Term
125I, Photons
3H (tritium), 32P, electrons, particles |
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Definition
| The major gamma emitter used on campus is _____ and emits ______, which are wavelength in nature. The Beta emitters commonly used on campus are: ______, ____, 35S and 14C. These emit positrons or ___________ from the nucleus that act as ___________. For further information on Radiation, here is a very useful EPA website http://www.epa.gov/radiation/understand/radiation.html(6/6 points) |
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Term
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Definition
| Which travels farther an electron or a photon? Which would travel farther, radioactive emissions from 32P or I125?(1/1 points) |
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Term
Ci = amount, quantity
eV = energy emitted
R = Roentgens = exposure in air
Rem = Roentgen equivalent
Rad - Roentgen absorbed dose |
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Definition
| Match the term with the unit: amount or quantity, dose, energy emitted, exposure (in air or gas) Ci = eV = R = REM= Rad =(5/5 points) |
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Term
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Definition
| An effect of radiation that harms a fetus is called:(1/1 points) |
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Term
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Definition
| The amount of time for half of the atoms in a radioactive material to decay is called its ________.(1/1 points) |
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Term
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Definition
| If 32P has a half life of 14 days and 35S has a half life close to 90 days, which one decays faster?(1/1 points) |
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Term
| time, distance, shielding |
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Definition
| The three principles used to protect yourself against EXTERNAL radiation exposure are.(3/3 points) |
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Term
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Definition
| If you increase your distance from a radioactive source by a factor of 4 how much do you decrease your dose?(1/1 points) |
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Term
| plexiglas, lead, lead bricks |
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Definition
| When choosing the correct shielding for an isotope, you would use ____________ for the high energy beta emitter P32, and use _______ shielding for the low energy gamma emitter 125I. For high energy gamma emitters, (such as cobalt-60 or cesium-137), use ______ _______.(3/3 points) |
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Term
| correct answer Bremsstrahlung are x-rays produced when beta particles or other electrons decelerate while passing near the nuclei of atoms. Shielding 32P beta rays with lead generates extra bremsstrahlung. with plexiglas the rate of deceleration of the electron is slower, and the radiation given off has longer wavelength and is less penetrating. |
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Definition
| Why is it so important to use the correct shielding with P32?(1/1 points) |
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Term
| correct answer 3H, 14C, 35S |
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Definition
| For the low energy beta emitters, ____, ____ and ____, no extra shielding is required as long as you are wearing appropriate PPE. However, in vitro protein labeling with 35S methionine or cysteine should be performed in a Biosafety cabinet or fume hood and activated charcoal should be used in the incubator to trap 35S-volatiles and reduce contamination.(3/3 points) |
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Term
| correct answer lab coat, gloves, eye protection, long pants, closed toed shoes |
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Definition
| When working with radioactive substances you are required to wear:(5/5 points) |
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Term
| correct answer absorbent paper |
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Definition
| When working with radioactivity you are required to cover working surfaces with_____________ .(1/1 points) |
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Term
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Definition
| In all labs where radiation is used,________ must be placed on doors, work areas, contaminated equipment, storage areas, and waste containers.(1/1 points) |
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Term
portable survey
battery, slowly
removable |
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Definition
| After each use of 14C, 32P, 35S and 125I, contamination surveys must be conducted using a ______ ______ meter. There are different types (geiger-mueller, sodium iodide crystal, ion chamber) that work best with different radioisotopes. To perform these surveys correctly, you must FIRST check the ________ when you turn it on, then sweep the meter ________ over work and storage areas, all equipment used, your gloves, lab coat, sleeves and if you had a spill, check your shoes! When working with 3H you can NOT use a meter and must check for __________ radioactivity using a liquid scintillation counter.(4/4 points) |
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Term
| correct answer warn others, protect them and keep them from spreading accidentally |
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Definition
| You MUST clean up any contamination when you are done working with radioisotopes. In the case of a spill, if you BRIEFLY leave the area why do you need to mark the area? Please give 2 reasons:(2/2 points) |
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Term
| lab manager or supervisor |
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Definition
| If an accident happens, you are required to notify your __ or _______. Choose all that apply.(1/1 points) |
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Term
| correct answer month, 3-6 months |
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Definition
| Swipe tests for removable contamination are performed and documented every ____, and EHS does a lab survey every __________.(2/2 points) |
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Term
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Definition
| Referring to the Radioactive Waste guidelines website http://www.ehs.uci.edu/programs/enviro/rwasteguidelines.html#labeling you must segregate radioisotopes by __ ___ and _ _____(2/2 points) |
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Term
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Definition
| It is permitted to dispose of radioactive materials in a sink or trashcan or to reduce the volume by evaporation to save money and time.(1/1 points) |
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Term
| eye protection, face shield |
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Definition
| UV is non-ionizing radiation. When visualizing DNA or RNA in Ethidium bromide gels with a UV light, in addition to gloves and a lab coat, you must wear ____ ________ and it is a good idea to wear a ____ shield.(Ungraded/2) |
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