Compton scattering is the most dominant interaction in tissue.
A.
True
B.
False
11.
Bremsstrahlung x-rays are produced more where low Z# material is present.
A.
True
B.
False
12.
For the photoelectric effect to occur, the energy of the incident photon must be less than the binding energy of the orbital electron.
A.
True
B.
False
13.
A high energy, neutron poor nucleus would increase the probability of electron capture.
A.
True
B.
False
14.
Linear attenuation coefficient = HVL/0.693
A.
True
B.
False
15.
A proton poor nucleus undergoes decay by electron capture or positron emission.
A.
True
B.
False
16.
Isomeric transition is discharge of electromagnetic radiation in the form of a gamma ray from the nucleus.
A.
True
B.
False
17.
To eject a e-, you need less energy then the binding energy.
A.
True
B.
False
18.
X-rays originate from the e- shells.
A.
True
B.
False
19.
The difference in mass of the constituent particles and the total mass is called a mass defect.
A.
True
B.
False
20.
In gamma decay, the Z# changes by decreasing minus 1.
A.
True
B.
False
21.
The photoelectric effect occurs primarily in the low energy range with high Z# material, and decreases sharply with increasing photon energy.
A.
True
B.
False
22.
The main difference between a cutie pie ( ionization chamber) and the GM counter is operating potential.
A.
True
B.
False
23.
A GM counter is the best device for monitoring radiation levels of patients receiving radionuclides for I-131 therapy.
A.
True
B.
False
24.
Characteristic X-ray are discrete (unchangeable energy).
A.
True
B.
False
25.
Bremsstrahlung interactions produce x-rays of variable energies from 0 KeV to max defined by the maximum voltage or peak voltage applied between the filament and the target.
A.
True
B.
False
26.
The HVL is greater for high energy photons and smaller for high Z#.
A.
True
B.
False
27.
99% of all measurements fall within 2D of the mean of the Guassian shift.
A.
True
B.
False
28.
68% of all measurements fall with 3 SD of the the mean in a Guassian distribution.
A.
True
B.
False
29.
A highly charged particle (a++) has a longer range than a lower charged particle ( electromagnetic and B-)
A.
True
B.
False
30.
Gamma decay happens when a nucleus produces a high-energy packet of energy called a gamma ray. Which are true
A.
Gamma rays do not have mass or electrical charge, but they do have energy
B.
There is no change in mass or atomic number.
C.
Gamma rays are usually emitted from the daughter nuclei just after other types of decay due to the new atom formed having too much energy to be completely stable.
D.
Gamma rays do not have mass or electrical charge, but they do have energy; There is no change in mass or atomic number.
E.
All of these
31.
In a nucleus ( neutron rich , high N/Z) a neutron changes into a proton and the nucleus emits a negatively charged electron. The atomic number increases by one and the mass number stays the same. This refers to ______ decay.
