Angular Momentum Quantisation

In the solution, they've quantised angular momentum for the nucleus-electron system. However, as far as I know, Angular Momentum is quantised only for electrons revolving around nucleus. Is that true? Or do we just make an approximation that the nucleus is stationary, while in reality the angular momentum of the entire system is quantized.
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@Gyro Gearloose
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Xyphoes
XyphoesOP10mo ago
In short, my doubt is the line I = Mr1^2 + mr2^2 And then Iw = 2h/2pi That's the total MOI of the system, while L = nh/2pi is used only for electrons in orbits So is the TOTAL angular momentum of the system quantised?
myst1cboomer
myst1cboomer10mo ago
the smiple thing about this is that you just replace mass by reduced mass everywhere
Xyphoes
XyphoesOP10mo ago
Ok so we placed 2 bodies with a reduced mass About what point will the new body orbit and with what radius? nvm, just saw that the solution says r. Still confused about what point it will rotate tho
myst1cboomer
myst1cboomer10mo ago
they rotate about com (when you change the frame) it is like solar system as rutherford said
Xyphoes
XyphoesOP10mo ago
👍 thanks I'm assuming they took the distance as r itself since that's what comes from comparing both cases +solved @myst1cboomer
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