rate of decay 1.At a given frequency, the rate at which the sound level in a room decreases after a source stops emitting sound; expressed in decibels per second (dB/s). 2.Of sound waves in an enclosed space, the rate at which the sound-pressure level ofreverberationdecreases; usually ...
Natural radioactivity provides tracers in a wide range of characteristic timescales and reactivities, which can be used as tools to study the rate of reaction and transport processes in the ocean. Apart from cosmogenic nuclides and the long-lived radioisotope K-40, the natural radioactivity in the...
[U](社会、机构、制度等的)衰败,衰退the gradual destruction of a society, an institution, a system, etc. v.(动词) vt. & vi. (使)腐烂,(使)腐朽make or become bad vi. 衰败,衰退,衰落fall to a lower or worse state;decline decay是什么意思 ...
radioactive decay rate The time rate of the disintegration of radioactive material generally accompanied by the emission of particles and/or gamma radiation. Dictionary of Military and Associated Terms. US Department of Defense 2005. Want to thank TFD for its existence?Tell a friend about us, add...
中文词源 decay 腐烂 de-, 向下。-cay, 同-cad, 掉落,词源同case, accident. 引申义腐烂。 词组短语 1、urbandecay衰败城市城市衰败 2、actinouraniumdecayseries [化] 锕铀衰变系 3、alphadecay[化] α衰变 [医] α[质点]衰变 4、alpha-decay[医] α蜕变 ...
What is the rate of radioactive decay? What is the decay constant? How fast does americium-241 decay? What can change the rate of radioactive decay? What is decay rate in nuclear physics? How does uranium-235 decay? What changes the rate of radioactive decay? What is radioactive decay?
Uranium 238 decay chain comprises alpha and beta decays. Anuclear reactoroccurs especially the β− decay because the common feature of thefission productsis an excess of neutrons (seeNuclear Stability). An unstable fission fragment with excessneutronsundergoes β− decay, whe...
Decay Rate Comparison Main Concept The decay rate of a radioactive substance is characterized by its half-life ( ), a quantity that represents the time taken for a given amount of material to decay into half of its initial value. The amount of radioactiv
(Nuclear Physics) disintegration of a nucleus that occurs spontaneously or as a result of electron capture. One or more different nuclei are formed and usually particles and gamma rays are emitted. Sometimes shortened to:decayAlso called:disintegration ...