Geochemical analysis of the Chang'e-6 lunar samples has shown that their concentration of trace elements such as thorium, uranium and potassium is markedly different from the samples retrieved by the Apollo missions and the Chang'e-5 mission.

对嫦娥六号月球样本的地球化学分析显示，其微元素如、钾的浓度与阿波罗任务嫦娥五号任务所回收的样本有显著不同。

Intel scientists investigating the problem found that even trace amounts of uranium and thorium in the ceramic were sufficient to cause problems.

调查该问题的英特尔科学家发现， 陶瓷中即使含有微的也足以引起问题。

Curie soon found that the element thorium emitted similar radiation.

居里很快发现，元素也释出类似的辐射。

Granite is richer in thorium than other igneous, that is, once molten.

花岗岩中的含比其他火成岩，也就是曾经熔融过的岩石，要丰富。

Now, why are thorium and uranium interesting?

现在，为什么很有趣？

So for example, if that uranium atom is at an excited state when it decays in to thorium, it can simultaneous release gamma waves as well as the alpha particle I already mentioned.

所以例如，如果那个原子在衰变成的时候处于激发态， 它就可以同时释γ射线以及我之前提到的α粒子。

The heat is a leftover from  Earth's formation and from from the decay of radioactive elements like thorium and uranium  that shower the crust with a constant wave of radioactivity.

热是地球形成时遗留下来的，以及射性元素衰变产生的，这些射性元素不断向地壳释出持续的射性波。

The alpha particles emitted by uranium and thorium were energetic and ionizing enough to create electron hole pairs in the silicone.

发射的阿尔法粒子能大， 电离性强， 足以在硅中形成电子空穴对。

One of the decay products of thorium is actinium-225, and actinium-225 is one of the most promising medical isotopes there is.

的衰变产物之一是锕-225，而锕-225是目前最具前景的医用同位素之一。

The helium nucleus obviously has a plus 2 charge, and the thorium atom would have a negative charge as well.

氦核显然带有+2电荷，而原子也会带有负电荷。

The ages of these flowstones can be determined by the ratio within them of the radioactive elements uranium and thorium.

这些流石的年龄可以通过其中射性元素的比例来确定。

All this background radiation comes from radon in the air and uranium and thorium in the soil.

所有这些背景辐射都来自空气中的氡以及土壤中的。

Even though the thorium emits an electron we don't use the usual symbol for electrons.

尽管会发射电子，但我们并不使用通常的电子符号。

Since you have lost two of these protons it is not uranium anymore it is thorium.

因为你失去了两个质子，所以它不再是了，而是。

These are vials of thorium that produce actinium-225.

这些是产生锕-225的试管。

Once we know that, its atomic number, then we can figure out that this is going to be thorium.

一旦我们知道了它的原子序数，我们就可以算出这就是。

Rock such as basalt and thorium is radioactive.

像玄武岩这样的岩石具有射性。

Using traces of two other elements, uranium and thorium, they were able to date both stalagmites.

利用这两种其他元素的痕迹，他们能够确定这两种石笋的年代。

So for the last 25 years, researchers at Oak Ridge have had what they call thorium cows that they essentially milk.

因此，在过去25年里，橡树岭的研究人员拥有他们所谓的“牛”，他们实际上是在挤奶。

To make granite though requires a number of separate distillations which is what gives it high thorium concentrations.

不过，要形成花岗岩则需要多次独立的分馏作用，这也就是为什么它具有高浓度的原因。