Exploration of possible anomalies in the decay of different radionuclides is an active research area in the fields of astrophysics and nuclear physics. The most significant changes in decay rates can be expected for ${\beta }^{-}$, ${\beta }^{+}$ or electron capture decay nuclides, due to the proposed influence of the solar neutrino flux by some research groups. In this work, the nuclear decay rate of ${\beta }^{+}$ decay of ${}^{22}\text{N}\text{a}$ was investigated during the time interval of $~$33 days. For this purpose, a coincidence system based on a planar high purity germanium detector and a plastic scintillation detector was designed and used for the acquisition of experimental ${}^{22}\text{N}\text{a}$ coincidence spectrum. The corresponding experimental conditions: temperature, atmospheric pressure, and relative humidity, which may affect the measurement system, were monitored. In addition, Monte-Carlo simulations of this system were performed in order to obtain the ${}^{22}\text{N}\text{a}$ simulated coincidence spectrum. The time-dependent coincidence spectra in 0.5 h bins were collected by the multiparameter MPA-3 system. The fluctuations in the decay rate (i.e. possible variations of the decay constant) were analyzed by Fourier and Lomb-Scargle algorithms. No significant evidence for periodic behavior in decay rate or aperiodic anomalies was found during the acquisition period.

探索不同放射性核素的衰变中的异常现象是天体物理学和核物理学领域的活跃研究领域。可以预期衰减速率最显着的变化是${\beta }^{-}$， ${\beta }^{+}$或由于某些研究小组提议的太阳中微子通量的影响而导致电子捕获衰变核素。在这项工作中，核衰变率${\beta }^{+}$ 的衰变 ${}^{22}\text{ñ}\text{一种}$ 在以下时间间隔内进行了调查 $〜$33天。为此，设计了基于平面高纯锗探测器和塑料闪烁探测器的重合系统，并将其用于实验的获取。${}^{22}\text{ñ}\text{一种}$重合谱。监视可能影响测量系统的相应实验条件：温度，大气压和相对湿度。此外，对该系统进行了蒙特卡洛仿真，以获取${}^{22}\text{ñ}\text{一种}$模拟重合谱。通过多参数MPA-3系统收集了0.5 h仓中随时间变化的符合光谱。衰减率的波动（即衰减常数的可能变化）通过Fourier和Lomb-Scargle算法进行了分析。在采集期间，未发现衰减率或非周期性异常的周期性行为的重要证据。