Toroidal, compressive, and $E1$ properties of low-energy dipole modes in $^{10}$Be,
Toroidal, compressive, and $E1$ properties of low-energy dipole modes in $^{10}$Be,
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$^{10}$Be 中低能偶极子模式的环形、压缩和 $E1$ 属性，
DOI：
10.1103/physrevc.95.064319
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发表时间：
2017
影响因子：
3.1
通讯作者：
Y. Kanada-En'yo and Y. Shikata
中科院分区：
文献类型：
--
作者：
Naoki Tsukamoto;Takao Kitamura;Koki Nakajima;Hideki Asada;Y. Kanada-En'yo and Y. Shikata
我们基于一个扩展的反对称分子动力学模型研究了偶极激发，该模型可以描述1 p-1h激发和大振幅团簇模。环向和压缩偶极算子被发现是很好的证明，以分离的低能和高能部分的等谐偶极激发，分别。得到了两个低能态，即MeV的环形主导态和MeV的主导态。通过对跃迁电流密度的分析，我们认为该态是一种具有奇异环形中子流的环形偶极模，这种奇异环形中子流是由变形团簇的旋转引起的，而该态是一种中子-皮振荡模，其特征是表面中子流和内部的等密度流是由表面中子对核的振荡引起的。
We studied dipole excitations inbased on an extended version of the antisymmetrized molecular dynamics, which can describe 1p-1h excitations and large amplitude cluster modes. Toroidal and compressive dipole operators are found to be good proves to separate the low-energy and high-energy parts of the isoscalar dipole excitations, respectively. Two low-energystates, the toroidal dominantstate atMeV and thedominantstate atMeV, were obtained. By analysis of transition current densities, thestate is understood as a toroidal dipole mode with exotic toroidal neutron flow caused by rotation of a deformedcluster, whereas thestate is regarded as a neutron-skin oscillation mode, which are characterized by surface neutron flow with inner isoscalar flow caused by the surface neutron oscillation against thecore.