Possible quenching of static neutron pairing near the N=98 deformed shell gap: Rotational structures in Gd160,161
Year: 2021
Type: article
Abstract: A $^{160}\mathrm{Gd}$ beam was accelerated to an energy of 1000 MeV and, separately, bombarded thick targets of $^{154}\mathrm{Sm}$ and $^{164}\mathrm{Dy}$ in order to observe neutron-rich, rare-earth nuclei via deep-inelastic collision processes. Gammasphere was utilized to observe $\ensuremath{\gamma}$-ray emissions. Many new states and transitions were observed in $^{160}\mathrm{Gd}$ as a result of so-called unsafe Coulomb excitation. The ground-state band in $^{160}\mathrm{Gd}$ has been extended to ${I}^{\ensuremath{\pi}}={20}^{+}$ and a rotational band based on the ${K}^{\ensuremath{\pi}}={4}^{+}$ state, previously associated with a hexadecapole vibration, was observed up to ${18}^{+}$. The quasiparticle configuration of the ${K}^{\ensuremath{\pi}}={4}^{+}$ band has been determined, and its unusual alignment behavior may result from a possible quenching of static neutron pairing. In addition, the band based on the [523]5/2 quasineutron orbital in $^{161}\mathrm{Gd}$ was extended from $11/{2}^{\ensuremath{-}}$ to $33/{2}^{\ensuremath{-}}$ and also displays the same unusual alignment behavior.
Source: Physical Review C
Authors: D. J. Hartley, K. Villafana, F. G. Kondev, M. A. Riley, R. V. F. Janssens, K. Auranen, A. D. Ayangeakaa, J. S. Baron, A. J. Boston, M. P. Carpenter, J. A. Clark, J. P. Greene, J. Heery, C. R. Hoffman, P. Jackson, T. Lauritsen, J. Li, D. Little, E. S. Paul, G. Savard, D. Seweryniak, J. Simpson, S. Stolze, G. L. Wilson, J. Wu, S. Zhu, S. Frauendorf
Institutions: United States Naval Academy, Florida State University, Argonne National Laboratory, University of North Carolina at Chapel Hill, Duke University, Triangle Universities Nuclear Laboratory, University of Liverpool, Daresbury Laboratory, Louisiana State University, University of Notre Dame
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1020856811, G102163711, G107546177, G1313983767, G1664757510, G1760870335, G222768804, G2287611682, G262962599, G2887060908, G2896472831, G3075337988, G3117306614, G3681142727, G3830869494, STUDIES OF NUCLEAR PROCESSES., G4351005601, G4462628492, G498139845, RUI: Shape Evolution and Isomers in the Neutron-Rich, Rare-Earth Region, G5106849484, G513797252, G5572984593, STUDIES OF NUCLEAR PROCESSES, G6359570598, Structure of Superheavy Nuclei, STUDIES OF NUCLEAR PROCESSES, G6806410290, G6848031779, G6918803902, STUDIES OF NUCLEAR STRUCTURE USING NEUTRONS AND CHARGED PARTICLES, STUDIES OF NUCLAR STRUCTURE USING NEUTRONS AND CHARGED PARTICLES, G7368700025, Studies of Nuclear Reactions and Structure, G757476141, STUDIES OF NUCLEAR STRUCTURE USING NEUTRONS AND CHARGED PARTICLES, G9000028243, G9000324543, G9000341538, G969889393, G993149817
OpenAlex ID: W3139942912