O-18 + Se-76 elastic and inelastic scattering at 275 MeV

Autor(es):Mostrar menos -

La Fauci, L. ^{[1, 2]} ; Spatafora, A. ^{[1, 2]} ; Cappuzzello, F. ^{[1, 2]} ; Agodi, C. ^[1] ; Carbone, D. ^[1] ; Cavallaro, M. ^[1] ; Lubian, J. ^[3] ; Acosta, L. ^[4] ; Amador-Valenzuela, P. ^[5] ; Borello-Lewin, T. ^[6] ; Brischetto, G. A. ^{[1, 2]} ; Calabrese, S. ^{[1, 2]} ; Calvo, D. ^[7] ; Capirossi, V ^{[7, 8]} ; Chavez Lomeli, E. R. ^[4] ; Ciraldo, I ^{[1, 2]} ; Cutuli, M. ^{[1, 2]} ; Delaunay, F. ^{[7, 8, 9]} ; Djapo, H. ^[10] ; Eke, C. ^[11] ; Finocchiaro, P. ^[1] ; Firat, S. ^[12] ; Fisichella, M. ^[7] ; Foti, A. ^[13] ; Guazzelli, M. A. ^[14] ; Hacisalihoglu, A. ^{[1, 15]} ; Iazzi, F. ^{[7, 8]} ; Linares, R. ^[3] ; Ma, J. ^[16] ; Medina, N. H. ^[6] ; Moralles, M. ^[17] ; Oliveira, J. R. B. ^[6] ; Pakou, A. ^{[18, 19]} ; Pandola, L. ^[1] ; Petrascu, H. ^[20] ; Pinna, F. ^{[7, 8]} ; Ries, P. C. ^[21] ; Russo, G. ^{[13, 2]} ; Sgouros, O. ^[1] ; Solakci, S. O. ^[12] ; Soukeras, V ^[1] ; Souliotis, G. ^{[22, 23]} ; Torresi, D. ^[1] ; Tudisco, S. ^[1] ; Wang, J. ^{[16, 24]} ; Yang, Y. ^[16] ; Yildirin, A. ^[12] ; Zagatto, V. A. B. ^[3] ; Collaboration, NUMEN

Afiliação do(s) autor(es):Mostrar menos -

^[1] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95123 Catania - Italy

^[2] Univ Catania, Dipartimento Fis & Astron Ettore Majorana, I-95123 Catania - Italy

^[3] Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ - Brazil

^[4] Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF - Mexico

^[5] Inst Nacl Invest Nucl, Ocoyoacac 52750 - Mexico

^[6] Univ Sao Paulo, Inst Fis, BR-05508060 Sao Paulo - Brazil

^[7] Ist Nazl Fis Nucl, Sez Torino, I-10124 Turin - Italy

^[8] Politecn Torino, Dipartimento Sci Applicata & Tecnol, I-10129 Turin - Italy

^[9] Normandie Univ, Lab Phys Corpusculaire Caen, ENSICAEN, UNICAEN, CNRS, IN2P3, F-14000 Caen - France

^[10] Ankara Univ, Inst Accelerator Technol, TR-06100 Ankara - Turkey

^[11] Akdeniz Univ, Dept Math & Sci Educ, TR-07058 Antalya - Turkey

^[12] Akdeniz Univ, Dept Phys, TR-07070 Antalya - Turkey

^[13] Ist Nazl Fis Nucl, Sez Catania, I-95123 Catania - Italy

^[14] Ctr Univ FEI, BR-09850305 Sao Bernardo Do Campo - Brazil

^[15] Karadeniz Tech Univ, Inst Nat Sci, TR-61080 Trabzon - Turkey

^[16] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000 - Peoples R China

^[17] Inst Pesquisas Energet & Nucl IPEN CNEN, BR-05508000 Sao Paulo - Brazil

^[18] Univ Ioannina, Dept Phys, Ioannina 45110 - Greece

^[19] Hellen Inst Nucl Phys, Ioannina 45110 - Greece

^[20] Inst Natl Cercetare Dezvoltare Pentru Fiz & Ingn, Bucharest 077125 - Romania

^[21] Tech Univ Darmstadt, Inst Kemphys, D-64289 Darmstadt - Germany

^[22] Univ Athens, Dept Chem, Athens 15772 - Greece

^[23] Hellen Inst Nucl Phys, Athens 15772 - Greece

^[24] Huzhou Univ, Huzhou 313000, Zhejiang - Peoples R China

• Tipo de documento: Artigo Científico
• Fonte: Physical Review C; v. 104, n. 5 NOV 29 2021.
• Citações Web of Science: 0

Resumo

Background: An accurate description of the initial and final state interactions in the O-18 + Se-76 collision is demanded by the NUMEN project. The study of single and double charge exchange nuclear reactions is the main purpose for NUMEN, since these can be used as tools to provide experimentally driven information about nuclear matrix elements of interest in the context of neutrinoless double-beta decay. To date, the details of the optical potentials and nuclear response to isospin operators for many of the projectile-target systems proposed for the NUMEN double charge exchange studies are poorly known. The O-18 + Se-76 case, here under study, is particularly relevant due to its connection with the Ge-76 neutrinoless double-beta decay. Purpose: In this work the authors want to characterize the initial-state interaction for the O-1(8) + Se-76 reactions at 275 MeV incident energy determining the optical potential and evaluating the effect of couplings with the inelastic scattering on the elastic channel. Methods: The angular distributions of differential cross section were measured in the angular region between 4 degrees and 22 degrees in the center-of-mass reference frame. The cross sections were compared with theoretical calculations, that adopt different optical potentials. Coupling effects on the elastic channel were determined into the coupled channels formalism. Results: The excitation energy spectrum of the colliding nuclei and the cross section angular distributions were measured with satisfactory energy resolution. The elastic scattering cross section is not well reproduced in the full angular range explored when the optical model approach is adopted. A good agreement is found using coupled channel calculations. The initial state interaction for the O-18 + Se-76 nuclear reactions at 275 MeV is determined. Conclusions: Coupled channels effects are crucial to obtain a good description of the measured elastic and inelastic channels cross sections, even at large transferred momenta where the optical model approach fails in reproducing the experimental data. The role of channel coupling could be relevant also in the analysis of other open reaction channels in the same collision and should be accounted for in double charge exchange analyses as well. (AU)

• Processo FAPESP: 19/07767-1 - Reações nucleares com núcleos fracamente ligados ou com estrutura de cluster, radioativos e estáveis
• Beneficiário: Leandro Romero Gasques
• Modalidade de apoio: Auxílio à Pesquisa - Temático