17 Avigo, R. Wieland, O. Bracco, A. Camera, F. Ameil, F. Arici, T. Ataç, A. Barrientos, D. Bazzacco, D. Bednarczyk, P. Benzoni, G. Birkenbach, B. Blasi, N. Boston, H. C. Bottoni, S. Brambilla, S. Bruyneel, B. Ciemała, M. Clément, E. Cortes, Martha Liliana Crespi, F. C. L. Cullen, D. M. Curien, D. Didierjean, F. Domingo-Pardo, C. Duchêne, G. Eberth, J. Görgen, A. Gadea, A. Gerl, J. Goel, N. Golubev, P. González, V. Górska, M. Gottardo, A. Gregor, E. Guastalla, Giulia Habermann, T. Harkness-Brennan, L. J. Jungclaus, A. Kmiecik, M. Kojouharov, I. Korten, W. Kurz, N. Labiche, M. Lalović, N. Leoni, S. Lettmann, M. Maj, A. Menegazzo, R. Mengoni, D. Merchan, Edana Million, B. Morales, A. I. Napoli, D. R. Nociforo, C. Nyberg, J. Pietralla, N. Pietri, S. Podolyák, Zs. Ponomarev, V. Yu. Pullia, A. Quintana, B. Rainovski, G. Ralet, D. Recchia, F. Reese, M. Regan, P. Reiter, P. Riboldi, S. Rudolph, D. Salsac, M. D. Sanchis, E. Sarmiento, L. G. Schaffner, H. Simpson, J. Stezowski, O. Valiente-Dobón, J. J. Wollersheim, H. J. KSP SFS DTL EEL Physics letters / B Physics letters / B North-Holland Publ. Amsterdam 0370-2693 10.1016/j.physletb.2020.135951 English 135951 811 The γ -ray emission from the nuclei $^{62,64}$Fe following Coulomb excitation at bombarding energy of 400-440 AMeV was measured with special focus on E 1 transitions in the energy region 4-8 MeV. The unstable neutron-rich nuclei $^{62,64}$Fe were produced at the FAIR-GSI laboratories and selected with the FRS spectrometer. The γ decay was detected with AGATA. From the measured γ -ray spectra the summed E 1 strength is extracted and compared to microscopic quasi-particle phonon model calculations. The trend of the E 1 strength with increasing neutron number is found to be fairly well reproduced with calculations that assume a rather complex structure of the 1$^−$ states (three-phonon states) inducing a strong fragmentation of the E 1 nuclear response below the neutron binding energy. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3 ; PUB:(DE-HGF)16, ; 0, ; 64 Fe 62 Fe Nuclear structure Dipole excitation around neutron threshold 64Fe 62Fe WOS:000612225400080 Journal Article 2020 GSI-2021-00581 2020 https://repository.gsi.de/record/237998 https://doi.org/10.1016/j.physletb.2020.135951 <Go to ISI>://WOS:000612225400080