α -cluster structure in F 19 and Ne 19 in resonant scattering

Goldberg V.Z. Nurmukhanbetova A.K. Volya A. Nauruzbayev D.K. Serikbayeva G.E. Rogachev G.V.
January 2022 American Physical Society

Physical Review C
2022 #105 Issue 1

The nuclear structure of F19 and Ne19 is important for understanding of α clustering in the A=20 mass region and in questions related to astrophysics. However, the only high-resolution broad angular and energy range study of the F19 resonance structure in α+N15 scattering was published over 60 years ago, and a detailed analysis of complex excitation functions of overlapping resonances with several decay channels was simply impossible at that time. We performed a modern R-matrix analysis of these old data to assign spins and specify resonant parameters of levels up to excitation energy of 8.2 MeV in F19. We successfully tested our R-matrix parameters in a fit of the recent data on α+N15 obtained by thick target inverse kinematics (TTIK) method at 180 degrees. We used the new parameters for F19 to fit TTIK data for α+O15, the mirror resonant reactions. The comparison of the data for isobaric mirror resonant reactions provides an interesting insight into the nuclear structure.

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Cyclotron Institute, Texas AandM University, College Station, 77843-3366, TX, United States
Energetic Cosmos Laboratory, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
Department of Physics, Florida State University, Tallahassee, 32306-4350, FL, United States
Nazarbayev University Research and Innovation System, Nur-Sultan, 010000, Kazakhstan
Physics Department, School of Sciences and Humanities, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
Department of Physics and Astronomy, Texas AandM University, College Station, 77843, TX, United States
Nuclear Solutions Institute, Texas AandM University, College Station, 77843, TX, United States

Cyclotron Institute
Energetic Cosmos Laboratory
Department of Physics
Nazarbayev University Research and Innovation System
Physics Department
Department of Physics and Astronomy
Nuclear Solutions Institute

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