Shi Jun-Ru, Wang Xin-Liang, Guan Yong, Ruan Jun, Liu Dan-Dan, Bai Yang, Yang Fan, Zhang Hui, Yu Feng-Xiang, Fan Si-Chen, Zhang Shou-Gang. A method of accurately determining temperature of cold atomic cloud in atomic fountainJ. Acta Physica Sinica, 2019, 68(19): 190601. DOI: 10.7498/aps.68.20190115