Speaker
Dr
Nadezda Smirnova
(Centre d'Etudes Nucléaires de Bordeaux-Gradignan)
Description
The isospin symmetry is a useful symmetry in nuclear physics, which provides
important guidelines for the construction of the nucleon-nucleon interaction and
can largely simplify the formalism of some nuclear structure models.
However, it is an approximate symmetry, broken due to the up and down quark mass
difference and electromagnetic interactions between the quarks.
Experimental studies of proton-rich nuclei and precision measurements call for
an accurate theoretical description of isospin-symmetry breaking effects.
The talk will focus on recent achievements in the construction of precise
isospin-nonconserving Hamiltonians mainly in the framework of the nuclear shell model.
Phenomenological approaches will be compared with the first
charge-dependent microscopic effective interactions.
We will review recent applications to the structure and decay of nuclei near N=Z line
and proton-rich nuclei.
Then, we will show the importance of charge-dependent theoretical description of nuclear states
for the tests of the fundamental symmetries in nuclear weak decays
(such as superallowed Fermi beta decay),
as well as we will underline its relevance for some astrophysically important reaction rates.
