21. It includes the study of the production and use of radioactive sources for a range of processes. 22. In food " irradiation, " a radioactive source fries bacteria and microorganisms on meat and other foods. 23. A European Union study estimated that about 70 radioactive sources are lost every year from regulatory control. 24. Say you build a probe that heats only part of its exterior using an internal radioactive source . 25. "We'll be using actual radioactive sources so they can see the way the detection equipment responds ." 26. Consequently, a secondary and a field calibration is achieved with a portable jig carrying a small radioactive source . 27. Or has the radioactive source died? 28. Three years after the Sept . 11 attacks, federal authorities have made progress toward rounding up radioactive sources . 29. Modern density tools utilize a Cs-137 radioactive source to generate gamma rays which interact with the rock strata. 30. The radioactive source is in red, the shielding is blue / green, and the gamma rays are yellow.
