Home › Forums › Hyperfine course › magnetic hyperfine interaction › in free atoms – task 1 › L, S and J This topic has 0 replies, 1 voice, and was last updated 7 months, 3 weeks ago by Hannes G.. Viewing 1 post (of 1 total) Author Posts April 29, 2024 at 2:28 pm #5767 Hannes G.Participant When L and S are parallel J = 2, perpendicular J = 1, opposing J = 0. This is easy seeable when thinking of vector addition. 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