Splitting of fragmentation peaks of light ions in 56Fe + 9Be collisions at 0.23 GeV/nucleon

• Main Authors: Abramov B.M., Baznat M., Borodin Yu.A., Bulychjov S.A., Dukhovskoy I.A., Krutenkova A.P., Kulikov V.V., Martemianov M.A., Matsyuk M.A., Turdakina E.N.
• Format: Article
• Language: English
• Published: EDP Sciences 2019-01-01
• Series: EPJ Web of Conferences
• Online Access: https://www.epj-conferences.org/articles/epjconf/pdf/2019/09/epjconf_ishepp2019_03008.pdf

The FRAGM experiment at the ITEP-TWA heavy ion facility has a unique opportunity of measuring the momentum distributions of nuclear fragments. We present the results of 56Fe fragmentation into light ions on 9Be target at 0.23 GeV/nucleon. The momentum spectra of projectile like fragments were measured with a high resolution beam line spectrometer. In contrast to the carbon fragmentation, where the momentum spectra have Gaussian-like shapes, in the emission of the light fragments the shapes have a double-humped structure. This splitting is most pronounced in proton spectra. The possibility of describing this effect by asymmetric fission and multifragmentation is discussed. A comparison is made with the results of the FRS measurements at GSI. The obtained experimental data are in a reasonable agreement with the predictions of several transport codes such as BC, INCL and LAQGSM.