Gross, intermediate and fine structure of nuclear giant resonances: Evidence for doorway states Peter von Neumann-Cosel, Vladimir Yu. Ponomarev, Achim Richter and Jochen Wambach Eur. Phys. J. A, 55 12 (2019) 224 Published online: 02 December 2019 DOI: 10.1140/epja/i2019-12795-1