English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Background: The quasiparticle random phase approximation (QRPA), within theframework of the nuclear density functional theory (DFT), has been a standardtool to access the collective excitations of the atomic nuclei. Recently,finite amplitude method (FAM) has been developed, in order to perform the QRPAcalculations efficiently without any truncation on the two-quasiparticle modelspace. Purpose: We discuss the nuclear giant dipole resonance (GDR) in heavyrare-earth isotopes, for which the conventional matrix diagonalization of theQRPA is numerically demanding. A role of the Thomas-Reiche-Kuhn (TRK) sum ruleenhancement factor, connected to the isovector effective mass, is alsoinvestigated. Methods: The electric dipole photoabsorption cross section wascalculated within a parallelized FAM-QRPA scheme. We employed the Skyrme energydensity functional self-consistently in the DFT calculation for the groundstates and FAM-QRPA calculation for the excitations. Results: The mean GDRfrequency and width are mostly reproduced with the FAM-QRPA, when compared toexperimental data, although some deficiency is observed with isotopes heavierthan erbium. A role of the TRK enhancement factor in actual GDR strength isclearly shown: its increment leads to a shift of the GDR strength tohigher-energy region, without a significant change in the transitionamplitudes. Conclusions: The newly developed FAM-QRPA scheme shows a remarkableefficiency, which enables to perform systematic analysis of GDR for heavyrare-earth nuclei. Theoretical deficiency of photoabsorption cross sectioncould not be improved by only adjusting the TRK enhancement factor, suggestingthe necessity of beyond the self-consistent QRPA approach, and/or a moresystematic optimization of the EDF parameters.

Finite amplitude method applied to giant dipole resonance in heavy rare-earth nuclei