The decay radiation then deposits most of its energy in the fuel, and this is what is referred to as decay heat.

衰变辐射也能释放部分热量，这种热量被称为衰变热。

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The explicit expression for the angular relation between the direction of photoelectron and decay radiation is calculated in detail.

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。

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These materials are known as "radioisotopes" -versions of an element that, because they have an abnormal number of neutrons, frequently decay and release radiation.

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。

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But the slow decay in radiation intensity from a tabletop pulsar would make possible extremely long-range transmitters, giving far-off space probes an energy-efficient way to beam information back to earth.

ECONOMIST: Physics

Tritium would not be very dangerous just sitting in a tank somewhere -it would decay to very low levels of radiation in time.

FORBES: Uranium Stocks Looking Ugly Post-Fukushima As Short-Interest Rises

Radiation has to come from decay of radionuclides.

FORBES: TEPCO Releases Radiation Map