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dq1
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Homework Statement
(a) Consider a system composed of two electrons with orbital angular momentum
quantum numbers l_1 = 4 and l_2 = 2.
Give all the possible values of
(i) the total orbital angular momentum quantum number L,
(ii) the total angular momentum quantum number J. [8]
(b) Explain what is meant by the parity of an atomic or nuclear state. Show that
the state described by the wave-function [tex] $\psi= r cos \theta exp(r/2a) $ [/tex] has parity
quantum number -1.
Homework Equations
[tex]
$ J=L+S $\\
$ j=l \pm s $\\
$ L^2 = l(l+1) $\\
$ P \psi = e^{i\theta}\psi $
[/tex]
The Attempt at a Solution
I know this is probably extremely easy but I've been given no examples and I keep getting myself in a muddle. Are the answers for L and J suppose to come out as non integers?
[tex]
$ L^2 = l(l+1) $\\
$ L_1=\sqrt{20} = \pm 4.47 $ \\
$ L_2=\sqrt{6} = \pm 2.449 $\\
L = -6.919, -2.021, 2.021, 6.919
[/tex]
Are the negative values valid?