Cookies Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

A Note on Radioactive Materials and their Measurements

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this chapter

+ Tax (if applicable)

Chapter Summary

Elements are placed in the periodic table of elements according to atomic number or proton number often referred to as Z. Their atomic weights are also usually indicated and can be fractional if the element in nature contains more than one isotope. Isotopes of an element all have the same atomic number, Z, but have different numbers of neutrons. Some of these isotopes, even in naturally occurring elements, may be radioactive, and are usually given the atomic weight of the longest known isotope. Radioactive decay occurs when an unstable atom loses energy by emitting particles and gamma radiation or by spontaneously fissioning. The activity of a radioactive sample is simply the rate of radioactive decay, expressed as the number of decays per unit time.

Keywords: gamma radiation; isotopes; periodic table; radioactive decay



Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
    The Oceans in the Nuclear Age — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation