[Triumf-seminars] TRIUMF Nuclear Physics Seminar today at 15:30

[TRIUMF Seminars]

Date/Time: Mon 2015-01-26 at 15:30

Location:  Auditorium          

Speaker:   Mirko Miorelli (TRIUMF/UBC)

Title:     Giant and pigmy dipole resonances in medium-mass nuclei from chiral nucleon-nucleon interactions

Abstract: The coupled-cluster method and the Lorentz integral transform are combined for the computation of inelastic reactions into the continuum: the bound-state-like equation characterizing the Lorentz integral transform method can be reformulated based on extensions of the coupled-cluster equation-of-motion method. I will show how we compute the giant dipole resonances of 4He, 16,22O, and 40Ca from a chiral nucleon-nucleon interaction at next-to-next-to-next-to-leading order [1]. We find low-lying E1 strength in the neutron- rich 22O nucleus, which compares fairly well with experimental data from GSI [2]. We also compute the electric dipole polarizability in 40Ca. Deficiencies of the employed Hamiltonian lead to overbinding, too-small charge radii, and a too-small electric dipole polarizability in 40Ca [3].

[1] S. Bacca, N. Barnea, G. Hagen, M. Miorelli, G. Orlandini, T. Papenbrock, Phys. Rev. C 90, 064619 (2014)
[2] A.Leistenschneideretal.,Phys.Rev.Lett.86,5442(2001) 
[3] M.Miorellietal,inpreparation.



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