标题： 氦-4三原子系统中的结合能和散射观测量 显示英文标题

标题： Binding Energies and Scattering Observables in the 4^He_3 Atomic System

摘要： 氦-4三聚体束缚态以及氦-4原子与氦-4二聚体在超低能量下的散射特性，采用Faddeev微分方程的硬核版本进行了研究。 使用了各种现实的氦-4—氦-4相互作用势，其中包括Aziz和Slaman提出的LM2M2势，以及Tang、Toennies和Yiu最近提出的TTY势。 得到的基态和激发（Efimov）态与其他结果进行了比较。 计算了质心能量高达2.45毫开尔文时的散射长度和原子-分子相移。 研究发现，尽管LM2M2和TTY势具有相当不同的结构，但它们给出的束缚态和散射结果基本相同。 显示英文摘要

摘要： The ^4He_3 bound states and the scattering of a ^4He atom off a ^4He dimer at ultra-low energies are investigated using a hard-core version of the Faddeev differential equations. Various realistic ^4He-^4He interactions were employed, amomg them the LM2M2 potential by Aziz and Slaman and the recent TTY potential by Tang, Toennies and Yiu. The ground state and the excited (Efimov) state obtained are compared with other results. The scattering lengths and the atom-diatom phase shifts were calculated for center of mass energies up to 2.45 mK. It was found that the LM2M2 and TTY potentials, although of quite different structure, give practically the same bound-state and scattering results.