Quantum Anti-Zeno Effect in Nuclear β Decay

• 作者: Ming Ji Chang Xu
• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: NUCLEAR PHYSICS
• 页码范围: 33-38
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/0256-307X/38/3/032301

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 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.