[Triumf-seminars] TRIUMF Colloquium today at 14:00

[TRIUMF Seminars]

Date/Time: Wed 2014-03-05 at 14:00

Location:  Auditorium          

Speaker:   Gaute Hagen (Oak Ridge National Laboratory)

Title:     Advances	in  coupled-­cluster computations of  medium mass and neutron rich nuclei	

Abstract: In this talk I will present recent advances and highlights in computing properties of medium mass and neutron rich nuclei using coupled-cluster theory. Building nuclei from scratch is a difficult and challenging undertaking. The coupled-cluster method is a microscopic theory that can naturally account for (i) effects of three nucleon forces, (ii) the presence of open decay channels and particle continuum, and (iii) many-nucleon correlations. All these ingredients are necessary in order to build a framework with predictive capabilities applicable at the extremes of the nuclear chart and with relevance for experimental programs at rare isotope beam facilities. Recently we used coupled-cluster theory to construct ab-initio effective interactions for the shell model, our first application to the spectra of neutron rich oxygen- and carbon isotopes are very promising [1]. Other recent highlights include ab-initio coupled-cluster calculation of the giant dipole resonance in 16O [2], coupled-cluster calculations of neutron rich calcium isotopes, with an emphasis on the evolution of shell structure. In particular we address the question regarding shell closure in 54Ca [3] and address Efimov physics around the very neutron rich isotope 60Ca [4].


[1] “Ab-initio coupled-cluster effective interactions for the shell model: Application to neutron-rich oxygen and carbon isotopes”, G. R. Jansen, J. Engel, G. Hagen, P. Navratil, A. Signoracci, arXiv:1402.2563 (2014).
[2] “First principles description of the giant dipole resonance in 16O”, Sonia Bacca, Nir Barnea, Gaute Hagen, Giuseppina Orlandini, Thomas Papenbrock, Phys. Rev. Lett. 111, 122502 (2013).
[3] “Evolution of shell structure in neutron-rich calcium isotopes”, G. Hagen, M. Hjorth-Jensen, G. R. Jansen, R. Machleidt, T. Papenbrock, Phys. Rev. Lett. 109, 032502 (2012).
[4] “Efimov Physics around the neutron rich Calcium-60 isotope”, G. Hagen, P. Hagen, H.-W. Hammer, L. Platter, Phys. Rev. Lett. 111, 132501 (2013).


Stimulants available 15 minutes before the talk.

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