## Chapters on some Topic

here i organized some posts and group them into a more readable sequences. Enjoy.

reader should not be confused with the post’s name, coz i rearranged them so make it more “step by step” by reading one by one. Hope can help all beginner. ( who switched field when enter doctoral course and want to pick up things quick and deep )

# Scattering Theory

on Differential Cross Sections

- Cross Section
- density, flux & luminosity
- Differential Cross Section II
- Differential Cross Section
- Differential Cross Section III

Relation Between Differential Cross Section and Scatter Amplitude

a Quantum Mechanics Treatment on Scattered Amplitude

- Schrödinger Equation and Scatter Equation
- Green function
- Lippmann-Schwinger equation
- Born first approximation
- Scattering phase shift
- Scattered amplitude
- Woods-Saxon Shape
- Scattered amplitude on Woods-Saxon Shape

# Angular Momentum

- Laplacian in spherical coordinate (Operator in function form )
- angular momentum operator in matrix form
- Wigner-Eckart theorem
- Angular momentum Adding ( Product space )
- Clebsch – Gordan Coefficient ( recursion method )
- on Diagonalization (reminder)
- Clebsch – Gordan Coefficient II ( diagonalization method)
- Changing of frame
- Euler Angle
- Changing of frame II
- Rotation operator on x, y in Matrix form

# Nuclear Magnetic Resonance

- Larmor Precession
- Larmor Precession (detailed )
- NMR (nuclear magnetic resonance)
- on Relaxation in NMR
- On NMR signal
- On NMR noise reduction
- Thermal Polarization
- NMR circuit

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