The possibility to produce superheavy elements in the course of low-yield nuclear explosions is analyzed within a simple kinetic model which includes neutron capture, gamma-emission, fission and ...particle evaporation from excited nuclei. We have calculated average numbers of absorbed neutrons as well as mass distributions of U and Cm nuclei exposed to an impulsive neutron flux, as functions of its duration. It is demonstrated that detectable amounts of heavy nuclei absorbing from 20 to 60 neutrons may be produced in this process. According to an optimistic scenario, after multiple beta-decay such nuclei may reach the long-living elements of the predicted ``island of stability''.
It is well known from numerous experiments that nuclear multifragmentation is a dominating mechanism for production of intermediate-mass fragments in nucleus-nucleus collisions at energies above 100 ...A MeV. In this paper we investigate the validity and performance of the Fermi break-up model and the statistical multifragmentation model implemented as parts of the Geant4 toolkit. We study the impact of violent nuclear disintegration reactions on the depth-dose profiles and yields of secondary fragments for beams of light and medium-weight nuclei propagating in extended media. Implications for ion-beam cancer therapy and shielding from cosmic radiation are discussed.
Phys.Rev.C52:R1760-R1763,1995 In two different phase transition models of nuclear fragmentation we show
that the emission of pre-equilibrium particles and mixing of events from
different classes ...cannot be ignored in the analysis of nuclear fragmentation
data in terms of critical exponents, and we show how the apparent values of the
extracted exponents are affected.
In two different phase transition models of nuclear fragmentation we show that the emission of pre-equilibrium particles and mixing of events from different classes cannot be ignored in the analysis ...of nuclear fragmentation data in terms of critical exponents, and we show how the apparent values of the extracted exponents are affected.
