if you are working with a radioactive source that emits alpha particles, how should you protect yourself
"Protecting yourself from external exposure to alpha radiation is easy, since alpha particles are unable to penetrate the outer dead layers of skin or clothing. However, tissue that is not protected by the outer layer of dead cells, such as eyes or open wounds, must be carefully protected.
The exposure pathways of concern are inhalation or ingestion of alpha emitters, which continue to emit alpha particles. Alpha emitting radionuclides taken into the body release alpha particles directly to sensitive living tissues. As their high energy transfers directly to tissue, it causes damage that may lead to cancer.
The most significant way people come in contact with alpha emitters is in their home"