This chapter deals with gamma background radiation that is exposed to two
major natural sources: normal sources that are earthly gamma rays and astronomical rays. Earthbound gamma rays from radionuclide elements such as thorium,
potassium, and uranium. Also, in building and enhancing materials such as medical
plants, building purposes, some vegetables and fruits commonly used in markets
and soil. The measurements of gamma background radiation differ according to
the purpose. So, there are many instruments used such as HPGe detector, NaI (TI)
detector, CR-39, a dosimeter, and SSNDT detector. This research will explain in
detail the studies and the mechanism for each detector and how it works and the
application (practical) studies for each one. The purpose of calculating gamma
background radiation is to be in the safe side for human being according to the
international union specified with a standard limitation of world average value or
with a specific value ranged (standard values) according to the case study in medical, food, or building materials.
لبنى عبد الرسول مهدي | Lubna abdulrasool Mehdi | 3165