真空衰变的基本条件是存在强电场。
The essential condition for the decay of the vacuum is the presence of an intense electric field.
氦是钍和铀元素数千年放射性衰变的副产品。
Helium is the by product of millennia of radioactive decay from the elements thorium and uranium.
地质年代通常是通过矿物中发现的各种放射性元素的衰变率来获得的。
Geological dates are usually obtained by using the rates of decay of various radioactive elements found in minerals.
这些矿物可以用放射性衰变技术测定年代，因为它们所含的放射性微量元素非常少。
These minerals can be dated by radioactive decay techniques because of the very small quantities of radioactive trace elements they, in turn, contain.
然后，它与它的伙伴们将会几乎在瞬间衰变为大批寿命更短的微粒子，其中有一些能被检测出来。
Both it and its companions would then decay almost instantly into a plethora of less fleeting bits, some of which could be detected.
这么大的原子核不可能是稳定的，但在足够长的时间内，在真空附近组装一个原子核以观察真空的衰变是可能的。
A nucleus that large cannot be stable, but it might be possible to assemble one next to a vacuum for long enough to observe the decay of the vacuum.
然而，大约在同一时间，科学家们意识到彗星可能含有衰变的放射性同位素，这些同位素可能使彗星内部的温度升高到导致内部进化的温度。
About the same time, though, scientists realized comets might contain decaying radioactive isotopes that could have warmed cometary interiors to temperatures that caused the interiors to evolve.
无意义介导的衰变检查是否存在过早的无意义密码子。
Nonsense-mediated decay checks for the presence of premature nonsense codons.
法扬斯和索迪的放射性位移定律被用来描述α和β衰变的产物。
The radioactive displacement law of Fajans and Soddy was formulated to describe the products of alpha and beta decay.
最新实验研究结果在高灵敏度水平上展现了粲夸克偶素物理中的强衰变之谜。
Recent experimental results defined nature of the hadronic decay puzzle in charmonium physics.
当它衰变时，它以稳定的氦气形式存在。
放射性碘的半衰期为八天，几周内自然衰变。
Radioactive iodine has a half-life of eight days and decays naturally within weeks.
阿尔法粒子是氦核，它们是放射性衰变的产物。
Alpha particles are these helium nuclei, and they are the result of radioactive decay.
随着时间推移，碳14将衰变为常规的碳12。
氡来自镭的衰变。
反中子逃离大气，然后在高得多的区域衰变为反质子。
The antineutrons escape the atmosphere and then decay into antiprotons at much higher altitudes.
不过不止这种方式，粒子还有另外其它三种衰变方式。
Not only that, but there are three ways that particles can decay.
假定我们有某种放射性原子，它们以一定的几率衰变。
Suppose we've got some sort of radioactive atom, which has a certain chance of decaying.
这个新发现“在衰变中变成普通夸克"，Punzi说。
The new discovery "is decaying in normal quarks, " Punzi said.
任何的不稳定和轨道衰变都能通过推进器和机载发动机修正。
Any instability or orbital decay can be corrected with thrusters and an onboard engine.
质量极小且不带电的中微子，是在核反应和粒子衰变中产生的。
Neutrinos, which have no charge and very little mass, form out of nuclear reactions and particle decays.
这样的装置有助于发现证实更多的假说现象，如质子的稀有衰变。
Such facilities could search for other hypothesized phenomena such as the extremely rare decay of protons.
原子内的一个中子衰变后会产生一个质子、一个电子和一个中微子。
When a neutron inside an atom decays, it produces a proton, an electron, and a neutrino.
一旦反应堆关闭，它仍热存在有来自其他放射性同位素踪迹的衰变热。
Once the reactor has shut down, there remains "decay heat" from traces of other radioactive isotopes.
在一个宇宙中，原子在第一个半衰期中衰变了，于是你有了一只前猫。
So in one universe, the atom decays within the first half-life, and you have an ex-cat. Or ex-qat.
氡很容易从地下释放到空气中并通过称为氡子核的短命衰变产物分解。
Radon escapes easily from the ground into the air, where it disintegrates through short-lived decay products called radon progeny.
这种超重元素通常是具有非常强的放射性，并且几乎立即会发生衰变。
Such superheavy elements are usually very radioactive and decay away almost instantly.
由于不同的同位素有不同的衰变速率，每种方法都不会拘泥于标准数值。
Because different isotopes decay at different rates, each method provided a slightly different measuring stick.
大多数被创造出来的新元素在衰变以前只能存在十亿分之一秒。
Most of the new elements that get created like this last billionths of a second before they disintegrate.
大多数被创造出来的新元素在衰变以前只能存在十亿分之一秒。
Most of the new elements that get created like this last billionths of a second before they disintegrate.
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