Electric dipole response of 6He: Halo-neutron and core excitations
Electric dipole response of 6He: Halo-neutron and core excitations
复制标题
6He 的电偶极子响应：晕中子和核心激发
DOI：
10.1103/physrevc.89.064303
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发表时间：
2014
影响因子：
3.1
通讯作者：
and Y. Suzuki
中科院分区：
文献类型：
--
作者：
D. Mikami;W. Horiuchi;and Y. Suzuki
通过全微观六体计算研究了电偶极子 () 响应。基态和激发态的波函数表示为显式相关高斯函数的叠加。明确考虑了三体衰变通道的最终状态相互作用。得到的基态性质和低能强度与观测结果一致。在强度函数中发现两个主峰和几个小峰。高能区的峰值代表了巨大偶极子共振（异相质子中子运动）的典型宏观图像。较低峰的跃迁密度在内部区域表现出同相质子中子运动，在表面区域附近表现出异相运动，以及空间延伸的中子振荡，表明软偶极子模式及其振动激发模式。还检查了压缩偶极子强度与软偶极子模式的关系。
Electric dipole () response ofis studied with a fully microscopic six-body calculation. The wave functions for the ground and excited states are expressed as a superposition of explicitly correlated Gaussians. Final state interactions of three-body decay channels are explicitly taken into account. The ground state properties and the low-energystrength are obtained consistently with observations. Two main peaks as well as several small peaks are found in thestrength function. The peak at the high-energy region indicates a typical macroscopic picture of the giant dipole resonance, the out-of-phase proton-neutron motion. The transition densities of the lower-lying peaks exhibit in-phase proton-neutron motion in the internal region, out-of-phase motion near the surface region, and spatially extended neutron oscillation, indicating a soft-dipole mode and its vibrationally excited mode. The compressional dipole strength is also examined in relation to the soft-dipole mode.