Трёхмерное динамическое моделирование деления возбуждённых атомных ядер: условие разрыва

In the longstanding theoretical investigations of the excited nuclei fission process, the question of the nucleus scission condition influence on calculated values of the physical observables remained in the shadow. We have developed a model for the investigation of this question concerning the following quantities: average value of the pre-scission neutron multiplicity distribution; average value of the fission fragments kinetic energy distribution; variance of the fission fragments mass distribution; variance of the fission fragments kinetic energy distribution. During the modeling it was assumed that the excited nucleus might separate and/or evaporate a light particle. In the computer code which implements the dynamical model, three collective coordinates describing time evolution of the nuclear shape are accounted for. It was found that the scission condition strongly influences the variances of kinetic energy and mass distributions whereas two other observables are sensitive to the variation of this condition significantly weaker. Possible influence of the detected effect on agreement between results of modeling and experimental data are discussed.