Help
Options
Question
What are the 5 ways a photon can interact?
click to flip
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't know
Question
What are other names for Classical Scattering?
Remaining cards (41)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Physics
| Question | Answer |
|---|---|
| What are the 5 ways a photon can interact? | Classical Scattering, Compton Effect, Photoelectric Effect, Pair Production & Photo Disintegration |
| What are other names for Classical Scattering? | Coherent Scattering, Thompson Scattering & unmodified Scattering |
| What is the name of the interaction that occurs when a incident photon strikes an outer shell electron of a target atom (aka atom of the body)? | Classical Scattering |
| What happens to the photon in Classical Scattering? | Photon changes direction slightly but it does not lose energy and the atom is not ionized |
| What energy are the photons in Classical Scattering? | Low energy-10kv or lower |
| How are the photons scattered in Classical Scattering? | in a forward direction, not more than 20 degrees from original |
| How does classical scattering affect the image? | Relatively unimportant bc their energy is too low. |
| What interactions are responsible for Scatter? | Classical & Compton effect |
| What interactions are responsible for Secondary Radiation? | Photoelectric Effect,Pair Production & Photodisintergration |
| What kind of interaction is Classical Scattering? | Photon interaction between a photon and a outer shell electron |
| When talking about a photon interaction what is the meaning of target atom? | Atom of a type of element in the body; part of a tissue |
| What happens to the electron when it is struck by a photon in Classical Scattering? | The electron begins to vibrate |
| At what frequency does the electron vibrate when struck by a photon in Classical Scattering? | Same frequency as the photon |
| What happens when an electron vibrates? | Electromagnetic radiation is produced |
| HOw much energy does the photon that leaves the atom have? | Same energy as the incident photon |
| What happens to the majority of Classical Scattered photons? | They are absorbed before they penetrate through the tissue |
| When using LOW exposure conditions what can Classical Scattering contribute to? | Fog & Loss of detail |
| What is another name for Compton Scattering? | Compton Effect or Modified Scatter |
| What happens in the process of Compton Scattering? | Incident Photon strikes an outer shell electron with enough energy to knock it out of orbit |
| What is the result of Compton Scattering? | Photon loses energy and changes direction while ionizing a target atom |
| At what diagnostic range does Compton Scattering occur? | 25-125 Kev |
| How are the photons scattered in Compton Scattering? | at any angles up to 180 degrees |
| What do you call photons scattered 180 degrees? | Backscatter |
| How much energy does the photon transfer to the electron in Compton Scattering? | at least the amount equal to it's binding energy |
| If an interaction is between an incident electron and an atom what kind of interaction is it? | Production |
| If an interation is between a incident photon and a electron what kind of interaction is it? | Interaction with matter |
| What happens to Compton interactions as photon energy increases? | Decrease(higher kv=more transmission) |
| What is the relationship between the deflection of the photon and the energy it loses in Compton Scattering? | The greater the angle the more energy lost |
| In what type of tissue are Compton Interactions likely to occur? | They occur in all types |
| What interaction is the least desirable? | Compton effect |
| Why do we want to prevent the Compton Effect? | Doesn't contribute anything useful to our image, it produces fog & it is where the technologist gets most of their x-ray exposure |
| What is the photoelecric Effect? | Photon absorption interaction |
| What does the photoelectric effect occur between? | incident photons & innershell electrons of the target atom (atoms of tissue) |
| What happens to the photon in the Photelectric effect? | it tansferes all of it's energy to the electron and ceases to exist |
| What is the name of the electron that is ionized during the Photoelectric Effect? | Photoelectron |
| What is an ion pair in Photoelectric effect? | ionized atom & electron |
| What are the 2 kinds of secondary radiation in Photoelectric interactions? | Photoelectron & Characteristic Photon |
| What type of secondary radiation occurs when a low energy electron is released that can only travel through 1mm of tissue? | Photoelectron |
| What two interactions are of improtance in making an x-ray image? | Compton Effect & Photoelectric Effect |
| What is the name of the ejected electron a Compton Effect interaction? | Compton electron or Secondary electron |
| How do you figure the energy of the Compton scattered x-ray? | The difference between the energy of the incident x-ray and the energy of the ejected x-ray |
| How do you figure the energy of the ejected electron in Compton Scattering? | It's binding energy plus the kinetic energy with which it leaves the atom |
Created by:
Sukioshii