Home › Forums › Hyperfine course › magnetic hyperfine interaction › in free atoms – task 1 › L and S This topic has 0 replies, 1 voice, and was last updated 6 months, 3 weeks ago by Bram Hendrickx. Viewing 1 post (of 1 total) Author Posts March 13, 2024 at 9:55 am #5471 Bram HendrickxParticipant When S and L are parallel and point in the same direction J the total angular momentum is 2 for a system with S = 1 and L = 1. When L and S are perpendicular J = 1 -. Lastly when L and S are parallel but opposite in direction J = 0. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In