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Vector coupling of angular momentum.ppt

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Vector coupling of angular momentum.ppt

上传人:陈潇睡不醒 2020/8/23 文件大小:1.46 MB

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Vector coupling of angular momentum.ppt

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文档介绍:VectorcouplingofangularmomentumTotalAngularMomentumL,Lz,S,SzJandJzarequantizedOrbitalangularmomentumSpinangularmomentumTotalangularmomentumTotalAngularMomentumIfjandmjarequantumnumbersforthesingleelectron(hydrogenatom),theadditionmustbedonevectorially,.Spin-OrbitCouplingAneffectofthespinsoftheelectronandtheorbitalangularmomentuminteractioniscalledspin-orbitcoupling. icfieldduetotheproton wherecosaistheanglebetweenThedipolepotentialenergy icmomentµ. .icfield:icfield:willprecessaboutTotalAngularMomentumNowtheselectionrulesforasingle-eΔn=anything Δℓ=±1Δmj=0,±1 Δj=0,±1Hydrogenenergy-leveldiagramforn=2andn=3withthespin-orbitsplittingTheEnergy-LevelDiagramofSodiumMany-ElectronAtomsHund’srules:,,-binefourangularmomentaJ.