【摘 要】
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The acceleration of decay induced by frequency measurements, namely the quantum anti-Zeno effect (AZE), was first predicted by Kofman and Kurizki [Nature 405 (2
【机 构】
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School of Physics,Nanjing University,Nanjing 210093,China
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The acceleration of decay induced by frequency measurements, namely the quantum anti-Zeno effect (AZE), was first predicted by Kofman and Kurizki [Nature 405 (2000) 546 ]. The effect of the frequency measurements on nuclear β decay rate is analyzed based on the time-dependent perturbation theory. We present a detailed calculation of the decay rates of 3H, 60Co (β? type), 22Na, 106Ag (β+ type) and 18F, 57Co and 111Sn (EC type) under frequency measurements. It is found that the effects of frequency measurements on the decay rates ofβ+and β? cases are different from the case of EC, and the smaller the β decay energy is, the more favorable it is to observe the AZE in experiment. Based on our analysis, it is suggested that possible experimental candidates should have a small decay energy and a reasonable half life (such as 3H) for observing the AZE inβ decay.
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