Lifetime measurements of excited states in 163W and the implications for the anomalous B(E2) ratios in transitional nuclei
Lifetime measurements of excited states in 163W and the implications for the anomalous B(E2) ratios in transitional nuclei
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163W 激发态的寿命测量及其对过渡核中异常 B(E2) 比率的影响
DOI:
10.1016/j.physletb.2019.134998
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发表时间:
2019
影响因子:
4.4
通讯作者:
Lewis M
中科院分区:
文献类型:
--
作者:
Lewis M
This letter reports lifetime measurements of excited states in the odd-N nucleus 163 W using the recoil-distance Doppler shift method to probe the core polarising effect of the i 13/2 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.
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