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36 Cards in this Set
- Front
- Back
2 types of RN production
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Reactor
Particle accelerator |
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Fission &Neutron activation are 2 types of ________ produced RN's.
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Reactor produced
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Linear accelerator and Cyclotron are two types of ___
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Particle accelerators
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Becquerel discovered Uranium -which is natural radioactivity.
Who discovered artificial radioactivity? |
Curie & Joliot
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Z# greater than ___ is naturally radioactive
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83
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How do you produced RN's?
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By bombarding stable nuclei wh subatomic particles, neutrons or both
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RN produced depends on what 3 things?
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Original element
Bombarding material Velocity/energy of bombarding material |
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In a nuclear equeation what are the 4 variables?
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Original element
bombarding material new element product emmision |
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In A/Z X(n, y)A/Z Y what is the y , the n, the X and Y?
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y= what is given off (gamma)
n= bombarding material (n's) X= original element Y= new element |
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If there are no isotopes of the original element in a RN what is this termed?
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Carrier-free
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3 parts of a nuclear reactor
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Target source (fixed)
Neutron source (mobile) Control rods (mobile) |
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What are control rods made out of?
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Cadmium
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What is the point of a control rod?
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Absorb excess neutrons to slow reaction, prevent meltdowns
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Fission always make carrier free RN's, T or F?
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True
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Range of Z# for products of fission?
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28-65
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What kind of reaction is this?
235/92 U(n,f)99/42 Mo |
Fission (f)
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What is the only way to produce Mo in the US?
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Fission
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Advantages of fission
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Carrier fre
High specific activity High activity generators Can elute generators w/ a small amount |
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Disadvantages of fission
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Expensive
Possible nuclear meltdown |
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Neutron activation is also called?
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neutron capture or neutron bombardment
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What is the only thing given off in neutron activation?
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Gamma ray due to temporary excited state of nucleus
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In neutron activation what happens to the A&Z#'s?
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A=increases by 1 (adding n)
Z=stays the same Means it's an isotope |
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Major disadvantages to neutron activation?
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Not carrier free and low specific activity
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2 variables in a particle accelerator?
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Charged particle ( p or p+n)
Target nucleus |
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What kind of particles can be used in particle accelerators?
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protons or protons+neutrons
ex 1/1p, 1/1H, 2/1H, 3/2He |
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How does a proton move into the nucleus in particle acceleration?
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high speed
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2 types of particle accelerators?
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Linear accelerator
Cyclotron |
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What is the difference in linear and cyclotron?
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Shape
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What is a Dee?
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The magnets found in a particle accelerator
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What kind of current is applied to Dees?
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AC
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4 parts of particle accelerators
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Voltage
Accelerating particles Dees Target nucleus |
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This is an example of what kind of reaction?
111/48Cd (p, n)111/49In |
Particle accelerator using a proton only
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What happens to A &Z#'s in particle accelerator rxn?
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A=stays same
Z+1 |
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66/30Zn +2/1d->67/31Ga +1/0n is an example of what kind of reaction?
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Particle accelerator with a deuteron
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Give A &Z#'s for tritium?
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3/1t
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Advantages to particle accelerators?
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Safe rxn
carrier free high specific activity |