Alpha-induced reactions on 154Sm,233,235,236,238U,and 237Np deformed nuclei are studied theoretically.The effects of hexadecapole deformation,deformed surface diffuseness parameter,and orientation on barrier height and position,fusion cross-section at any angle,and fusion cross-section have been investigated.Both hexadecapole deformation and deformed surface diffuseness can affect barrier characteristics and enhance fusion cross-section.Good agreement between experimental data and theoretical calculations with quadrupole and hexadecapole deformation and deformed surface diffuseness were observed for the 4He+154Sm,235U,237Np reactions.