原子核

This class will study some of the changing ideas within modern physics, ranging from relativity theory and quantum mechanics to solid-state physics, nuclear and elementary particles, and cosmology.

本课程将会研究现代物理学中在概念上的变迁，从相对论、量子力学到固态物理、原子核与基本粒子、还有宇宙论。

The classical analog of this state of motion is a straight-line trajectory back and forth through the nucleus.

这个运动状态的经典对应，是通过原子核来回运动的直线轨道。

However, even the atomic number as high as 94, there is no stable nuclei are the same elements found in nature, and this is the natural decay of uranium and thorium.

可是，即使是原子序数高达94，没有稳定原子核的元素都一样能在自然中找到，这就是铀和钍的自然衰变。

This new microscopic description makes it possible to construct various configurations and to trace them as a function of rotational frequency or nuclear shape.

但它对于物理问题的描述有如下局限性：核子间的对关联没有被包括在内；对原子核系统外加轴和旋称对称性限制。

The nucleus of tritium,consisting of two neutron s and one proton.

氘核氘的原子核，由两个中子和一个质子组成

Therefore, one has to use some kind of truncation scheme.

原子核配对壳模型就是基于以上的考虑而提出的。

A view popular in physics is to start with uncharged electrons and cores, which are therefore both free and plane waves and can have any energy, and then fade in the charge.

物理学中流行的方法是从不带电的电子和原子核出发，因为它们是自由的平面波，可以具有任意能量，并在带电后衰减。

This nucleus is composed of positively charged protons , and electrically uncharged neutrons .

原子核中包括带正电的质子，和未带电的中子。

Atomic nuclei consist of combinations of protons, or positively-charged particles, and neutrons, or uncharged particles.

原子核是由质子与种子相结合而构成；之子也叫带正电荷的粒子，中子也叫不带电荷的粒子。

After a consideration of the movement revision of the atomic nucleus,by using a variation wave function of a parameter k to discuss the ground state energy for the B+++ ion to carry on the variation computation..

考虑对原子核运动的修正后，通过使用一个带松弛坐标参数k的变分波函数对B+++离子的非相论基态能量进行了变分计算。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。