Benchmarking the PreSPEC@GSI experiment for Coulex-multipolarimetry on the $$\pi (p_{3/2})\rightarrow \pi (p_{1/2})$$ spin-flip transition in $$^{85}\hbox {Br}$$P. Napiralla, C. Lizarazo, C. Stahl et al.|The European Physical Journal A|2020Cited by 4