Probing the nature of the conjectured low-spin wobbling bands in atomic nuclei
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Date
2022
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
The precession of an atomic nucleus can be approximately described as wobbling motion, arising from the coupling of a rotation and a harmonic vibration. Recently, a number of wobbling bands were reported at low spin, which violate the wobbling approximation that can be valid only at high spin. In the present work, we explore the nature of the reported low-spin wobbling bands. Via a new experiment including both angular correlation and linear polarization measurements, we demonstrate that one such band in 187Au is generated by dominant single-particle excitation rather than by the excitation of a wobbling phonon. Assessing the experimental proofs and discussions to assign the reported low-spin wobbling bands, we further point out that the imperfect research paradigm used previously would lead to unreliable identification of low-spin wobbling bands.
Description
Keywords
Precession, Wobbling, Angular correlations, Linear polarization Model, calculation
Citation
Guo S, Zhou X, Petrache C et al. Probing the nature of the conjectured low-spin wobbling bands in atomic nucleiPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, (2022), 828