Nucleosynthesis of Heavy Elements in Thermonuclear Explosions "Mike", "Par" and "Barbell"

The formation of transuranium nuclides in pulsed neutron fluxes of thermo-nuclear explosions is investigated in the kinetic model of the astrophysical r-process, taking into account time dependence of the external parameters and including the processes accompanying the beta-decay of neutron-rich nuclei. Time-dependent neutron fluxes in the interval similar to 10(-6) s were modeled within the developed adiabatic binary model. Probabilities of beta-delayed processes were calculated using the microsco-pic theory of finite Fermi systems. Calculations of the yields of transuranium nuclides Y(A) are made for three experimental USA thermonuclear explosions "Mike" (Y-M), "Par" (Y-P) and "Barbel" (Y-B). The standard (r.m.s.) deviations of calculations with the experimental data are 91% for Y-M, 33% for Y-P, 29% for Y-B, which is significantly lower than for other known calculations. The exponential approximation of the experimental dependences Y(A) is carried out and the values of r.m.s. are equal to 56%, 86.8% and 60.2% for Y-M, Y-P and Y-B, which is better or comparable with other calculations. An even-odd anomaly in the observed yields of heavy nuclei is explained by the influence of the beta-delayed processes in the heavy neutron-rich isotopes.