Enhancement of octupole strength in near spherical nuclei

Abstract

The validity of the rotational formula used to compute E1 and E3 transition strengths in even-even nuclei is analyzed within the Generator Coordinate Method framework based on mean field wave functions. It turns out that those nuclei with spherical or near spherical shapes the E1 and E3 strengths computed with this formula are strongly underestimated and a sound evaluation of them requires angular momentum projected wave functions. Results for several isotopic chains with proton number equal or near magic numbers are analyzed and compared with experimental data. The use of angular momentum projected wave functions greatly improves the agreement with the scarce experimental data.

7 pages, 4 figures

References in corpus (3)

• The sign of the overlap of HFB wave functions
• Application of the gradient method to Hartree-Fock-Bogoliubov theory
• Ground state octupole correlation energies with effective forces

Cited by in corpus (7)

• Landscape of pear-shaped even-even nuclei
• Anatomy of octupole correlations in ${}^{96}$Zr with a symmetry-restored multidimensionally-constrained covariant density functional theory
• Microscopic origin of reflection-asymmetric nuclear shapes
• Microscopic description of quadrupole-octupole coupling in actinides with the Gogny-D1M energy density functional
• Systematic Trends of 0${}_2^{+}$, 1${}_1^{-}$, 3${}_1^{-}$ and 2${}_1^{+}$ Excited States in Even-Even Nuclei
• Generator coordinate method for nuclear octupole excitations: status and perspectives
• Spectroscopy of low spin states in 157Dy: Search for evidence of enhanced octupole correlations