Welcome back from fall break Comments on mid-term exam

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Presentation transcript:

Welcome back from fall break Comments on mid-term exam PHY 741 Quantum Mechanics 12-12:50 PM MWF Olin 103 Plan for Lecture 19: Welcome back from fall break Comments on mid-term exam Comments on “computational projects” Quantum mechanics of atoms (Chapter 13) 10/16/2017 PHY 741 Fall 2017-- Lecture 19

Three events this week -- + pizza 10/16/2017 PHY 741 Fall 2017-- Lecture 19

10/16/2017 PHY 741 Fall 2017-- Lecture 19

10/16/2017 PHY 741 Fall 2017-- Lecture 19

Example: Particle of mass m confined within an finite square well: V(x) V0 V0 x a 10/16/2017 PHY 741 Fall 2017-- Lecture 19

After some algebra, we found that the energy eigenvalues E were solutions of transcendental equations: For even parity For odd parity 10/16/2017 PHY 741 Fall 2017-- Lecture 19

x/a 10/16/2017 PHY 741 Fall 2017-- Lecture 19

x/a 10/16/2017 PHY 741 Fall 2017-- Lecture 19

10/16/2017 PHY 741 Fall 2017-- Lecture 19

10/16/2017 PHY 741 Fall 2017-- Lecture 19

10/16/2017 PHY 741 Fall 2017-- Lecture 19

10/16/2017 PHY 741 Fall 2017-- Lecture 19

10/16/2017 PHY 741 Fall 2017-- Lecture 19

10/16/2017 PHY 741 Fall 2017-- Lecture 19

10/16/2017 PHY 741 Fall 2017-- Lecture 19

10/16/2017 PHY 741 Fall 2017-- Lecture 19

Picking topic for “project” Prepare ~ 10 minute presentation to teach us (and yourself) something related to quantum mechanics Similar effort to take-home exam Can combine with classical mechanics project 10/16/2017 PHY 741 Fall 2017-- Lecture 19

Back to the quantum mechanics of atoms 10/16/2017 PHY 741 Fall 2017-- Lecture 19

Shell structure of atoms based on Hartree and Hartree-Fock treatments 10/16/2017 PHY 741 Fall 2017-- Lecture 19

Shell structure of atoms Principal Quantum Angular momentum Number of Number Quantum Number States n=1 l=0 (s) 2 n=2 l=0 (s) 2 l=1 (p) 6 n=3 l=0 (s) 2 l=2 (d) 10 n=4 l=0 (s) 2 l=3 (f) 14 10/16/2017 PHY 741 Fall 2017-- Lecture 19

10/16/2017 PHY 741 Fall 2017-- Lecture 19

Self-consistent treatment of the Veff(r) 10/16/2017 PHY 741 Fall 2017-- Lecture 19

Example for carbon 10/16/2017 PHY 741 Fall 2017-- Lecture 19

Results for carbon 1s 2p Pnl(r) 2s E1s=-19.9 Ry E2s=-1.0 Ry E2p=-0.4 Ry r (Bohr) 10/16/2017 PHY 741 Fall 2017-- Lecture 19