In this review we will present the results of recent \(\beta \)-decay studies using the total absorption technique that cover topics of interest for applications, nuclear structure and astrophysics. The decays studied were selected primarily because they have a large impact on the prediction of (a) the decay heat in reactors, important for the safety of present and future reactors and (b) the reactor electron anti-neutrino spectrum, of interest for particle/nuclear physics and reactor monitoring. For these studies the total absorption technique was chosen, since it is the only method that allows one to obtain \(\beta \)-decay probabilities free from a systematic error called the Pandemonium effect. The total absorption technique is based on the detection of the \(\gamma \) cascades that follow the initial \(\beta \) decay. For this reason the technique requires the use of calorimeters with very high \(\gamma \) detection efficiency. The measurements presented and discussed here were performed mainly at the IGISOL facility of the University of Jyväskylä (Finland) using isotopically pure beams provided by the JYFLTRAP Penning trap. Examples are presented to show that the results of our measurements on selected nuclei have had a large impact on predictions of both the decay heat and the anti-neutrino spectrum from reactors. Some of the cases involve \(\beta \)-delayed neutron emission thus one can study the competition between \(\gamma \)- and neutron-emission from states above the neutron separation energy. The \(\gamma \)-to-neutron emission ratios can be used to constrain neutron capture (n,\(\gamma \)) cross sections for unstable nuclei of interest in astrophysics. The information obtained from the measurements can also be used to test nuclear model predictions of half-lives and Pn values for decays of interest in astrophysical network calculations. These comparisons also provide insights into aspects of nuclear structure in particular regions of the nuclear chart.

在这篇综述中，我们将介绍使用总吸收技术进行的\（\ beta \）衰变研究的最新结果，该研究涵盖了应用，核结构和天体物理学感兴趣的主题。选择研究的衰变主要是因为它们对以下方面的预测有很大影响：（a）反应堆中的衰变热，这对于当前和未来反应堆的安全性很重要，以及（b）粒子感兴趣的反应堆电子反中微子光谱/核物理和反应堆监控。对于这些研究，选择了总吸收技术，因为它是唯一一种使人获得\（\ beta \）衰减概率而没有称为Pandemonium效应的系统误差的唯一方法。总吸收技术是基于对遵循初始\（\ beta \）衰减的\（\ gamma \）级联。由于这个原因，技术需要具有非常高的利用热量计的\（\伽马\）检测效率。这里介绍和讨论的测量结果主要是在于韦斯屈莱大学（芬兰）的IGISOL设施中使用JYFLTRAP Penning阱提供的同位素纯束进行的。实例表明，我们对选定核子的测量结果对反应堆的衰变热和反中微子谱的预测都产生了很大的影响。有些情况涉及\（\ beta \）延迟中子发射，因此可以研究\（\ gamma \）之间的竞争-和来自中子分离能以上状态的中子发射。的\（\伽马\） -to-中子发射比可用于约束中子俘获（N，\（\伽马\） ），用于在天体物理学的兴趣不稳定的原子核的横截面。从测量获得的信息还可用于测试天体物理网络计算中感兴趣衰变的半衰期和Pn值的核模型预测。这些比较还提供了对核图特定区域的核结构方面的见识。