Radiation Protection - Dentistry

The name of the subject:

• Radiation Protection

• Dosimetry

• Biophysics

• Radiometry

Which PROCESS is a kind of ionization?

• Photoeffect

• Gamma radiation

• Alpha radiation

• None of them

During a typical ionization process...

• An electron "moves" to a higher energy level.

• A free electron is created.

• An electron is emitted from the nucleus.

• A proton or neutron is emitted from the nucleus.

True about photoeffect:

• It is an ionization process generated by electrons.

• It is an ionization process generated by photons.

• During this process an electron and a photon is generated.

• This is a direct ionization process.

Nucleus of atoms contains

• neutrons, protons, electrons

• protons, photons, electrons

• nucleons

• neutrons and positrons

Isotope means

• same number of neutrons

• same number of positrons

• same mass number

• same atomic number

The difference between gamma and x-ray radiation

• the photon energy

• the wavelength

• the source of the radiation

• the activity

The beta positive particle is

• a helium nucleus (2protons+2neutrons)

• a proton

• an electron

• a positron

• a photon

The spectrum of an alpha decay is a...

• line spectrum

• continous spectrum

• band spectrum

• white spectrum

• nice spectrum

The energy of a beta particle of an isotope ...

• is in a given range

• is constant

• could be any value

• is the same as the energy of a neutrino