Flashcards in Fundamentals of X rays-UR Deck (23)
what are the three subatomic building blocks of an atom?
electrons, protons, and neutrons
which subatomic building block orbits the nucleus?
what are the two subatomic parts of a nucleus?
protons and neutrons
What term describe atoms with the same atomic number but different atomic masses?
what is the letter designation for the first orbital shell around the nucleus?
what is an element?
a collection of atoms that have the same chemical properties
how is electromagnetic radiation measured?
with frequency and wavelength
what characteristic enables X rays to penetrate materials?
What electromagnetic radiation has the same biological and photographic effect as X rays?
what natural property does spontaneous atomic disintegration describe?
what happens when fast moving electrons change speed or direction abruptly?
energy in the form of X rays is produced
what determines the energy of an X-ray photon?
the degree of deceleration by the electron
what type of radiation contains one or more sharp peaks within a continuous spectrum?
What area of the tube head is positive?
What area of a tube head is negative?
how are electrons emitted in a tube head?
by heating a filament to a high temperature
why is there a target in a tube head?
an electron beam has to strike a target before x rays are actually produced
what material is generally used in the construction of a target?
Why is a small focal spot desired?
the smaller the focal spot- the better the detail of the x ray image
what causes electrons to be accelerated to the target?
by which process do x rays give up all their energy to an orbital electron?
photoelectric effect (true absorption)
which x-ray matter interaction results in both a displaced electron and a deflected x-ray photon?