Estimation of the double alpha-decay half-life
V. Yu. Denisov
Abstract
The model for the description of the simultaneous emission of two α-particles from the opposite sides of the nucleus (the double α-decay) is discussed in detail. The 32 smallest values of the half-lives of the double α-decay of nuclei are calculated. The daughter nuclei formed after the double α-decay are even-even and spherical in the ground state in the model. It is shown that the half-lives of the double α-decay are much smaller than the emission of 8Be cluster with sequential decay of 8Be into two α-particles. The calculated values of the double α-decay half-lives show that measuring this decay is possible in the accelerator experiments by forming the proton-rich nuclei. A detailed comparison of the characteristics of the single and double α-decays as well as the emission of 8Be cluster is presented.