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.
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.
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.
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.
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.
地质学家在石笋上钻孔，使用铀衰变成钍的同位素的方法确定它们的年龄。
In this case the geologists drilled into the stalagmites and estimated their age from the way that uranium decays into an isotope of thorium.
有些核裂变产生的副产品自身具有放射性。这些物质的衰变，也在产生热能。
Some byproducts of the nuclear fission are themselves radioactive.These decay, producing heat.
他们的发现使这种衰变速率的反常变化是由太阳中微子造成的论点得到了加强。
Their findings strengthened the argument that the strange swings in decay rates were caused by neutrinos from the sun.
在海洋的大部分区域，海床都由厚重的粘土构成，最适合吸收放射性衰变产物。
Inlarge parts of the ocean, the seafloor is made of thick, heavy clay, perfectfor absorbing radioactive decay products.
量子隧穿发生在许多的物理过程中，比如说放射性衰变和太阳上发生的核聚变。
Quantum tunneling is involved in many physical processes, such as radioactive decay and the nuclear fusion that takes place in the Sun.
这个模型的核心是延伸型指数函数的松弛效应，就像放射性物质的衰变曲线一样。
The core of this model is a function called a stretched exponential relaxation, which is similar to the decay curve of a radioactive material.
原子通过辐射由不稳定状态转变为更加稳定状态的过程称为放射性衰变或放射性。
The process by which an atom changes from an unstable state to a more stable state by emitting radiation is called radioactive decay or radioactivity.
更妙的是，显然人们可以用放射性作为时钟，用衰变系列的半衰期计算出岩石的年龄。
Better still, it became apparent to him that one could use radioactivity as a clock, with the half-life of a decay series enabling us to calculate the age of a rock.
应用推荐