwined. The nuclear structure
method which I will present is based on the relativistic meson-nucleon
Lagrangian of quantum hadrodynamics and nuclear eld theory. This
approach naturally connects the intermediate-energy scales of mesons
to the low-energy domain of nucleons and their collective motion, and
provides a consistent framework for the description of nuclear
excitations.
Recently, we have extended this formalism to the description of
isospin-transfer modes in open-shell nuclei [1], which have various
applications in nuclear and particle physics as well as astrophysics. In
the charge-exchange channel, the coupling between single-nucleon
degrees of freedom and collective vibrations generates a time-dependent
proton-neutron e ective interaction, in addition to the static pion and
rho-meson exchange, and introduces complex nucleonic congurations
which induce fragmentation and spreading of the resonances. Such
e ects are important to describe the observed quenching of the
transition strength and have a great impact on the computing of
beta-decay rates that govern the r-process nucleosynthesis. I will show
recent results of calculations for spin-isospin excitations and weak
decays in medium-mass nuclei, and will address further developments.
[1] C. Robin and E. Litvinova, Eur. Phys. J. A, 52 (2016). |
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Numéro de preprint arXiv |
|
|
Commentaires |
$ dans le cadre de "IPNO-Beihang collaboration meeting on nuclear structure and dynamics $ |
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Fichiers attachés |
- 2016_12_07_C_Robin_semtheo_poster.pdf (326870 bytes)
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