Recent content by rovert

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    How Do You Compute Ground-State Energy Using First-Order Perturbation Theory?

    I now see what you are saying. See how bad I am at this stuff. I didn't really even know what you meant at first with the spherical coordinates. By using this r^2 sin(other stuff), I will be able to eliminate the 1/(r^2) term in my integral, correct? Is the other stuff in the volume element...
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    How Do You Compute Ground-State Energy Using First-Order Perturbation Theory?

    OdlerDan, it actually makes it worse for me to do it in spherical coordinates. The major problem here is I am not up to parr on the math it takes to do quantum mechanics (I have a mainly chemistry background). I have pulled all the constants out and am now left with: ∫ e^(-Zr/a0) (1/r2)...
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    How Do You Compute Ground-State Energy Using First-Order Perturbation Theory?

    OK, now I have: ∫ π^(1/2)(Z/a0)^(3/2)e^(-Zr/a0) (b/r2) π^(1/2)(Z/a0)^(3/2)e^(-Zr/a0) dr which is equal to: b∫ π^(1/2)(Z/a0)^(3/2)e^(-Zr/a0) (1/r2) π^(1/2)(Z/a0)^(3/2)e^(-Zr/a0) dr Now I am stuck again because I need help with this integral. Anyone? Thanks
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    How Do You Compute Ground-State Energy Using First-Order Perturbation Theory?

    Homework Statement Consider a perturbed hydrogen atom whose Hamiltonian, in atomic units, is: H= -1/2(∆^2) – ½ + b/(r^2) (∆ should be upside down), where b is a positive constant. The Schrodinger equ. for this hamiltonian can be solved exactly for the energy eigenvalues. The...
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    Finding the Hamiltonian for the Be Atom without Nuclear Terms

    Thanks for your help. I think I've got it now. Since I can make the Born-Oppenheimer approximation, I can leave KE for the nucleus out (basically ignore the nucleus all together) which I know is a HUGE assumption to make, but that is what the problem instructs.
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    Finding the Hamiltonian for the Be Atom without Nuclear Terms

    Be has 4 electrons. Yes, they are assumed point charges. Electron spin should be included. Does it start with H=(-ћ2/2m)∑…? That is where I thought I should start, but am stuck after that. I have never seen a Hamiltonian developed for a many-electron atom.
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    Finding the Hamiltonian for the Be Atom without Nuclear Terms

    I have a problem that uses the QM Hamiltonian for the berylium atom, but I am having trouble finding this Hamiltonian using the Born-Oppenheimer approximation (leaving out the nuclear-nucler and nucler-electron terms). Any know how to get this?
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