good reference for lecture-1

http://www.epa.gov/rpdweb00/docs/402-k-10-008.pdf

Lecture-1

                                Radiation Sources

        What is the definition of Radiation Protection?

  —Radiation protection may be defined simply as effective measures employed by radiation workers to safeguard patients, personal, and the general public from unnecessary exposure to ionizing radiation.

  —Example of ionizing radiation:

         X ray, γ ray

           Objectives

               By the end of this lecture you have learnt:

    ØSource of radiation

                 Natural (background) source

                 Manmade(Artificial) source

   ØBiological damage potential of radiation

                 Meaning of biological effect

                Radiation interaction with atom

                Type of biological effect

           Source of radiation 

                Human beings are continuously exposed to source of ionizing radiation.

                Source of ionizing radiation may be:

                 I.Natural (background) source

                 II.Manmade(Artificial) source