Find the energy eigenvalues and eigenfunctions for the hydrogen atom. The potential
Chapter 13, Problem 22(choose chapter or problem)
Find the energy eigenvalues and eigenfunctions for the hydrogen atom. The potential energy is V (r) = e2/r in Gaussian units, where e is the charge of the electron and r is in spherical coordinates. Since V is a function of r only, you know from that the eigenfunctions are R(r) times the spherical harmonics Y m l (, ), so you only have to find R(r). Substitute V (r) into the R equation in and make the following simplifications: Let x = 2r/, y = rR; show that then r = x/2, R(r) = 2 xy(x), d dr = 2 d dx, d dr r2 dR dr = 2 xy. Let 2 = 2ME/h2 (note that for a bound state, E is negative, so 2 is positive) and = Me2/h2, to get the first equation in 22.26 of Chapter 12. Do this problem to find y(x), and the result that is an integer, say n. [Caution: not the same n as in equation (22.26)]. Hence find the possible values of (these are the radii of the Bohr orbits), and the energy eigenvalues. You should have found proportional to n; let = na, where a is the value of when n = 1, that is, the radius of the first Bohr orbit. Write the solutions R(r) by substituting back y = rR, and x = 2r/(na), and find En from .
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