- 原子核理論セミナー
原子核理論研究室主催の理論のセミナーです．
- Sendai Nuclear Science Colloquium
萩野, 須田, 田村 にお問い合わせください．

Exploring exotic nuclei within the MCAS framework

Prof. Steven Karataglidis

Univ. Johannesburg, South Africa

日時： 2017年11月22日（水） 15:00 - 16:30

場所： 電子光理学研究センター三神峯ホール

One of the more effective tools for studying low-energy nucleon-nucleus
scattering has been the Multi-Channel Algebraic Scattering (MCAS) method,
which solves the coupled Lippmann-Schwinger equations in momentum space.
A key aspect of the MCAS approach has been the consistent description of
both bound (sub-threshold) and scattering states of the compound system,
with a proper handling of the Pauli Principle. This talk will present
the fundamental aspects of MCAS, at a conceptual as well as mathematical
level,with application to low-energy nucleon-nucleus scattering,
especially those cases leading to compound states of exotic nuclei.

ELPHセミナー

連絡先：萩野, 須田, 田村

Self-Consistent Green's Function Studies of Medium Mass Isotopes

Prof. Carlo Barbieri

Univ. Surrey, UK

日時： 2017年12月1日（金） 15:00 - 16:30

場所： 電子光理学研究センター三神峯ホール

First principle approaches to nuclear structure have seen huge
breakthroughs in recent years. Due to combined advances of theories
of the nuclear interaction (in particular for three-nucleon forces)
and of computational many-body methods isotopes in the upper p-f-g9/2
shell are now under reach. The methods based on, Self-Consistent
Green's Function (SCGF) theory gives a direct access to the spectral
function for nucleon addition/removal, from which one can gain
profound insights on several aspects of nuclear structure.
I will review recent SCGF results for isotopes from Oxygen up to the
Tin Chain, including predictions for masses, radii and dipole
polarizabilities. New models for saturating chiral interactions,
predict improved radii near the valley of stability but with a tendency
to deviate for neutron rich isotopes. This is still leading to accurate
studies, such as the prediction of a proton bubble in 34Si and
order examples.
Complementary work is being done to study nuclear forces derive
directly from Lattice QCD simulation (by the Japanese HALQCD
collaboration). Ab initio applications medium mass nuclei suggest a
curious evolutions of the nuclear chart with respect to the variation
of quark masses, with isolated islands of binding being generated
first when the physical quark-mass limit is approached from above.
Overall the outlook of ab initio theory, as a whole, is that nuclear
forces are currently the largest source of uncertainties in predictions
of exotic and neutron rich isotopes. While new developments are
underway, there is already scope to exploit many-body approaches on
several outstanding of nuclear physics problems.

ELPH セミナー

連絡先：萩野, 須田, 田村