Abstract
The density of states of the nucleus 64Cu has been calculated in a 1f2p configuration space and broken down according to the contributions of 1f7/2 zero- and one-hole components. This is achieved without a shell-model diagonalisation and thus it represents a convenient and simple procedure for evaluating a priori the truncation of a shell-model configuration space. The results of an m-scheme calculation and a jj-scheme calculation are compared.