  In this paper we present the results of large-scale shell-model calculations
of muon-to-electron lepton-flavor violating transitions for the case of the
target nucleus 27Al. We extend the previous shell-model calculations, done in
the sd model space, by including also the p orbitals in order to see whether
the negative-parity states produce any significant effect in the conversion
rate. The analysis of the results shows the dominance of coherent transitions
mediated by isovector operators and going by the ground state of the target,
with practically null influence of excited positive- or negative-parity states.
