Quantum Anti-Zeno Effect in Nuclear Decay  

作　　者：Ming Ji Chang Xu 姬明;许昌(School of Physics,Nanjing University,Nanjing 210093,China)

机构地区：[1]School of Physics,Nanjing University,Nanjing 210093,China

出　　处：《Chinese Physics Letters》2021年第3期33-38,共6页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant Nos.11822503 and 11575082);the Fundamental Research Funds for the Central Universities(Nanjing University)。

摘　　要：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 ^(3)H,^(60)Co(β^(-)type),^(22)Na,^(106)Ag(β^(+) type) and ^(18)F,^(57)Co and ^(111)Sn(EC type)under frequency measurements.It is found that the effects of frequency measurements on the decay rates of β^(+)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 ^(3)H) for observing the AZE in β decay.

关 键 词：theory. experiment. DECAY 

分 类 号：O571.3[理学—粒子物理与原子核物理]