Nuclear radius Flashcards

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1
Q

How does electron diffraction occur?

A
  • beam of high energy electrons
  • directed at a thin solid sample of an element
  • diffracted by nuclei
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2
Q

How is the beam of electrons produced?

A
  • accelerating electrons through a pd of the order of a hundred million volts
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3
Q

How are the electrons diffracted?

A
  • the de Broglie wavelength of such high energy electrons is of the order of 10-15
  • this is about the same as the diameter of the nucleus
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4
Q

WHat is the detector used to measure?

A
  • the number of electrons per second diffracted through different angles
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5
Q

What do the measurements show as the angle of the detector is increased?

A
  • intensity decreases then slightly increases then decreases again
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6
Q

How does scattering of the beam occur?

A
  • due to their charge
  • attracted to nuclei
  • this causes the intensity to decrease
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7
Q

Why do the results slightly increase in intensity?

A
  • maxima and minima to be superimposed
  • only happens when de Broglie wavelength is not greater than the dimension of the nucleus
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