Thermal bremsstrahlung photons probing the isospin dependence of the nuclear temperatures Fan Zhang, Cheng Li, Pei-Wei Wen, Jian-Wei Liu and Feng-Shou Zhang Eur. Phys. J. A, 54 10 (2018) 180 Published online: 25 October 2018 DOI: 10.1140/epja/i2018-12621-4