Radioactivity

1
Radioactivity
2
Definitions

• The radioactivity is the loss or profit of
  some particles.
• The nuclear fission is the break of his core
  to give other smaller cores.
• The nuclear fusion is the union of two small
• atoms to give a major core.

3
Radiations alpha, thread and gamma

• Alpha Particles formed by two protons and two
  neutrons. They have positive charge, are emitted
  to great speed but they have a very little
  capacity of penetration

4
Radiations alpha, beta and gamma

• Beta are formed by electrons. It has positive
  charge and it mass is very small. They have more
  capacity of penetration than the particles alpha.

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Radiations alpha, beta and gamma

• Gamma neutral radiation, of the same type of the
  light. It has great capacity of penetration. To
  stop them we need thick plates of concrete.

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Nuclear fission

• In the actions that are realized in the nuclear
  fission, there is liberated a great quantity of
  energy, nuclear energy, which is taken advantage
  in the nuclear power stations
• In the reaction of fission of the uranium
  235 great quantity of energy is obtained and
  there are liberated new neutrons that continue
  the process

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Nuclear fusion

• The nuclear fusion might be the employment as the
  source of energy. It would have the advantage of
  which radioactive residues do not happen though
  it has the problem of which in order that the
  merger of the cores happens the atoms must reach
  too high temperatures and the technology to
  advance sufficiently for it.

Nuclear fusion is responsible for the brightness
of stars
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USES OF RADIOACTIVE ISOTOPES

• taking into account the processes
  experienced by radioactive isotopes, we can
  identify three main applications
• At an energy source at nuclear power stations.
• At scientific research and experiments with
  alpha beta and gamma radiation to determine the
  age, and detect waste of ammunition to find out
  which transforms the substance.
• At medicine to diagnose disease and to cure some
  cancers

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Radioactive waste

• Radioactive waste have two fundamental
  characteristics
• They are very dangerous. Small quantities of
  residue can emit dangerous radiation for the
  human health.

thousands of years will be late in stopping
performing harmful to the health
They qualify in residues of fall, average and
high activity
Fall and average approximately 300 years stop
being dangerous
HighThey are very lasting. Some of them
continue emitting radiation during thousands of
years