How Can J Be a Fraction in Spectroscopic Notation?

In summary, spectroscopic notation is a system used to represent the energy levels and orbitals of electrons in an atom. It is important for communication and understanding of electron configuration, as well as providing insight into the properties and interactions of elements. It is written with numbers and letters representing energy levels and sublevels, and the number of electrons in each sublevel. It differs from orbital notation in that it does not show the spin of electrons, and it can be determined using the diagonal rule or Aufbau principle.
  • #1
MariusM
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Homework Statement


Consider a [itex]^3D_X[/itex] where [itex]X=3/2[/itex] state.

a) What are the possible values of [itex]S, L, J[/itex] and [itex]J_z[/itex]?

Homework Equations


Spectroscopic notation for this LS coupling is [itex]^YL_J[/itex] where [itex]Y=2S+1[/itex]. [itex]J[/itex] ranges from[itex]|L-S|[/itex] to [itex]|L+S|[/itex]

The Attempt at a Solution


Since [itex]L=2[/itex] and [itex]S[/itex] must be equal to [itex]1[/itex], how can [itex]J[/itex] be a fraction? Shouldn't [itex]J[/itex] be either [itex]1, 2, 3[/itex]?
 
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  • #2
You are absolutely right. The problem is incorrect as it stands.
 
  • #3
Thanks for helping me clarify this!
 
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