6. Reflectance and Transmittance at a Potential Step A beam of protons, each with kinetic energy 40 MeV, approaches a downward step potential of -30 MeV. (a) What fraction of the beam is reflected? (b) How does your answer change if the particles are electrons? V (x) E = 40 MeV V=0 30 MeV Now if the step is upward with V=+100 MeV, (c) what fractions of the particles are reflected for? And what are the penetration depths into the barrier for (d) protons and (e) electrons?
6. Reflectance and Transmittance at a Potential Step A beam of protons, each with kinetic energy 40 MeV, approaches a downward step potential of -30 MeV. (a) What fraction of the beam is reflected? (b) How does your answer change if the particles are electrons? V (x) E = 40 MeV V=0 30 MeV Now if the step is upward with V=+100 MeV, (c) what fractions of the particles are reflected for? And what are the penetration depths into the barrier for (d) protons and (e) electrons?
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Transcribed Image Text:6. Reflectance and Transmittance at a Potential Step
A beam of protons, each with kinetic energy 40 MeV, approaches a downward step potential of
-30 MeV. (a) What fraction of the beam is reflected? (b) How does your answer change if the
particles are electrons?
V (x)
E = 40 MeV
V=0
30 MeV
X
Now if the step is upward with = +100 MeV, (c) what fractions of the particles are reflected
for? And what are the penetration depths into the barrier for (d) protons and (e) electrons?
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