1 Supporting Information A Combined Experimental and Computational Study on the   � ′/    �  ′′ − � ′   Transition of the Calcium Isopropoxide Radical as a Candidate for Direct Laser Cooling Hamzeh Telfah, 1,† Anam C. Paul, 1,‡ S. M. Shah Riyadh ,2, and Jinjun Liu 1,2,* 1. Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States 2. Department of Physics and Astronomy, University of Louisville, Louisville, Kentucky 40292, United States * Corresponding Author. E-mail: j.liu@louisville.edu. † Current address: Department of Mechanical and Aerospace Engineering, the Ohio State University, Columbus, OH 43210, USA. ‡ Current address: Veeco Instruments, Inc., San Jose, CA 95134, USA. Electronic Supplementary Material (ESI) for Physical Chemistry Chemical Physics. This journal is © the Owner Societies 2022