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