浮法玻璃拉引向和横向热膨胀系数的差异性分析

热膨胀系数是玻璃的重要物理性质之一,是评价其热稳定性和封接匹配性的关键热学性能指标。利用仪器法测试浮法玻璃板的拉引向、横向热膨胀系数时存在微小的差异性。利用双丝法测试玻璃板的拉引向、横向热膨胀系数时,不存在差异性。

Spin Symmetry in Dirac-Attractive Radial Problem and Tensor Potential

In this paper,we solve the Dirac equation under spin symmetry limit for attractive radial potential including a Coulomb-like tensor interaction.By using the parametric generalization of the Nikiforov-Uvarov method,the energy eigenvalues equation and the corresponding wave functions have been obtained in closed forms.Some numerical results are given too.