Card Set Information
On the periodic table, gold is
197 . Which is the
A #, which is the Z #?
197 is the A#. which is the mass #, it includes all protons and neutrons.
79 is the Z#. which is the Atomic #, it is the number of protons in the nucleus.
Using gold again with a Z# of 79, and an A# of 197, how many neutrons are in the gold nucleus?
118. The A# is the total protons and neutrons. The Z# is protons only. Subtract Z from A to get # of neutrons.
Equivalent dose, ( EqD ) and Effective dose ( EfD ) are measured in what? Name the SI and Traditional units.
Traditional unit is Rem's.
Si unit's are Sieverts (Sv)
How many millisieverts makes 1 Sievert?
1,000. and a millisievert is 1/1000 of a Sievert.
List the 3 radiation measuring units of the SI system.
Gray (absorbed dose)
Sievert (EfD and EqD)
List the traditional units of radiation measurement.
Rad (absorbed dose)
Rem (EfD and EqD)
All Ionizing Radiation has weighting factors. (W
) X-rays and Gamma rays have a weighting factor of ___?
Alpha particles have a weighting factor of ___?
X-rays and Gamma rays are 1.
Alpha particles are 20.
See table 3-2
True or False. The higher the weighting factor of an ionizing radiation, the more chance it has of ionizing tissue.
True or False. When a particle is emitted from the nucleus, an electromagnetic radiation occurs in the form of a gamma photon.
The most important purpose of added filtration is____?
Reduce Patient Dose
In diagnostic x-ray, the higher the energy of the photon, the more chance of a compton interaction. What interaction on matter would low energy photons mostly have?
Photoelectric effect. (low energy photons are most likely to be absorbed)
What interaction usually happens when an x-ray photon interacts with an outer shell electron.
The Z # is the amount of ______ which uniquely identifies each element.
During beta emission an atom releases an__________?
Alpha particles are made of 2 protons and 2 neutrons. Which is better known as a ________?
Helium ion. (He)
Which dose measurement takes into consideration the biological damage caused by radiation.
1) Maximum permissible dose
2) Absorbed dose
3) Background Equivalent dose
True or False. A compton scattered electron will be absorbed close to the site of interaction.
A positron has the same mass as an _____?
100 ergs per gram is equivalent to how many Rad's.
LET is Linear Energy Transfer, it is expressed in units of _________?
In the 1950's what replaced Tolerance dose for radiation protection purposes
Maximum permissible dose (MPD)
The creation of 2 photons of .51 mEv each is the result of _____?
True or False. X-rays are low LET.
True. X-rays are LOW LET !!!
Curies are a large measurement and Becquerels are a small measurement.
What do they measure and how many Becquerels are in 1 Curie?
Look it up. :)
Kerma, probably should study that.