Effect of local rotations on the optical response of : Application to ion-beam damageG. García, J. Olivares, F. Agulló-López, A. García-Navarro, F. Agulló-Rueda, A. García-Cabañes and M. CarrascosaEurophys. Lett., 76 6 (2006) 1123-1129DOI: https://doi.org/10.1209/epl/i2006-10375-2