DOE OSTI · 3001594
Direct reactions with the AT-TPC
Abstract
Direct reactions are crucial tools for accessing properties of the atomic nucleus. Fundamental and exotic phenomena such as collective modes, pairing, weakbinding effects and evolution of single-particles energies can be investigated in peripheral collisions between a heavy nucleus and a light target. The necessity of using inverse kinematics to reveal how these structural properties change with isospin imbalance renders direct reactions a challenging technique when using the missing mass method. In this scenario, Active Target Time Projection Chambers (AT-TPC) have demonstrated an outstanding performance in enabling these types of reactions even under conditions of very low beam intensities. The AT-TPC of the Facility for Rare Isotope Beams (FRIB) is a next generation multipurpose Active Target. When operated inside a solenoidal magnet, direct reactions benefit from the measurement of the magnetic rigidity that enables particle identification and the determination of the excitation energy with high resolution without the need of auxiliary detectors. Additionally, the AT-TPC can be coupled to a magnetic spectrometer improving even further its spectroscopic investigation capability. In this contribution, we discuss inelastic scattering and transfer reaction data obtained via the AT-TPC and compare them to theory. In particular, we present the results for the 14 C(p,p′) and 12 Be (p,d) 11 Be reactions. For 14 C, we compare the experimental excitation energy of the first 1 – excited state with coupled-cluster calculationsbased on nuclear interactions from chiral effective field theory and with available shell-model predictions. For 12 Be, we determine the theoretical spectroscopic factors of the 12 Be (p,d) 11 Be transfer reaction in the shell modeland compare them to the experimental excitation spectrum from a qualitative standpoint.
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Ayyad, Yassid [Universidade de Santiago de Compostela (Spain)], Bazin, Daniel [Michigan State University, East Lansing, MI (United States)], Bonaiti, Francesca [Michigan State University, East Lansing, MI (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)], Chen, Jie [Southern University of Science and Technology, Guangdong (China)], Li, Xiaobin [Southern University of Science and Technology, Guangdong (China)], Anthony, Adam [High Point University, NC (United States)], Avila, Melina [Argonne National Laboratory (ANL), Argonne, IL (United States)], Beceiro-Novo, Saul [Universidade da Coruña, Ferrol (Spain)], Bhatt, Khushi [Argonne National Laboratory (ANL), Argonne, IL (United States)], Cabo, Cristina [Universidade de Santiago de Compostela (Spain)], Furuno, Tatsuya [Osaka University (Japan)], Guimarães, Valdir [Universidade de São Paulo (Brazil)], Hall-Smith, Alex [Argonne National Laboratory (ANL), Argonne, IL (United States)], Hunt, Curtis [Michigan State University, East Lansing, MI (United States)], Jayatissa, Heshani [Argonne National Laboratory (ANL), Argonne, IL (United States)], Kawabata, Takahiro [Osaka University (Japan)], Kumi, Harriet [Universidade da Coruña, Ferrol (Spain)], López-González, Jose Manuel [Universidade de Santiago de Compostela (Spain)], Lois-Fuentes, Juan [Michigan State University, East Lansing, MI (United States)], Macchiavelli, Augusto [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)], McCann, Gordon [Michigan State University, East Lansing, MI (United States)], Müller-Gatermann, Claus [Argonne National Laboratory (ANL), Argonne, IL (United States)], Muñoz-Ramos, Alicia [Universidade de Santiago de Compostela (Spain)], Mittig, Wolfgang [Michigan State University, East Lansing, MI (United States)], Olaizola, Bruno [Instituto de Estructura de la Materia, Madrid (Spain)], Rahman, Zarif [Michigan State University, East Lansing, MI (United States)], Regueira, Daniel [Universidade de Santiago de Compostela (Spain)], Rufino, Javier [University of Notre Dame, IN (United States)], Sakajo, Soki [Osaka University (Japan)], Santamaria, Clementine [Michigan State University, East Lansing, MI (United States)], Serikow, Michael Z. [Michigan State University, East Lansing, MI (United States)], Tang, Tianxudong [Michigan State University, East Lansing, MI (United States)], Tolstukhin, Ivan [Argonne National Laboratory (ANL), Argonne, IL (United States)], Turi, Nathan [Michigan State University, East Lansing, MI (United States)], Watwood, Nathan [Argonne National Laboratory (ANL), Argonne, IL (United States)], Zamora, Juan [Michigan State University, East Lansing, MI (United States)]. 2025-03-24. Direct reactions with the AT-TPC. https://doi.org/10.3389/fphy.2025.1539148
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