The simplest strange three-body halo
The simplest strange three-body halo
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最简单的奇异三体光环
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
D. Fedorov
中科院分区：
文献类型：
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作者：
A. Cobis;A. Jensen;D. Fedorov
用最近发展起来的在坐标空间中求解Faddeev方程的方法研究了弱束缚晕核。为了达到收敛和高精度，对长距离进行了仔细的处理。我们使用了几组两体相互作用，再现了氘的性质，并提供了接近两个Nijmegen势的低能-核子散射数据。我们表明，除非要求超三电子结合能的精度优于50keV，否则势的细节是不重要的。我们发现，当-核子分离能约为130keV时，核子相互作用最重要的参数--单重态S波的散射长度必须在1.85fm的10%以内。核子相互作用的其他细节对超三子结构来说不那么重要。计算了α粒子在氚上的散射长度和有效射程。在这种情况下，将三体问题简化为两体问题的折叠模型被研究，并被发现是不充分的。
The recently developed method to solve the Faddeev equations in coordinate space is used to study the weakly bound halo nucleus . The long distances are treated carefully to achieve convergence and high accuracy. We use several sets of two-body interactions which reproduce the deuteron properties and provide the low-energy - nucleon scattering data close to that of two of Nijmegen potentials. We show that the details of the potentials are unimportant unless the accuracy of the hypertriton binding energy is required to be better than 50 keV. We find that the most significant parameter of the - nucleon interaction, the singlet s-wave scattering length, must be within 10% of 1.85 fm, when the -separation energy from the deuteron is about 130 keV. Other details of the - nucleon interaction are less important for the hypertriton structure. The scattering length and effective range are computed for scattering of a -particle on a deuteron. The folding model reducing the three-body problem to a two-body problem is investigated in this context and found to be inadequate.