%0 Journal Article %1 ISI:000414668700001 %A Vandebrouck, M. %A Lepailleur, A. %A Sorlin, O. %A Aumann, T. %A Caesar, C. %A Holl, M. %A Panin, V. %A Wamers, F. %A Stroberg, S. R. %A Holt, J. D. %A Santos, F. de Oliveira %A Alvarez-Pol, H. %A Atar, L. %A Avdeichikov, V. %A Beceiro-Novo, S. %A Bemmerer, D. %A Benlliure, J. %A Bertulani, C. A. %A Bogner, S. K. %A Boillos, J. M. %A Boretzky, K. %A Borge, M. J. G. %A Caamano, M. %A Casarejos, E. %A Catford, W. %A Cederkall, J. %A Chartier, M. %A Chulkov, L. %A Cortina-Gil, D. %A Cravo, E. %A Crespo, R. %A Pramanik, U. Datta %A Diaz Fernandez, P. %A Dillmann, I. %A Elekes, Z. %A Enders, J. %A Ershova, O. %A Estrade, A. %A Farinon, F. %A Fraile, L. M. %A Freer, M. %A Galaviz, D. %A Geissel, H. %A Gernhaeuser, R. %A Gibelin, J. %A Golubev, P. %A Goebel, K. %A Hagdahl, J. %A Heftrich, T. %A Heil, M. %A Heine, M. %A Heinz, A. %A Henriques, A. %A Hergert, H. %A Hufnagel, A. %A Ignatov, A. %A Johansson, H. T. %A Jonson, B. %A Kahlbow, J. %A Kalantar-Nayestanaki, N. %A Kanungo, R. %A Kelic-Heil, A. %A Knyazev, A. %A Kroll, T. %A Kurz, N. %A Labiche, M. %A Langer, C. %A Le Bleis, T. %A Lemmon, R. %A Lindberg, S. %A Machado, J. %A Marganiec, J. %A Marques, F. M. %A Movsesyan, A. %A Nacher, E. %A Najafi, M. %A Nikolskii, E. %A Nilsson, T. %A Nociforo, C. %A Paschalis, S. %A Perea, A. %A Petri, M. %A Pietri, S. %A Plag, R. %A Reifarth, R. %A Ribeiro, G. %A Rigollet, C. %A Roeder, M. %A Rossi, D. %A Savran, D. %A Scheit, H. %A Schwenk, A. %A Simon, H. %A Syndikus, I. %A Taylor, J. T. %A Tengblad, O. %A Thies, R. %A Togano, Y. %A Velho, P. %A Volkov, V. %A Wagner, A. %A Weick, H. %A Wheldon, C. %A Wilson, G. %A Winfield, J. S. %A Woods, P. %A Yakorev, D. %A Zhukov, M. %A Zilges, A. %A Zuber, K. %A Collaboration, R3B %D 2017 %J Phys. Rev. C %K imported myown zilges %N 5 %R 10.1103/PhysRevC.96.054305 %T Effective proton-neutron interaction near the drip line from unbound states in F-25,F-26 %V 96 %X Background: Odd-odd nuclei, around doubly closed shells, have been extensively used to study proton-neutron interactions. However, the evolution of these interactions as a function of the binding energy, ultimately when nuclei become unbound, is poorly known. The F-26 nucleus, composed of a deeply bound pi 0d(5/2) proton and an unbound v0d(3/2) neutron on top of an O-24 core, is particularly adapted for this purpose. The coupling of this proton and neutron results in a J(pi) = 1(1)(+) - 4(1)(+) multiplet, whose energies must be determined to study the influence of the proximity of the continuum on the corresponding proton-neutron interaction. The J(pi) = 1(1)(+), 2(1)(+), 4(1)(+) bound states have been determined, and only a clear identification of the J(pi) = 3(1)(+) is missing. Purpose: We wish to complete the study of the J(pi) = 1(1)(+) - 4(1)(+) multiplet in F-26, by studying the energy and width of the J(pi) = 3(1)(+) unbound state. The method was first validated by the study of unbound states in F-25, for which resonances were already observed in a previous experiment. Method: Radioactive beams of Ne-26 and Ne-27, produced at about 440AMeV by the fragment separator at the GSI facility were used to populate unbound states in F-25 and F-26 via one-proton knockout reactions on a CH2 target, located at the object focal point of the (RB)-B-3/LAND setup. The detection of emitted. rays and neutrons, added to the reconstruction of the momentum vector of the A - 1 nuclei, allowed the determination of the energy of three unbound states in F-25 and two in F-26. Results: Based on its width and decay properties, the first unbound state in F-25, at the relative energy of 49(9) keV, is proposed to be a J(pi) = 1/ 2(-) arising from a p1/2 proton- hole state. In F-26, the first resonance at 323(33) keV is proposed to be the J(pi) = 3(1)(+) member of the J(pi) = 1(1)(+) - 4(1)(+) multiplet. Energies of observed states in F-25,F-26 have been compared to calculations using the independent-particle shell model, a phenomenological shell model, and the ab initio valence-space in-medium similarity renormalization group method. Conclusions: The deduced effective proton- neutron interaction is weakened by about 30-40\% in comparison to the models, pointing to the need for implementing the role of the continuum in theoretical descriptions or to a wrong determination of the atomic mass of F-26.

