In each blank, try to type in the
word that is missing. If you've
typed in the correct word, the
blank will turn green.
If your not sure what answer should be entered, press the space bar and the next missing letter will be displayed. When you are all done, you should look back over all your answers and review the ones in red. These ones in red are the ones which you needed help on. Question: 5 ways x-rays with matter?Answer: scattering,
comptom effect,
photelectric effect,
pair production,
photodisintegration Question: 2 most important ways that x-rays with matter in producing x-rays are?Answer: effect,
photoelectric Question: higher energy x-rays result in _________ wave lengthsAnswer: Question: do x-rays have long or wavelengths?Answer: Question: moderate engery x-rays interact with _________Answer: Question: high energy x-rays interact with __________Answer: Question: two other names for scattering?Answer: scattering,
thompson scattering Question: type of scattering were is no change in energy but a change in directionAnswer: scattering
Question: type of scattering with no Answer: coherent Question: which direction is commonly seen in coherent ?Answer: forward Question: type of with ionization of the target atom, change in x-ray direction and reduction of energy?Answer: compton Question: how is x-ray absorbed in the compton effect?Answer: photoeletrically Question: what effect is it when are emitted from matter after the absorptionAnswer: photelectric Question: partial and scatteringAnswer: effect Question: form of radiation and as such can be dangerousAnswer: X-Rays Question: type of electromagnetic with wavelengthsAnswer: X-Rays Question: When radiation is only scattered by one localized scattering center, this is ?Answer: scattering Question: It is very common that scattering centers are grouped together, and in those cases the may scatter many times, which is known as? Answer: multiple Question: the decrease in energy (increase in wavelength) of an X-ray or gamma ray , when it interacts with matter?Answer: effect Question: The amount the wavelength by is called?Answer: shift Question: scattering where the photon gains energy (decreasing in ) upon interaction with matterAnswer: inverse comtpton Question: emitted can be referred to as Answer: photoelectrons Question: Two sources of ionizing radiation to which is exposed?
Answer: Natural environmental (background )
Man-made radiation Question: of natural environmental (background) radiation?
Answer: Cosmic radiation from the sun and stars
Radioactive elements in the (uranium, radium, thorium)
Radio-potassium and radiocarbon (found in foods, drinking water, and the air) Question: Man made sources?
Answer: Fallout from nuclear weapons testing and effluents from power plants
Radioactive materials used in industry
Medical and dental exposures Question: Answer: As Low As Achievable Question: The amount of radiation needed, when to the skin, to make it turn temporarily red?Answer: erythema Question: A unit of radiation measured by the amount of ionization in air. In non-bony biological tissue 1 roentgen delivers a dose approximately equal to 1 rad?Answer: Question: one ______ equal to the absorption of radiation energy per gram of matter. It has been replaced by the gray?Answer: Question: Roentgen equivalent man, a unit used in radiation protection to measure the amount of damage to human tissue from a dose of radiation?Answer: Question: A unit of that represents the amount of radioactivity associated with one gram of radium?Answer: Curie
Question: basis for the NCRP’s of policies and procedures for radiation exposuresAnswer: Question: workers are limited by a maximum of Effective Dose Equivalent of?Answer: 5 rem per Question: General public is a dose limit of?Answer: .5 rem per Question: Anyone less than 18 old should receive no more than?Answer: 0.1 rem -body dose in 1 year Question: woman should not receive no more than?Answer: .5 rem per Question: SOURCES OF EXPOSURE
Two sources of medical radiation are?
X-rays (external source)
Radionuclides (internal source)
Answer: X-rays (external )
Radionuclides (internal source)
Question: Ways in mutations can manifest themselves are?
Answer: Miscarriages
Physical defects
Metabolic or biologic changes causing a predisposition to disease or premature death Question: Dose is in?Answer: grays (Gy) or (Sv) Question: REM ?Answer: radiation Question: radiation absorption is by?Answer: RAD, radiation dose
Question: 100 RAD = how many Gy?Answer: Question: what is the unit of activity?Answer: Question: What does EDE for?Answer: effective dose Question: there is no energy at a deflection of how many degrees?Answer: zero Question: which has a frequency, hard or soft x-rays?Answer: hard Question: has a shorter wavelength hard x-rays or soft x-rays?Answer: Question: what is it called when electrons are emitted from matter after the absorption of energy from electromagnetic ?Answer: Question: what effect is it when electrons are emitted from matter after the absorption of energy from electromagnetic ?Answer: hertz Question: the theory of an elecctromagnetic wave scattered by particles?Answer: scattering Question: the wavelength of the incident x-ray is _________ the wavelength of the scattered x-ray?Answer: equal Question: most coherently x-rays are scattered in what direction?Answer: forward Question: decrease in energy (increase in ) of a x-ray or gamma ray photon when it interacts with matter is called?Answer: scattering Question: in this type of scattering the photon gains energy (wavelength gets shorter) as it interacts with ?Answer: compton scattering Question: amount a changes is know as?Answer: shift Question: what type of is it if a photon has low energy but still has sufficient enough energy to eject an electron from its host atom?Answer: photoelectric Question: when higher energy photons bombard the nucleus and cause an electron and positron to be formed it is ?Answer: pair |
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