A double exponential Morse potential energy function for diatomic moleculesChangyi He, Zhixiang Fan, Hongrui Tian, Qunchao Fan, Huidong Li, Jia Fu and Feng XieEur. Phys. J. Plus, 140 5 (2025) 370DOI: https://doi.org/10.1140/epjp/s13360-025-06317-w