Calculation of beta decay rate of 12Be

Beta decay is one of the usual decay modes in nuclides and wide varieties of nucleus emit this kind of radiation naturally or in the mode of unstability. In this paper along with study the structure of 12Be, 12B and 12C based on the Mean Field theory and by using Woods-Saxon Potential as most authentic potential, amplitude of wave functions are investigated. Based on these wave functions, mixed states by considering of spin and isospins of states in Mean-Field theory are obtained and then beta decay rate of 12Be by using Fermi and Gamow-Teller transitions are calculated and compared with available experimental data in literatures. This comparison shows desirable agreement between experimental data and theoretical results.