为了探测质子衰变放射性的假想形式,人们修建了巨大的探测器,但这些探测器从没发现这种东西。
Giant detectors built to look for a hypothetical form of radioactivity in which protons decay never found such a thing.
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.
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.
Alpha particles are these helium nuclei, and they are the result of radioactive decay.
阿尔法粒子是氦核,它们是放射性衰变的产物。
Suppose we've got some sort of radioactive atom, which has a certain chance of decaying.
假定我们有某种放射性原子,它们以一定的几率衰变
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