玻色子亲态比系数的公式（II）：四玻色子亲态比系数的显示式

本文推导出四个全同玻色子的亲态比系数的显示式，这种公式在相互作用玻色子模型中用玻色子有效相互作用计算核谱时很有用     

玻色子亲态比系数的公式(Ⅰ)——三玻色子亲态比系数的显示式

本文推导出三个全同玻色子的亲态比系数的显示式,这些公式在相互作用玻色子模型中用玻色子有效相互作用计算核谱时很有用.     

玻色子表面相互作用与核谱 二

我们用玻色子表面与力作为玻色子之间的有效相互作用力，并用ｓｄ玻色子组态混合波函数研究了一些四玻色子核的低伏能谱。理论计算的结果和实验的符合程度令人满意，表明这种模型是合理的，成功的。     

四玻色子核E2跃迁几率的研究

作者曾经用相互作用玻色子模型中的玻色子有效相互作用研究核谱，本文用玻色子组态混合波函数计算三个四玻色子核的Ｅ２跃迁几率，由能量矩阵的对角化得出组成混合波函数，理论计算的结果和实验的符合程序是令人满意，表明这种模型是成功的。     

玻色子表面δ相互作用研究sdgIBM1核谱

用ｓｄｇＩＢＭ１的组态混合波函数和玻色子表面δ相互作用研究三玻色子核的能谱，理论计算结果令人满意，能拟合比ｓｄｇＩＢＭ１多得多的能级，误差还更小，说明ｇ玻色子起着重要的作用，进一步证明这种模型是成功的。     

sdIBM用1／N展开技术的高阶修正项

By utilizing the 1/N expansion technique(ONET), the analytical expressions of energy spectrum, deformation parameter and reduced matrix elements of E2 transition given from a consistent Q framwork in the sd interacting boson model are compared with the re     

Observation of a one-dimensional Tonks-Girardeau gas

We report the observation of a one-dimensional (1D) Tonks-Girardeau (TG) gas of bosons moving freely in 1D. Although TG gas bosons are strongly interacting, they behave very much like noninteracting fermions. We enter the TG regime with cold rubidium-87 atoms by trapping them with a combination of two light traps. By changing the trap intensities, and hence the atomic interaction strength, the atoms can be made to act either like a Bose-Einstein condensate or like a TG gas. We measure the total 1D energy and the length of the gas. With no free parameters and over a wide range of coupling strengths, our data fit the exact solution for the ground state of a 1D Bose gas.     

Intermediate bosons: weak interaction couriers

Recent progress toward a complete theory of the weak interactions has led to sharper predictions for the properties of the hypothetical weak-force particles known as intermediate bosons. The history of speculations about intermediate bosons is briefly summarized and the (as yet negative) searches carried out for these particles are reviewed. Prospects for future searches-both direct ad indirect-are surveyed, and the consequences of finding the expected or unexpected are noted.     

钦州市经济发展与生态建设互动研究

经济发展与生态建设互动是指经济系统诸要素与生态系统诸要素的良性互动,其目标是实现生态经济共赢。在分析钦州市生态经济互动发展制约因素、互动动力和互动条件的基础上,提出制度互动、投入互动和产业互动3个途径,以期实现钦州市经济与生态共赢。     

Observation of Fermi pressure in a gas of trapped atoms

We report the attainment of simultaneous quantum degeneracy in a mixed gas of bosons (lithium-7) and fermions (lithium-6). The Fermi gas has been cooled to a temperature of 0.25 times the Fermi temperature by thermal collisions with the evaporatively cooled bosons. At this temperature, the spatial size of the gas is strongly affected by the Fermi pressure resulting from the Pauli exclusion principle and gives clear experimental evidence for quantum degeneracy.