Deformation effects in Giant Monopole Resonance

11th International Spring Seminar on Nuclear Physics: Shell Model and Nuclear Structure – achievements of the past two decades

Kvasil, J.^1 ; Nesterenko, V.O.^2 ; Repko, A.^1 ; Bozik, D.^1 ; Kleinig, W.^2,3 ; Reinhard, P.-G.^4

Institute of Particle and Nuclear Physics MFF UK, Charles University, Prague 8

CZ-18000, Czech Republic^1

Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Moscow region, Dubna

141980, Russia^2

Technical University of Dresden, Institute for Analysis, Dresden

D-01062, Germany^3

Institute of Theoretical Physics II, University of Erlangen, Erlangen

D-91058, Germany^4

关键词: Deformation effects;    Deformed nuclei;    Giant monopole resonances;    Giant resonances;    Peak structure;    Quadrupole deformations;    Random phase approximations;    Skyrme-forces;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/580/1/012053/pdf
DOI  :  10.1088/1742-6596/580/1/012053

来源: IOP

【 摘 要 】

The isoscalar giant monopole resonance (GMR) in Samarium isotopes (from spherical144Sm to deformed148-154Sm) is investigated within the Skyrme random-phase- approximation (RPA) for a variety of Skyrme forces. The exact RPA and its separable version (SRPA) are used for spherical and deformed nuclei, respectively. Consistently with earlier investigations, the quadrupole deformation is shown to yield two effects: the GMR broadens and attains a two-peak structure due to the coupling with the quadrupole giant resonance.