• Kev - 1,000 ev (see electron volt)
  • K-Electron Capture - Electron capture by a nucleus of an electron from the "K" or innermost shell of electrons surrounding it. Also loosely used to designate any orbital electron captured.
  • Kilovolt (kv) - Unit of electromotive force or potential equal to 100 volts.
  • Kilovolt Peak - The crest value of electromotive force or potential, in kilovolts, of a pulsating source of electric potential.
  • Klein-Nishina Formula - Gives an angular distribution of Compton scattered x-rays and gamma-rays.
  • K-Shell - The lowest energy state of an atom.