Marina Barbui

1 Introduction Nuclear isomers have been widely studied due to their fascinating applications, including medical imaging (Habs et al., 2011; Pan et al., 2021), nuclear clocks (Peik et al., 2021), and nuclear batteries (Prelas et al., 2014). They still play a crucial role in various aspects of astrophysical nuclear reactions (Hayakawa et al., 2008; Zilges et al., 2022). In many nuclear reactions, the residual nuclei have isomeric states with narrow energy levels and relatively long half-lives.

1 Introduction Most of the energy released in the fission of actinide nuclei appears in the form of the total kinetic energy (TKE) of the fragments. Because of this fact, it is important to understand the TKE release for its practical importance and the information gained about large scale nuclear collective motions. There are many books that describe the fission process. Some general books are P. Talou and R. Vogt [1], W. Younes and W. Loveland [2], R.

Abstract Resonances in unstable quantum systems are radiating states that despite decaying overall normalization have a well-defined structure which is being balanced by outgoing radiation. Such an interplay between outgoing wave and internal quantum many-body dynamics leads to several unique effects.