(g) An appellate court judge who is incapacitated prior to the completion of ten years of service as an appellate court judge shall receive during life for each full year of service one-tenth of the benefit such judge would have received had such judge completed ten years of service as an appellate court judge. For the purposes of this subsection, the term "incapacitated" or "incapacity" means physical or mental disability for further performance of duties and shall not mean the attainment of any certain age.