Search for three alpha states around an 16O core in 28Si
Search for three alpha states around an 16O core in 28Si
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搜索 28Si 中 16O 核心周围的三个 α 态
DOI：
10.1103/physrevc.86.031303
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发表时间：
2012
影响因子：
3.1
通讯作者：
T. .Kokalova and W. von Oertzen
中科院分区：
文献类型：
--
作者：
T. Ichikawa;N. Itagaki;Y. Kanada-En'yo;T. .Kokalova and W. von Oertzen
研究了Si中O核周围三粒子弱耦合类气体态的存在性。我们采用基于O +3团簇模型的多组态混合方法计算了Si的激发态。我们还包括了用生成坐标法制备的O +C和Mg+基波函数。为了识别类气体态，我们用几何簇波函数和Tohsaki-Horiuchi-Schuck-Röpke（THSR）波函数计算了类气体态的等振荡跃迁强度和重叠。结果表明，所得到的第四和第十二态与THSR波函数有明显的重叠。这两种状态显然与O +C团簇状态共存，以相似的能量出现。这两个状态之间的计算的等振荡强度是显着的大，表明状态的激发模式的成员。此外，计算得到的这些态的均方根半径还表明，在O核表面可能存在一层类似气体的三粒子，在出现类似Hoyle三态之前的中间态中，这层气体可以被描述为“二维气体”.
We investigate the existence of weakly coupled gaslike states comprised of threeparticles around anO core inSi. We calculate the excited states inSi using the multiconfiguration mixing method based on theO+3cluster model. We also include theO+C andMg+basis wave functions prepared by the generator coordinate method. To identify the gaslike states, we calculate the isoscalar monopole transition strengths and the overlap of the obtained states with the geometrical cluster wave function and the Tohsaki-Horiuchi-Schuck-Röpke (THSR) wave function. The results show that the obtained fourth and twelfth states significantly overlap with the THSR wave function. These two states clearly coexist with theO+C cluster states, emerging at similar energies. The calculated isoscalar monopole strengths between those two states are significantly large, indicating that the states are members of the excitation mode. Furthermore, the calculated root-mean-square radii for these states also suggest that a layer of gaslike threeparticles could exist around the surface of theO core, which can be described as a “two-dimensional gas” in the intermediate state before the Hoyle-like three-states emerge.