衰变辐射也能释放部分热量，这种热量被称为衰变热。
The decay radiation then deposits most of its energy in the fuel, and this is what is referred to as decay heat.
这些物质被称作“放射性同位素”—同一种元素的变种，他们具有异常的中子数量，频繁的衰变和放出辐射。
These materials are known as "radioisotopes" -versions of an element that, because they have an abnormal number of neutrons, frequently decay and release radiation.
目前情况下值得忧虑的是电离辐射，它由重同位素——如碘131和铯137——自发衰变而生成。
Of concern in the current situation is ionizing radiation, which is produced by spontaneously decaying heavy isotopes, such as iodine 131 and cesium 137.
我们是在事故发生数年之后才了解到当时核燃料融化的情况，因为那个时候反应炉的辐射才衰变至足以安全开炉的程度，这一点很重要。
It is significant that we did not learn the degree of melting until several years later, when the reactor vessel’s radioactivity had decayed sufficiently to open it.
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.
详细计算了光电子与衰变光子辐射方向之间的角度关系的显式表示。
The explicit expression for the angular relation between the direction of photoelectron and decay radiation is calculated in detail.
由于连续衰变的结果，放射性物质的数量，辐射发射率都逐渐下降。
Because of the continuous decay, the quantity of radioactive material and the rate of emission of radiation decrease steadily.
氡是来自岩石中镭辐射衰变而产生的气体。
Radon is a gas that comes from the radioactive decay of radium in rocks.
在测定其荧光寿命及荧光量子产率基础上计算出它们的辐射及非辐射衰变速度常数。
On the base of fluorescence quantum yield and lifetime measurement, the rate constants of radiation decay and non radiation decay of this compound were calculated.
强子具有椭球对称性，本文预示介子的电磁辐射衰变中将存在体积和形变效应。
The hadron is of ellipsoidal symmetry and it is predicated that there will exist the Volume and deformation effects during the process of electromagnetic radiation decay of mesons.
氡是来自岩石中镭辐射衰变而产生的一种气体。
Radon is a gas that comes from the radioactive decay of radium in rocks.
这些辐射的原子衰变得非常快。
原子激发态是不稳定的，其必然会自发地向低能级衰变，产生自发辐射现象。
Atom's motivated state in not stable, it inevitably disintegrate into the lower energy state, which makes the phenomenon of the spontaneous radiation.
到那时候所有的恒星都会烧尽，而在其中的质子和中子可能会衰变成轻粒子和辐射。
By then all the stars will have burned out and the protons and neutrons in them will probably have decayed into light particles and radiation.
针对耦合空间中的声能衰变，提出一种改进的声辐射度模拟方法。
An improved model based on acoustical radiosity was proposed to investigate sound decays in a system of two coupled Spaces.
针对耦合空间中的声能衰变，提出一种改进的声辐射度模拟方法。
An improved model based on acoustical radiosity was proposed to investigate sound decays in a system of two coupled Spaces.
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