In the experimental observation of nuclear fission, only four stable solid products—barium, krypton, cesium, and xenon—can be detected stably after the fission of uranium235, with no other large numbers of new solid particles. Based on this objective fact, the fission of uranium235 can be divided into three reaction paths: about 65% of fission only involves nuclear structure recombination without mass defect or energy release; 25% of fission occurs as two uranium235 nuclei paired to form cesium and xenon, which contributes almost all the total mass defect of nuclear fission; the remaining tiny difference can be attributed to experimental statistical error. Based on the Cosmic Cycle Unified Theory, this paper clarifies that matter is composed of elementary particles: the most basic physical units in the universe are protons, neutrons, and electrons; hydrogen, deuterium, and tritium are the primary basic atoms; and other heavy elements are formed by polymerization and evolution in stellar environments. This paper focuses on the microscopic energy release mechanism of nuclear fission without elaborate discussion of cosmic evolution. All the enormous energy and extreme high temperature released by nuclear fission come from gamma photons confined inside particles. Among them, gamma photons stored in electrons have a low energy level, with an intrinsic energy of about 510,000 electron volts and a smaller equivalent mass; protons and neutrons store ultrahighenergy gamma photons. Only such highenergy gamma photons possess sufficient energy level and energy density to produce the extreme high temperature of hundreds of millions of degrees in nuclear explosions, which ordinary rays and lowenergy photons cannot reach. The word "cage" in this paper is only a popular metaphor to intuitively understand the microscopic confinement effect. Based on experimental observation products, this paper completes the complete deduction of the energy release mechanism of nuclear fission, and the relevant theoretical values can be gradually calibrated and improved in subsequent experiments.
Jiaqing Yan (Wed,) studied this question.