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Nuclear Physic

non-imaging devices
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They are able to detect the type of radiation
Proportional counters:
Particulate radiations travel a shorter distance through matter than electromagnetic radiation because?
Particulate radiations have mass
What can you say about Gegier Muller counter?
They operate with a voltage higher than a dose calibrator, They are used to measure small amount of radioactivity, They use halogen gasses as the quenching gas.
A dose calibrator requires specific tests to be done periodically to make sure it's working properly. (Daily)
accuracy
Geometric dependence of a dose calibrator must be checked when?
At installation
Decay by electron capture (EC) is an alternative to?
Positron decay (Beta-Plus)
Decay by internal conversion (IC) is an alternative to the ?
Gamma- ray decay
The physical half-life of a radionuclide is the time it takes:
for the nuclide to decay to one half of the original activity.
Radioactive half life is the time?
required for radioactivity to reach one half of its original value.
A positively charged particle made up of two protons and two neutrons and released by a radioactive nucleus is called?
Alpha Particle
An electron released by a radioactive nucleus that causes a neutron to change into a proton is called?
Beta Particle
The amount of time for half the atoms in a radioactive sample to decay is called?
The half_life
The process in which the nuclei of unstable atoms can become more stable by emitting particles and/or electromagnetic radiation is called
radioactive Decay
High-energy electromagnetic radiation released by a radioactive nucleus are called
Gamma Ray
Aneutron in the nucleus decays into a proton, an electron, and an anti-neutrino is called a ?
Beta ray
What electromagnetic radiation can be stopped with a piece of paper?
Alpha particles
What electromagnetic radiation can be stopped with a thin metal sheet?
Beta particles
What electromagnetic radiation can be stopped with a thick metal sheet?
Gamma Ray
What electromagnetic radiation travel at the speed of light?
Gamma ray
What happens in a chain reaction?
Products that start a new reaction are released.