Fission Flashcards

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1
Q

What are the isotopes commonly used?

A
  • 235U
  • 239Pu
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2
Q

What is induced fission?

A
  • where the nucleus of an isotope is bombared by neutrons and neutrons are absorbed
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3
Q

What are fission neutrons?

A
  • neutrons released in fission event
  • capable of causing a further fission event
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4
Q

What is a chain reaction>

A
  • chain reaction therefore possible in which fission neutrons produce firther fission events which release fission events and cause further fission events
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5
Q

How is energy released in a fission event?

A
  • occurs because the fragments repel each other as they are both positively charged with enough force to overcome the strong nuclear force holding them together
  • fragment nuclei and fission neutrons gain Ek
    • binding energy per nucleon increases
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6
Q

WHen does fusion occur?

A
  • nuclear fusion can only take place if the two nuclei that are to be combined collide at high speed
  • necessary to overcome electrostatic repulsion between the two nuclei so they can become close enough to interact through SNF
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7
Q

How is solar energy produced?

A
  • fusion
  • high temp strips protons of electrons, referred to as plasma
  • nuclei move at high speed because of temperature
    • large enough to overcome electrostatic force
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