Microscopic analysis of E1 and M1 strengths in 156Gd
Seminars
Seminar on low-energy nuclear physics
Date and Time: Friday, 12 May 2023, at 2:30 PM
Venue: Blokhintsev Hall (4th floor), Bogoliubov Laboratory of Theoretical Physics; online seminar on Zoom
Information about seminar and link to join online
Seminar topic: “Microscopic analysis of E1 and M1 strengths in 156Gd”
Authors: V. O. Nesterenko1,2, P. I. Vishnevskiy1,2,3, A. Repko4, J. Kvasil5,
P.-G. Reinhard6
1 – BLTP JINR
2 – Dubna State University
3 – Institute of Nuclear Physic Almaty, Almaty Region, Kazakhstan
4 – Institute of Physics, Slovak Academy of Sciences, Bratislava, Slovakia
5 – Institute of Particle and Nuclear Physics, Charles University, Praha, Czech Republic
6 – Institut für Theoretische Physik II, Universität Erlangen, Germany
Speaker: Petr Vishnevskiy
The dipole electric (E1) and magnetic (M1) strengths in strongly deformed 156Gd are investigated within a fully self-consistent Quasiparticle Random Phase Approximation (QRPA) with Skyrme forces SVbas, SG2 and SLy6. We consider, on the same theoretical footing, pygmy dipole resonance and isovector giant dipole resonance in E1 channel and orbital-scissors and spin-flip resonances in M1 channel. Besides E1 toroidal and low-energy M1 spin-flip excitations are inspected. The calculations show a good agreement with available experimental data for exception of the recent NRF measurements
(M. Tamkas et al., Nucl. Phys. A 987, 79 (2019) where, in contradiction with our calculations and previous (p,p’) data, almost no M1 strength was observed at 4 – 6 MeV.