辐射不透明度

In this thesis, the contribution of electric quadrupole (E2) and higher pole transitions to the opacity of hot and dense plasmas of element aurum is taken into account by using an average-atom model.

因此本文在有心力场单电子近似下，利用平均原子模型研究了电四极及更高阶跃迁对金元素的高温稠密等离子体辐射不透明度的贡献。

The author discussed the effect of opacity on stellar evolution and concentrated on the mechanism of triggering blue loop by using Padova stellar model. It shows that extended mixing at the bottom of the convective envelope changed the interior hydrogen profile, which triggers or suppresses blue loop. Laboratory astrophysics, which is a cross subject of astrophysics and plasma physics, combines the demand of accurate data of radiative opacity with the latest advances in high intense lasers to devise the third independent method to study the radiative opacity. On the basis of the comparison between stellar material and laser-produced plasma in terrestrial laboratory, the desirable way to study opacity in laboratory and the brief introduction to the experiments relative to opacity are given.

本论文就开展辐射不透明度实验室研究的背景、内容和意义进行了介绍，并在对实验室的激光等离子体和天体环境下的恒星物质两者差异和相关性的认识基础上，论证了开展辐射不透明度实验室研究的可行性，而且对世界上正在开展的类似研究予以简要介绍，期望可以将天体物理领域对辐射不透明度数据可靠程度的质疑以及对其准确数值的广泛要求，与激光等离子体物理实验的最新进展相结合，推进辐射不透明度实验室研究，为辐射不透明度的研究开拓了继天文观测和理论计算的第三种独立的手段。

Detailed studies have been carried out to demonstrate the effects of the autoionization resonances on the radiative opacity and transmission.

研究了电离阈以上的自电离共振对光谱分辨的辐射不透明度和透射谱的影响。

2C. Can high metallicity be responsible for enhanced Li depletion in these stars?

在类太阳恒星中金属不透明度的增加也可能致使辐射层及对流层之间能量的交换。

This paper present the radiative opacities of iron of the isothermal sequence of 20eV at the densities of 10~(-2)g/cm~3, 10~(-3)g/cm~3 and 10~(-4)g/cm~3 using an average atom approach with modification of the transition energy.

本文使用考虑谱线位置偏移的AA模型计算了铁等离子体在温度20eV密度10~(-2)g/cm~3、10~(-3)g/cm~3和10~(-4)g/cm~3条件下的辐射不透明度。

M. More and the photon absorption coefficients of hydrogen-like ions, the mean ionization states and radiative opacities for medium and low Z plasmas have been calculated.

M。 More提出的改进型平均原子模型和类氢离子的光吸收系数，计算了中低Z元素等离子体的平均电离度及辐射不透明度。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。