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首页> 外文期刊>The European Physical Journal, A. Hadrons and Nuclei >The halo of the exotic nucleus ~(11)Li: a single Cooper pair
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The halo of the exotic nucleus ~(11)Li: a single Cooper pair

机译：外来核〜（11）Li的光环：单个库珀对

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If neutrons are progressively added to a normal nucleus, the Pauli principle forces them into states of higher momentum. When the core becomes neutron saturated, the nucleus expels most of the wave function of the last neutrons outside to form a halo, which, because of its large size, can have a lower momentum. It is an open question how nature stabilizes such a fragile system and provides the glue needed to bind the halo neutrons to the core. Here, we show that this problem is similar to that of the instability of the normal state of an electron system at zero temperature solved by Cooper, a solution which is at the basis of BCS theory of superconductivity. By mimicking this approach using, aside from the bare nucleon-nucleon interaction, the long wavelength vibrations of the nucleus ~(11)Li, the paradigm of halo nuclei, as tailored glues of the least bound neutrons, we are able to obtain a unified and quantitative picture of the observed properties of ~(11)Li.
机译：如果将中子逐渐添加到正常原子核中，则保利原理迫使它们进入较高的动量状态。当堆芯中子饱和时，原子核将最后一个中子的大部分波函数排出到外部，形成晕，由于其大尺寸，其动量较低。一个悬而未决的问题是自然界如何稳定这种脆弱的系统，并提供将晕圈中子束缚到核心所需的胶水。在这里，我们证明这个问题类似于Cooper解决的电子系统正常状态在零温度下的不稳定性问题，该问题是基于BCS超导理论的解决方案。通过模仿这种方法，除了使用裸核子-核子相互作用之外，作为最小束缚中子的特制胶，原子核〜（11）Li（晕圈核的范式）的长波振动是可以得到的。和〜（11）Li的观察性质的定量照片。

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