arXiv · 1309.3320
High-spin transition quadrupole moments in neutron-rich Mo and Ru nuclei: testing $γ$ softness?
Abstract
The transition quadrupole moments, $Q_{t}$, of rotational bands in the neutron-rich, even-mass $^{102-108}$Mo and $^{108-112}$Ru nuclei were measured in the 8 to 16 $\hbar $ spin range with the Doppler-shift attenuation method. The nuclei were populated as fission fragments from $^{252}$Cf fission. The detector setup consisted of the Gammasphere spectrometer and the HERCULES fast-plastic array. At moderate spin, the $Q_{t}$ moments are found to be reduced with respect to the values near the ground states. Attempts to describe the observations in mean-field-based models, specifically cranked relativistic Hartree-Bogoliubov theory, illustrate the challenge theory faces and the difficulty to infer information on $γ$ softness and triaxiality from the data.
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J. B. Snyder, W. Reviol, D. G. Sarantites, A. V. Afanasjev, R. V. F. Janssens, H. Abusara, M. P. Carpenter, X. Chen, C. J. Chiara, J. P. Greene, T. Lauritsen, E. A. McCutchan, D. Seweryniak, S. Zhu. 2013-09-12. High-spin transition quadrupole moments in neutron-rich Mo and Ru nuclei: testing $γ$ softness?. https://doi.org/10.1016/j.physletb.2013.04.046
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