Nuclear Medicine Exam
Questions and Answers
Nuclides with the same atomic number but different numbers of neutrons are
called?
Ans- Isotopes
Two nuclides with the same atomic numbers are called?
Ans- Isobars
Two nuclides with the same number of neutrons but different atomic numbers
are called?
Ans- Isotones
What is a radionuclide?
,Ans- A nuclide that emits particular or photon energy to achieve a more stable
energy state
Another name for a helium ion containing two protons and two neutrons is?
Ans- an alpha particle
What is a beta particle?
Ans- An electron
Why are alpha particles and beta particles not used for imaging?
Ans- They do not exit the body efficiently and thus are not detected
What ratio of protons to neutrons favors beta decay?
Ans- A low proton-to-neutron ratio, as compared with stable nuclei
What two particles are emitted from the nucleus during beta decay?
Ans- A beta particle (electron) and an antineutrino
,What is the relationship between the mean energy of beta spectrum?
Ans- The mean energy is approximately one third of the maximum energy
What ratio of protons to neutrons favors positron decay?
Ans- A high proton-to-neutron ratio
What particles are released from the nucleus during positron decay?
Ans- A positron (antielectron) and Neutrino
What is the minimum amount of nuclear energy required for positron decay?
Ans- 1.02MeV
What is the fate of a positron?
Ans- To travel a short distance, combine with an electron, and be annihilated
, When a positron is annihilated via combination with an electron, the result is the
production of?
Ans- Two nearly opposed 511 keV photons
What ratio of protons to neutrons favors electron capture decay?
Ans- A high proton-to-neutron ratio
What particle is released from the nucleus during electron capture decay?
Ans- A neutrino
What is released from the nucleus during isometric transition?
Ans- Gama rays
Other than wavelength, frequency, and energy intensity, the fundamental
difference between X-rays and gamma rays is?
Ans- that x-rays are produced from energy released due to changes in the
quantum levels/values of orbital electrons of an atom, while gamma rays are
produced from energy shifts in the nucleus
Questions and Answers
Nuclides with the same atomic number but different numbers of neutrons are
called?
Ans- Isotopes
Two nuclides with the same atomic numbers are called?
Ans- Isobars
Two nuclides with the same number of neutrons but different atomic numbers
are called?
Ans- Isotones
What is a radionuclide?
,Ans- A nuclide that emits particular or photon energy to achieve a more stable
energy state
Another name for a helium ion containing two protons and two neutrons is?
Ans- an alpha particle
What is a beta particle?
Ans- An electron
Why are alpha particles and beta particles not used for imaging?
Ans- They do not exit the body efficiently and thus are not detected
What ratio of protons to neutrons favors beta decay?
Ans- A low proton-to-neutron ratio, as compared with stable nuclei
What two particles are emitted from the nucleus during beta decay?
Ans- A beta particle (electron) and an antineutrino
,What is the relationship between the mean energy of beta spectrum?
Ans- The mean energy is approximately one third of the maximum energy
What ratio of protons to neutrons favors positron decay?
Ans- A high proton-to-neutron ratio
What particles are released from the nucleus during positron decay?
Ans- A positron (antielectron) and Neutrino
What is the minimum amount of nuclear energy required for positron decay?
Ans- 1.02MeV
What is the fate of a positron?
Ans- To travel a short distance, combine with an electron, and be annihilated
, When a positron is annihilated via combination with an electron, the result is the
production of?
Ans- Two nearly opposed 511 keV photons
What ratio of protons to neutrons favors electron capture decay?
Ans- A high proton-to-neutron ratio
What particle is released from the nucleus during electron capture decay?
Ans- A neutrino
What is released from the nucleus during isometric transition?
Ans- Gama rays
Other than wavelength, frequency, and energy intensity, the fundamental
difference between X-rays and gamma rays is?
Ans- that x-rays are produced from energy released due to changes in the
quantum levels/values of orbital electrons of an atom, while gamma rays are
produced from energy shifts in the nucleus
