IHP Chapter 3

2. what to divide the A number by to find out which series an nuclide belongs to
5. a source of C0-60, Mn-59 and Fe-59 encountered during reactor maintenance
6. cosmic radiation after spallation, mainly neutrons, electrons and pions
8. annual average dose to the public from this group of sources is 314 mrem
10. the portion of cosmic radiation from the sun and outer space, made up of positively charged ions
11. these account for the majority of dose during reactor operations
13. the average person gets 13 mrem dose per year from these
14. most common medical diagnostic use of radiation
15. a method to temporarily implant a small radiation source into a patient
17. the decays series that begins with Np-237
18. average annual occupational dose to NNPP workers
20. the decay series that begins with U-235

1. humans contain about 100 nCi of this primordial radionuclide
3. the end product of the three natural decay chains is a stable form of this element
4. the decay series that begins with Th-232
6. this process creates neutrons and pions at the top of Earth's atmosphere by physically knocking them out of atmospheric atoms
7. A radionuclide such as Tc-99m that IS used for medical purposes (taken internally)
9. the decay series that begins with U-238
12. annual average dose to the public from this group of sources is 311 mrem
13. radionuclides created when cosmic neutrons and protons interact with atoms in the atmosphere
16. this gas is the primary health concern from naturally occurring radioactivity
19. one very light cosmogenic nuclide