Multichannel experimental and theoretical approach to the C 12 (O 18, F 18) B 12 single-charge-exchange reaction at 275 MeV. II. Competition between the meson exchange and the sequential transfer in the reaction mechanism

Spatafora A. Cappuzzello F. Carbone D. Cavallaro M. De Gregorio G. Lay J.A. Acosta L. Agodi C. Amador-Valenzuela P. Bellone J.I. Brischetto G.A. Calvo D. Chávez Lomelí E.R. Ciraldo I. Delaunay F. Djapo H. Eke C. Finocchiaro P. Firat S. Fisichella M. Gargano A. Hacisalihoglu A. La Fauci L. Lenske H. Linares R. Medina N. Moralles M. Oliveira J.R.B. Pakou A. Pandola L. Perrotta S.S. Petrascu H. Sgouros O. Da Silveira M.A.G. Solakci S.O. Soukeras V. Souliotis G. Torresi D. Tudisco S. Urazbekov B. Yildirim A. Zagatto V.A.B.
December 2024 American Physical Society

Physical Review C
2024 #110 Issue 6

Background: Single-charge-exchange reactions are among the most appropriate nuclear tools to study the response of nuclear systems to isovector interaction. Nowadays, the availability of powerful experimental setups and advanced nuclear models bring the possibility of the complete study of the reaction mechanisms involved in the nuclear reactions, also in the case of heavy projectiles. This new possibility allows one to access valuable information on key nuclear structure aspects, including those embedded in the widely searched neutrinoless double-β decay. Purpose: We intend to elucidate the main nuclear structure and reaction features involved in the O18 + C12 collision at 275 MeV beam incident energy. In this paper, the main focus is to quantify the competition between the sequential two-step transfer and the direct meson-exchange reaction mechanisms. Methods: The energy spectra and cross-section angular distributions for the C12(O18,F18)B12 single-charge-exchange reaction are measured by the MAGNEX magnetic spectrometer in the same experimental setup of the elastic and inelastic scattering and the one-nucleon transfer reaction channels. The cross sections for the sequential two-step transfer and the direct meson-exchange single-charge-exchange reaction mechanisms are evaluated in a single coherent theoretical calculation, using state-of-the-art nuclear structure and reaction theories. Results: The energy resolution achieved in the study of the C12(O18,F18)B12 single-charge-exchange reaction allows one to separate the ground-to-ground-state transition and to identify other structures in the measured energy spectra. The coherent sum of the distorted wave Born approximation cross sections of the direct and sequential reaction mechanisms well describes the experimental cross-section angular distributions. The crucial role of the optical model distortion in the scattering of the incoming and outgoing waves was taken into account via the introduction of the coupled-channel local equivalent effective potential. Conclusions: Advanced nuclear structure and reaction models turned out to be appropriate tools for the detailed analysis of single-charge-exchange reactions originating in heavy-ion collisions. This is of particular relevance in several fields of nuclear physics. Moreover, it is inherent to the challenging project to provide valuable information on neutrinoless double-β decay nuclear matrix elements from single- and double-charge-exchange cross-section measurements.

Text of the article Перейти на текст статьи

Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali Del Sud, Catania, Italy
Dipartimento di Fisica e Astronomia Ettore Majorana, Università di Catania, Catania, Italy
Dipartimento di Matematica e Fisica, Università della Campania Luigi Vanvitelli, Caserta, Italy
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, Italy
Departamento de FAMN, University of Seville, Spain
Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico
Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Cientificas, Madrid, 28006, Spain
Instituto Nacional de Investigaciones Nucleares, Ocoyoacac, Mexico
Istituto Nazionale di Fisica Nucleare, Sezione di Torino, Torino, Italy
Université de Caen Normandie, ENSICAEN, CNRS, IN2P3, LPC Caen, UMR6534, Caen, F-14000, France
Ankara University, Institute of Accelerator Technologies, Ankara, Turkey
Department of Mathematics and Science Education, Faculty of Education, Akdeniz University, Antalya, 07058, Turkey
Department of Physics, Akdeniz University, Antalya, 07058, Turkey
Grand Accélérateur National dIons Lourds, Boulevard Henri Becquerel, CS 55027, Caen, F-14076, France
Institute of Natural Science, Karadeniz Teknik Universitesi, Trabzon, Turkey
Department of Physics, Recep Tayyip Erdogan University, Rize, Turkey
Turkish Accelerator and Radiation Laboratory, Ankara, Turkey
Institut für Theoretische Physik, Justus-Liebig-Universität Giessen, Gießen, 35392, Germany
Instituto de Fisica, Universidade Federal Fluminense, Niteroi, Brazil
Instituto de Pesquisas Energeticas e Nucleares, IPEN, CNEN, Sao Paulo, Brazil
Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo, Brazil
Department of Physics, University of Ioannina, Hellenic Institute of Nuclear Physics, Ioannina, Greece
Lawrence Livermore National Laboratory, Livermore, 94550, CA, United States
Institutul National de Cercetare-Dezvoltare Pentru Fizica Si Inginerie Nucleara Horia Hulubei, Bucarest, Romania
Centro Universitario FEI, Sao Bernardo do Campo, Brazil
Department of Chemistry, University of Athens, Hellenic Institute of Nuclear Physics, Athens, Greece
Department of Nuclear Physics and Nanotechnology, L N Gumilyov Eurasian National University, Satpayev Street 2, Astana, 010008, Kazakhstan
Institute of Nuclear Physics, Laboratory of Low Energy Reactions, Ibragimov Street 1, Almaty, 050032, Kazakhstan

Istituto Nazionale di Fisica Nucleare
Dipartimento di Fisica e Astronomia Ettore Majorana
Dipartimento di Matematica e Fisica
Istituto Nazionale di Fisica Nucleare
Departamento de FAMN
Instituto de Física
Instituto de Estructura de la Materia
Instituto Nacional de Investigaciones Nucleares
Istituto Nazionale di Fisica Nucleare
Université de Caen Normandie
Ankara University
Department of Mathematics and Science Education
Department of Physics
Grand Accélérateur National dIons Lourds
Institute of Natural Science
Department of Physics
Turkish Accelerator and Radiation Laboratory
Institut für Theoretische Physik
Instituto de Fisica
Instituto de Pesquisas Energeticas e Nucleares
Instituto de Fisica
Department of Physics
Lawrence Livermore National Laboratory
Institutul National de Cercetare-Dezvoltare Pentru Fizica Si Inginerie Nucleara Horia Hulubei
Centro Universitario FEI
Department of Chemistry
Department of Nuclear Physics and Nanotechnology
Institute of Nuclear Physics

10 лет помогаем публиковать статьи Международный издатель

Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026