RADIOACTIVIY 2 Flashcards
This is a sequence of unstable atomic nuclei and their modes of decays which leads to a stable nucleus.
decay chain
This decay occurs when the neutron to proton ratio is too great in the nucleus and causes instability.
beta decay
This mode of decay usually happens to very large atoms (high atomic numbers) having too low neutron/proton ratio.
alpha
In this mode of decay, the excess of energy of the nucleus is transmitted to the orbital electron of an atom which is subsequently ejected from the atom.
internal conversion
During this decay, the atom has then lost two protons along with two neutrons.
alpha
Mode of radioactivity decay wherein a k-shell electron falls inside the nucleus which results in the transformation of a proton into a neutron and an ejection of neutrino.
electron capture
This type of equilibrium exists when the half-life of the parent nuclide is infinitely larger than that of the daughter nuclide.
Secular Equilibrium
This term refers to the chain of decay for naturally occurring radioactive elements.
radioactive series
This type of equilibrium exists when the half-life of the parent nuclide is still larger than that of the daughter nuclide but not infinitely.
transient equilibrium
It is a particle with same mass as an electron but with a positive charge and is considered an antimatter version of an electron.
positron
During this mode of decay, one of the neutrons changes into a proton (which stays in the nucleus) and an electron together with the electron antineutrino.
beta decay
has very large atom
alpha
radionuclide BELOW the stability line decays by?
B+emission
radionuclide ABOVE the stability line decays by?
B-emission
half life of the daughter nuclide is larger than the parent
no equilibrium
