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We present a basis selection method for truncated shell-model calculations. In this method, the correlated basis is constructed with the eigenvectors of the Hamiltonian that is diagonalized in each partition of the shell model. A truncation scheme is established by naturally taking the low-lying correlated-basis vectors in different partitions, which is equivalent to the j j -coupling scheme of the shell model when all the correlated-basis vectors are considered. The results are compared with standard shell-model calculations. The convergence properties of the correlated-basis method are discussed. [ABSTRACT FROM AUTHOR]

The author discusses a basis selection method for the truncated shell-model calculations. Topics discussed include construction of correlated basis with eigenvectors of the Hamiltonian, establishment of truncation scheme by taking the low-lying correlated-basis vectors, and analysis of the convergence of wave functions. It adds that the correlated-basis scheme is equivalent to J J-coupling scheme.