The observed half-life of Nd, 9.5±0.7 s, is shorter than theoretically predicted values. The half-lives of recently identified neutron-rich isotopes in the rare-earth region are compared with theoretical predictions, and a systematic behaviour is noted. (orig.)...
40 The half-life of a radioactive isotope is 693 s.Which of the following is the probability that a nucleus of the isotope will decay in the next second? A A 1/1000 B 1000 C 1000 In2 D 1/1000 In2 相关知识点: 试题来源:
有一个科学术语叫做半衰期(half life)。例如,铀238的半衰期约为45亿年,意思就是,每过45亿年,一个U-238原子核会有一半的概率衰变。有一个著名的射击游戏叫做《半条命》,其实这个游戏的英文名是half life,本意就是“半衰期”,所谓“半条命”实际上是望文生义的误译。为了帮助大家理解这个概念,美国韦尔斯利学院(...
Half-Life of the New IsotopeNa32; Observation ofNa33and Other New Isotopes Produced in the Reaction of High-Energy Protons on U With an improved on-line mass spectrometer we have discovered, by means of the reaction of 24-GeV protons on uranium, the very neutron-rich isotope 32... R.,...
half-life, measure of the average lifetime of a radioactive substance (see radioactivity) or an unstable subatomic particle. One half-life is the time required for one half of any given quantity of the substance to decay. For example, the half-life of a particular radioactive isotope of th...
The meaning of HALF-LIFE is the time required for half of something to undergo a process. How to use half-life in a sentence.
What is the half life of an isotope that decays to 25% of its original activity in 77.1 hours? What are protium, deuterium, and tritium? How do we know the half-life of carbon-14? Where is tritium found? What is the half-life of the carbon-14 used for radiocarbon dating?
1.A substance which undergoes exponential decay decays by the same ratio in equal intervals of time. The constant ratio is the half-life. The rate of radioactive decay of a substance is defined by its half-life. 2.The time in which half the atoms in a radioactive isotope decay. ...
Half-Life of the New Isotope 32Na; Observation of 33Na and Other New Isotopes Produced in the Reaction of High-Energy Protons on U Half-Life of the New Isotope 32Na; Observation of 33Na and Other New Isotopes Produced in the Reaction of High-Energy Protons on U... R Klapisch,C ...
The life-life ofBi210is5days. What time is taken by(7/8)thpart of the sample of decay ? View Solution The radioactive isotope32Pdecays by first order kinetics and has a half-life of 14.3 days. How long does it take for 95.0% of a given sample of 32 p to decay?