If I=0, then j=s,mj=ms, and the "good" states are the same (nms)for weak and strong fields. DetermineEz1(from Equation) and the fine structure energies (Equation 6.67), and write down the general result for the I=O Zeeman Effect - regardless of the strength of the field. Show that the strong field formula (Equation 6.82) reproduces this result, provided that we interpret the indeterminate term in square brackets as.

Short Answer

Expert verified

The EZ1=e2mBext2msħand the fine structure energies is

E=-13.6eVn21+α2n2n-34+2msBexteħ2m

Step by step solution

01

Definition of Zeeman Effect.

In the presence of a static magnetic field, the Zeeman Effect causes a spectral line to break into numerous components.

02

Step2: Structural isomers of carboxylic acids.

Use the equation 6.72,

Ez1=e2mBext.L+2S=e2mBext2msħ

Fine structure energy (with j=1/2),

Enj=-13.6eVn21+α2n2n-34Etot=-13.6eVn21+α2n2n-34+2mSBext2m

Fine structure term is proportional to α2;

Efs1=-13.6eVn4α2n-34=13.6eVn3α234n-1

{Same as equation } with the term in square brackets set equal to 1.

Efs1=13.6eVn3α234n-II+1-mImsII+1/2I+1

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Most popular questions from this chapter

(a) Plugs=0,s=2, and s=3into Kramers' relation (Equation 6.104) to obtain formulas for (r-1),(r),(r-2),and(r3). Note that you could continue indefinitely, to find any positive power.

(b) In the other direction, however, you hit a snag. Put in s=-1, and show that all you get is a relation between role="math" localid="1658216018740" (r-2)and(r-3).

(c) But if you can get (r-2)by some other means, you can apply the Kramers' relation to obtain the rest of the negative powers. Use Equation 6.56(which is derived in Problem 6.33) to determine (r-3) , and check your answer against Equation 6.64.

Consider a charged particle in the one-dimensional harmonic oscillator potential. Suppose we turn on a weak electric field (E), so that the potential energy is shifted by an amountH'=-qEx.(a) Show that there is no first-order change in the energy levels, and calculate the second-order correction. Hint: See Problem 3.33.

(b) The Schrödinger equation can be solved directly in this case, by a change of variablesx'x-(qE/2). Find the exact energies, and show that they are consistent with the perturbation theory approximation.

Prove Kramers' relation:

sn2rs-(2s+1)ars-1+s4[(2l+1)2-s2]a2rs-2=0

Which relates the expectation values of rto three different powers (s,s-1,ands-2),for an electron in the state ψn/mof hydrogen. Hint: Rewrite the radial equation (Equation) in the form

u''=[l(l+1)r2-2ar+1n2a2]u

And use it to expressrole="math" localid="1658192415441" (ursu'')drin terms of (rs),(rs-1)and(rs-2). Then use integration by parts to reduce the second derivative. Show that (ursu'')dr=-(s/2)(rs-1)and(u'rsu')dr=-[2/s+1](u''rs+1u')dr. Take it from there.

Consider the isotropic three-dimensional harmonic oscillator (Problem 4.38). Discuss the effect (in first order) of the perturbation H'=λx2yz

(for some constant λ) on

(a) the ground state

(b) the (triply degenerate) first excited state. Hint: Use the answers to Problems 2.12and 3.33

Consider the (eight) n=2states, |2ljmj. Find the energy of each state, under weak-field Zeeman splitting, and construct a diagram like Figure 6.11 to show how the energies evolve asBext increases. Label each line clearly, and indicate its slope.

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