原子序数

Measuring the intensities of both high-and low-energy gamma-rays,the two parameters of formation density and equivalent atomic number,which is related to the formation lithology, can be derived at the same time.

同时测量散射伽玛射线的高能部分和低能部分，可以获得地层密度和与地层岩性有关的等效原子序数这两个参数。

In study of ICF, polystyrene hollow micro-spheres are one of the most important targets because of its low density and atomic number.

在ICF 靶丸研究中，PS空心微球是主要的靶型之一，由于PS 靶具有低密度、低原子序数，可以降低辐射驱动内爆实验过程中燃料预热及流体力学不稳定性，提高实验效率，并且有利于实验过程中诊断，所以PS 靶愈来愈受到重视并很快得以发展。

The atomic number of an element is the ...

一个元素的原子序数是

Any element having an atomic number greater than 92; all are radioactive.

原子序数在以后的元素，都是放射性元素。

British physicist who determined that the atomic number of an element can be deduced from the element's x-ray spectrum.

莫斯利，亨利·格温·杰弗里斯1887－1915英国物理学家，提出一种元素的原子序数能够从这种元素的x光射线光谱中推断出来

Isotopes have the same atomic number but different mass numbers.

同一元素的同位素有相同的原子序数不同的质量数。

Alpha particles have two positive charges and a mass of four atomic mass units; they are identical to helium nuclei.

因为α粒子有两个正电荷，质量为4，射出后产生的子核的正核电荷和原子序数都比母核小两单位，质量小四单位。

What is represented by the symbol AZX is an atomic species called a nuclide of the element X, having an atomic number Z and a mass number A.

符号AZX代表的是元素X的一种核素，其原子序数是Z，质量数为A。

No change in atomic number is possible without a radical change in properties.

性质不发生根本的改变，原子序数的改变是不可能的。

R is a reference referring to effective atomic number directly.

R是与有效原子序数直接相关的量。

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。