Final answer:
The responsibility for use of radioactive materials on base by non Air Force organizations lies with the authorized user.
Step-by-step explanation:
The responsibility for use of radioactive materials on base by non Air Force organizations is with the Authorized user.
An authorized user is an individual who is responsible for the receipt, possession, use, and transfer of radioactive materials under a specific license or permit.
Examples of authorized users include medical practitioners, researchers, and industrial personnel.