Covalently bound molecular structures in the α + 16O system
Covalently bound molecular structures in the α + 16O system
复制标题
α+16O系统中的共价键分子结构
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
W. Oertzen
中科院分区：
文献类型：
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作者：
W. Oertzen
利用中子共价分子轨道的概念和局部 α + 16O 势的已知特性，讨论了氖同位素中不对称分子结构的形成。回顾了 21Ne 宇称双峰的实验证据，并提出了 Ex = 0-8 MeV 中等激发能量下 21Ne 态的相应能带结构。一些能带的结构可以解释为由由 σ 和 π 轨道中的共价中子束缚的本征不对称 ( 4He + 16O) 结构组成。建议将观察到的结构扩展到镁同位素和较重原子核的对称分子结构。特别是镁同位素的形状异构体，即 (He)2O 分子，可以预测，并提出了扩展的 Ikeda 图。
Using the concept of covalent molecular orbitals for neutrons and the known properties of the local α + 16O potential the formation of asymmetric molecular structures in neon isotopes is discussed. Experimental evidence for parity doublets in 21Ne is reviewed and a corresponding band structure for the states in 21Ne at moderate excitation energy of Ex = 0-8 MeV is proposed. The structure of some bands can be interpreted as consisting of an instrinsic asymmetric ( 4He + 16O) structure bound by a covalent neutron in σ and π orbitals. An extension of the observed structures to symmetric molecular structures in isotopes of Mg and heavier nuclei is suggested. In particular shape isomers in isotopes of magnesium, namely (He)2O molecules, can be predicted and an extended Ikeda diagram is proposed.