Coulomb dissociation of 16O into 4He and 12C

Summary, in English

We measured the Coulomb dissociation of 16O into 4He and 12C at the R3B setup in a first campaign within FAIR Phase 0 at GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt. The goal was to improve the accuracy of the experimental data for the 12C(a,?)16O fusion reaction and to reach lower center-ofmass energies than measured so far. The experiment required beam intensities of 109 16O ions per second at an energy of 500 MeV/nucleon. The rare case of Coulomb breakup into 12C and 4He posed another challenge: The magnetic rigidities of the particles are so close because of the same mass-To-charge-number ratio A/Z = 2 for 16O, 12C and 4He. Hence, radical changes of the R3B setup were necessary. All detectors had slits to allow the passage of the unreacted 16O ions, while 4He and 12C would hit the detectors' active areas depending on the scattering angle and their relative energies. We developed and built detectors based on organic scintillators to track and identify the reaction products with sufficient precision. © Published under licence by IOP Publishing Ltd.

• Author: Kathrin Göbel; Joakim Cederkäll; Jason Park; Lorenzo Zanetti
• Department/s: Nuclear physics
• Publishing year: 2020
• Language: English
• Publication/Series: Journal of Physics: Conference Series
• Volume: 1668
• Links: http://dx.doi.org/10.1088/1742-6596/1668/1/012016
• Document type: Conference paper
• Publisher: IOP Publishing
• Topic: Subatomic Physics
• Keywords: Dissociation; Fusion reactions; Beam intensity; Charge number; Coulomb breakup; Coulomb dissociations; Magnetic rigidity; Organic scintillator; Relative energies; Scattering angles; Astrophysics
• Status: Published
• ISBN/ISSN/Other: ISSN: 1742-6596