Scattering amplitude in scattering from a delta function

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SUMMARY

The discussion focuses on calculating the scattering amplitude for a potential defined as 𝑉(𝑟⃗) = 𝑔𝛿(𝑟⃗) using the Born approximation. The key equation involved is f(θ) = C ∫ dr rV(r)sin(qr). Participants emphasize the importance of showing prior work to receive assistance, highlighting the necessity of understanding Fourier transforms in this context.

PREREQUISITES
  • Understanding of the Born approximation in quantum mechanics
  • Familiarity with Fourier transforms and their applications in scattering theory
  • Knowledge of Dirac delta function properties in three dimensions
  • Basic concepts of scattering amplitude and its derivation
NEXT STEPS
  • Study the derivation of scattering amplitudes using the Born approximation
  • Learn about the properties and applications of the Dirac delta function in quantum mechanics
  • Explore Fourier transform techniques specifically in the context of quantum scattering
  • Investigate the relationship between scattering length and potential strength in quantum systems
USEFUL FOR

Students and researchers in quantum mechanics, particularly those focusing on scattering theory and potential analysis, will benefit from this discussion.

joaosantossilva
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Homework Statement
Show that for a potential of type 𝑉 (𝑟⃗) = 𝑔𝛿 (𝑟⃗), where 𝑔 is a constant and 𝛿 (𝑟⃗) is the delta function of Dirac 3D. Using the Born approximation, determine the scattering amplitude and derive an expression for 𝑔 so that the scattering length is b.
Relevant Equations
f(θ) = C ∫ dr rV(r)sin(qr)
I tried to calculate the Fourier transform to get the amplitude, but I got lost
 
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Welcome to the PF. :smile:
joaosantossilva said:
Homework Statement:: Show that for a potential of type 𝑉 (𝑟⃗) = 𝑔𝛿 (𝑟⃗), where 𝑔 is a constant and 𝛿 (𝑟⃗) is the delta function of Dirac 3D. Using the Born approximation, determine the scattering amplitude and derive an expression for 𝑔 so that the scattering length is b.
Homework Equations:: f(θ) = C ∫ dr rV(r)sin(qr)

I tried to calculate the Fourier transform to get the amplitude, but I got lost
Fun problem. But per the PF rules, we can only help you after you show your work. Please show what you have done so far. Thanks.
 
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