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

We study theoretically the low-energy electric-dipole response of N=20isotones. We present results from a quasiparticle random-phase approximation(QRPA) and a continuum random-phase approximation (CRPA), and we compare themwith results for the mirror Z=20 nuclei. According to our analysis, enhanced E1strength is expected energetically well below the giant dipole resonance in theproton-rich isotones. Large amounts of E1 strength in the asymmetric N=20isotones are predicted, unlike their equally asymmetric Z=20 mirror nuclei,pointing unambiguously to the role of structural effects such as loose binding.A proton-skin oscillation could develop especially in 46Fe. The properdescription of non localized threshold transitions and the nucleon effectivemass in mean-field treatments may affect theoretical predictions. We call forsystematic theoretical investigations to quantify the role bulk-matterproperties, in anticipation of measurements of E1 transitions in proton-richnuclei.

Proton pygmy resonances: predictions for N=20 isotones