HYPERFINE STRUCTURE MEASUREMENT OF SODIUMA TOMIC-BEAM ORTHOGONALLY WITH DYE LASER R6G. Iraqi Journal of Science [Internet]. 2024 Sep. 27 [cited 2025 Jul. 31];51(3):479-84. Available from: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/14022