Shape coexistence in the neutron-deficient even-even (182-188)Hg isotopes studied via coulomb excitation.
Shape coexistence in the neutron-deficient even-even (182-188)Hg isotopes studied via coulomb excitation.
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通过库仑激发研究了缺中子偶-偶 (182-188)Hg 同位素的形状共存。
DOI：
10.1103/physrevlett.112.162701
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发表时间：
2014
影响因子：
8.6
通讯作者：
Bree N
中科院分区：
文献类型：
--
作者：
Bree N
利用REX-ISOLDE的光束进行了研究放射性均匀汞同位素电磁特性的库仑激发实验。提取了耦合基态和低处激发态的约简矩阵元的大小和相对符号。利用四极和规则方法推导了地面变形和第一激发态的信息。结果表明，基态有轻微的变形，呈扁圆形，而激发态有较大的变形。结果与超平均场和基于相互作用玻色子的模型进行了比较，并在双态混合模型中进行了解释。与模型计算结果部分吻合。两种不同结构的存在，在轻等质量汞同位素共存，在低激发能是牢固确立的。
Coulomb-excitation experiments to study electromagnetic properties of radioactive even-even Hg isotopes were performed withbeams from REX-ISOLDE. Magnitudes and relative signs of the reducedmatrix elements that couple the ground state and low-lying excited states inwere extracted. Information on the deformation of the ground and the first excitedstates was deduced using the quadrupole sum rules approach. Results show that the ground state is slightly deformed and of oblate nature, while a larger deformation for the excitedstate was noted in. The results are compared to beyond mean field and interacting-boson based models and interpreted within a two-state mixing model. Partial agreement with the model calculations was obtained. The presence of two different structures in the light even-mass mercury isotopes that coexist at low excitation energy is firmly established.
影响因子：
3.5
作者：
P. Brussaard;P. Glaudemans;A. Klein
通讯作者：
P. Brussaard;P. Glaudemans;A. Klein