7:4. SIMPLE MODEL FOR NEUTRON SCATTERING LENGTHS - PowerPoint PPT Presentation

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7:4. SIMPLE MODEL FOR NEUTRON SCATTERING LENGTHS

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chapter 7 neutron scattering theory 7:1. solution of the schrodinger equation 7:2. scattering cross sections 7:4. simple model for neutron scattering lengths – PowerPoint PPT presentation

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Title: 7:4. SIMPLE MODEL FOR NEUTRON SCATTERING LENGTHS


1
CHAPTER 7 NEUTRON SCATTERING THEORY
71. SOLUTION OF THE SCHRODINGER EQUATION
72. SCATTERING CROSS SECTIONS
74. SIMPLE MODEL FOR NEUTRON SCATTERING LENGTHS
2
71. SOLUTION OF THE SCHRODINGER EQUATION
Scattered spherical wave
Incident plane wave
3
DERIVATIONS
Schrodinger Equation
Hamiltonian
Eigenvalue (energy)
Eigenfunction
incident plane wave
scattered spherical wave
Scattering amplitude
4
72. SCATTERING CROSS SECTIONS
Incident neutron current
Scattered neutron current
Scattering cross section
5
74. SIMPLE MODEL FOR NEUTRON SCATTERING LENGTHS
6
DERIVATIONS
Schrodinger Equation
Solution outside of the well
Solution inside of the well
Boundary condition
Obtain
Combine to obtain transcendental equation
7
PLOT
8
COMMENTS
-- Scattering is not a quantum mechanics problem
(there are no bound states). It is a classical
mechanics problem. -- However, the Quantum
Mechanics formalism is well suited to describe
scattering.
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