Abstract
This letter reports lifetime measurements of excited states in the odd-N nucleus 163W using the recoil-distance Doppler shift method to probe the core polarising effect of the i13/2 neutron orbital on the underlying soft triaxial even-even core. The ratio B(E2:21/2+→17/2+)/B(E2:17/2+→13/2+) is consistent with the predictions of the collective rotational model. The deduced B(E2) values provide insights into the validity of collective model predictions for heavy transitional nuclei and a geometric origin for the anomalous B(E2) ratios observed in nearby even-even nuclei is proposed.
Highlights
The emergence of collective phenomena in atomic nuclei is a central paradigm in many-body quantum physics
The dashed line is the ratio predicted by the collective rotational model for even-N isotopes
The ratio of extracted B(E2) reduced transition probabilities are found to be consistent with the predictions of the collective rotational model
Summary
The emergence of collective phenomena in atomic nuclei is a central paradigm in many-body quantum physics.
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