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7H ground state as a 3H+4n resonance
Physics Letters B ( IF 4.3 ) Pub Date : 2022-08-08 , DOI: 10.1016/j.physletb.2022.137367
Emiko Hiyama , Rimantas Lazauskas , Jaume Carbonell

We have investigated the possible existence of a 7H resonant state, considered as a five-body system consisting of a 3H core with four valence neutrons. To this aim, an effective n-3H potential is constructed in order to reproduce the low energy elastic neutron scattering on 3H phase shifts and the 5H resonant ground state in terms of 3H-n-n system. The variational Gaussian Expansion Method is used to solve the 5-body Schrödinger equation, while the resonant state parameters were estimated by means of the stabilization method. We have not found any sign of a narrow low energy resonance in the vicinity of 3H+4n threshold. However, we have identified a very broad structure at ER9 MeV above this threshold, which corresponds to the 7H J=π1/2+ ground state. In the vicinity of this state, we have also identified a broad structure corresponding to the ground state of 6H isotope with quantum numbers Jπ=2.



中文翻译:

7H 基态作为 3H+4n 共振

我们已经研究了7 H 共振态的可能存在,被认为是由一个3 H 核心和四个价中子组成的五体系统。为此,构建了一个有效的n- 3 H 势能,以再现3 H 相移上的低能弹性中子散射和3 H-nn 系统的5 H 共振基态。五体薛定谔方程采用变分高斯展开法求解,谐振状态参数采用稳定法估计。我们在3附近没有发现任何狭窄的低能量共振的迹象H+4n 阈值。然而,我们已经确定了一个非常广泛的结构R9MeV 高于此阈值,对应于7 H J=π1/2+基态。在该状态附近,我们还确定了对应于具有量子数的6 H同位素的基态的宽结构Ĵπ=2-.

更新日期:2022-08-08
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