In-beam γ-spectroscopy with relativistic radioactive ion beams

S. Wan, J. Gerl, J. Cub, J. M. Holeczek, P. Reiter, D. Schwalm, T. Aumann, K. Boretzky, W. Dostal, B. Eberlein, H. Emling, Ch Ender, Th W. Elze, H. Geissel, A. Grünschloß, R. Holzmann, N. Iwasa, M. Kaspar, A. Kleinböhl, O. KoschorrekY. Leifels, A. Leistenschneider, I. Peter, H. Schaffner, C. Scheidenberger, R. Schubart, R. Schubert, H. Simon, G. Stengel, A. Surowiec, H. J. Wollersheim

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23 Citations (Scopus)


This work demonstrates the feasibility of in-beam γ-spectroscopy employing radioactive ion beam species at relativistic energies of E = 210 ∼ 280 A·MeV. Neutron-rich nuclei below 48Ca with neutron number between the two magic numbers 20 and 28 have been investigated. Using a Pb target, single step inelastic excitation originating mainly from Coulomb interaction takes place populating preferentially low-lying low-spin states and enabling the extraction of B(E2) values. On a C target, nucleon removal reactions are dominating and medium-spin states are populated thus offering spectroscopic information in neighboring nuclei. Cross sections of inelastic excitation are determined and compared to coupled-channels calculations. Two new states of the very neutron-rich nucleus 44Ar at 1.78(8) MeV and 2.61(16) MeV are deduced from γ-transitions.

Original languageEnglish
Pages (from-to)167-174
Number of pages8
JournalEuropean Physical Journal A
Issue number2
Publication statusPublished - 1999


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