Homework 2 Flashcards
What is scattering?
Scattering refers to the process by which particles (such as photons, electrons, or atoms) are deflected from their original path when they encounter an obstacle, such as other particles, surfaces, or even fields. The direction of the particle changes, and in many cases, the energy of the particle may also change depending on the type of scattering.
What is Compton Scattering
Photon hits electron and is deflected with lower energy.
Occurs when X-ray or gamma-ray photons are deflected by electrons, losing some of their energy.
This is significant in industrial X-ray imaging, as scattered radiation can reduce the quality of the image.
What is Rayleigh Scattering
Photons interacts with particles (such as molecules of nitrogen in the air) and are scattered but do not lose any energy.
Rayleigh scattering is a type of elastic scattering where light or other electromagnetic radiation is scattered by particles that are much smaller than the wavelength of the radiation. This process occurs without a change in the wavelength (or energy) of the radiation, which is why it is classified as elastic scattering.
What is backscatter radiation?
Backscattering in radiography refers to the phenomenon where some of the radiation (typically X-rays or gamma rays) is deflected or scattered back toward the radiation source after interacting with the material being examined.
Backscatter radiation can degrade the quality of the radiograph by introducing unwanted noise or fog on the image.
What is backscatter radiation?
Backscattering in radiography refers to the phenomenon where some of the radiation (typically X-rays or gamma rays) is deflected or scattered back toward the radiation source after interacting with the material being examined.
Backscatter radiation can degrade the quality of the radiograph by introducing unwanted noise or fog on the image.
Which of the following is true with regards to ‘back scattering’?
It is a phenomenon that occurs when radiation interacts with materials.
It is one form of scattered radiation that is deflected from the adjacent object(s) such as the ground, wall or structure and returning to the film under test.
It is less penetrating than the primary radiation.
The process where photons are deflected by the outer electrons but do not change in energy or release any electrons is referred to as:
Rayleigh scattering
The process where photons are deflected by the outer electrons but do not change in energy or release any electrons is referred to as:
Rayleigh scattering
An interaction between a photon and an orbiting electron causing an electron to be ejected and where all that photons energy is used to do so is called:
Photoelectric effect
A process where a photon interacts with a free outer electron causing the electron to be ejected with only part of the photon’s energy being transferred to it is called:
Compton scattering
A process where high energy photon (> 1.02MeV) collides with the nucleus in an atom and the photon energy is absorbed producing an electron and a positron is called
Pair production
A process where electrons are slowed down by the field of force around the nucleus which results in the emission of X-radiation is called
Bremsstrahlung (braking radiation)
In accordance with BS5650, which of the following is classified as a Category II type container for radioactive isotopes?
Projection type
During the generation of X-radiation, the area within the target which is struck by the electrons is called the
Focal spot
It is the specific area on the anode (target) in an X-ray tube where the high-speed electrons from the cathode collide, resulting in the production of X-rays.
In the electrical circuit used in X-ray tube, what is a Graetz Circuit?
It is voltage reversing circuit.
A Graetz circuit, also known as a bridge rectifier, is an electrical circuit used to convert alternating current (AC) to direct current (DC). In the context of an X-ray tube, the Graetz circuit is employed in the power supply to provide a consistent and stable high-voltage DC needed for the operation of the tube.