@article{ISI:000414668700001, abstract = {Background: Odd-odd nuclei, around doubly closed shells, have been extensively used to study proton-neutron interactions. However, the evolution of these interactions as a function of the binding energy, ultimately when nuclei become unbound, is poorly known. The F-26 nucleus, composed of a deeply bound pi 0d(5/2) proton and an unbound v0d(3/2) neutron on top of an O-24 core, is particularly adapted for this purpose. The coupling of this proton and neutron results in a J(pi) = 1(1)(+) - 4(1)(+) multiplet, whose energies must be determined to study the influence of the proximity of the continuum on the corresponding proton-neutron interaction. The J(pi) = 1(1)(+), 2(1)(+), 4(1)(+) bound states have been determined, and only a clear identification of the J(pi) = 3(1)(+) is missing. Purpose: We wish to complete the study of the J(pi) = 1(1)(+) - 4(1)(+) multiplet in F-26, by studying the energy and width of the J(pi) = 3(1)(+) unbound state. The method was first validated by the study of unbound states in F-25, for which resonances were already observed in a previous experiment. Method: Radioactive beams of Ne-26 and Ne-27, produced at about 440AMeV by the fragment separator at the GSI facility were used to populate unbound states in F-25 and F-26 via one-proton knockout reactions on a CH2 target, located at the object focal point of the (RB)-B-3/LAND setup. The detection of emitted. rays and neutrons, added to the reconstruction of the momentum vector of the A - 1 nuclei, allowed the determination of the energy of three unbound states in F-25 and two in F-26. Results: Based on its width and decay properties, the first unbound state in F-25, at the relative energy of 49(9) keV, is proposed to be a J(pi) = 1/ 2(-) arising from a p1/2 proton- hole state. In F-26, the first resonance at 323(33) keV is proposed to be the J(pi) = 3(1)(+) member of the J(pi) = 1(1)(+) - 4(1)(+) multiplet. Energies of observed states in F-25,F-26 have been compared to calculations using the independent-particle shell model, a phenomenological shell model, and the ab initio valence-space in-medium similarity renormalization group method. Conclusions: The deduced effective proton- neutron interaction is weakened by about 30-40\% in comparison to the models, pointing to the need for implementing the role of the continuum in theoretical descriptions or to a wrong determination of the atomic mass of F-26.}, added-at = {2019-11-20T10:09:48.000+0100}, article-number = {054305}, author = {Vandebrouck, M. and Lepailleur, A. and Sorlin, O. and Aumann, T. and Caesar, C. and Holl, M. and Panin, V. and Wamers, F. and Stroberg, S. R. and Holt, J. D. and Santos, F. de Oliveira and Alvarez-Pol, H. and Atar, L. and Avdeichikov, V. and Beceiro-Novo, S. and Bemmerer, D. and Benlliure, J. and Bertulani, C. A. and Bogner, S. K. and Boillos, J. M. and Boretzky, K. and Borge, M. J. G. and Caamano, M. and Casarejos, E. and Catford, W. and Cederkall, J. and Chartier, M. and Chulkov, L. and Cortina-Gil, D. and Cravo, E. and Crespo, R. and Pramanik, U. Datta and Diaz Fernandez, P. and Dillmann, I. and Elekes, Z. and Enders, J. and Ershova, O. and Estrade, A. and Farinon, F. and Fraile, L. M. and Freer, M. and Galaviz, D. and Geissel, H. and Gernhaeuser, R. and Gibelin, J. and Golubev, P. and Goebel, K. and Hagdahl, J. and Heftrich, T. and Heil, M. and Heine, M. and Heinz, A. and Henriques, A. and Hergert, H. and Hufnagel, A. and Ignatov, A. and Johansson, H. T. and Jonson, B. and Kahlbow, J. and Kalantar-Nayestanaki, N. and Kanungo, R. and Kelic-Heil, A. and Knyazev, A. and Kroll, T. and Kurz, N. and Labiche, M. and Langer, C. and Le Bleis, T. and Lemmon, R. and Lindberg, S. and Machado, J. and Marganiec, J. and Marques, F. M. and Movsesyan, A. and Nacher, E. and Najafi, M. and Nikolskii, E. and Nilsson, T. and Nociforo, C. and Paschalis, S. and Perea, A. and Petri, M. and Pietri, S. and Plag, R. and Reifarth, R. and Ribeiro, G. and Rigollet, C. and Roeder, M. and Rossi, D. and Savran, D. and Scheit, H. and Schwenk, A. and Simon, H. and Syndikus, I. and Taylor, J. T. and Tengblad, O. and Thies, R. and Togano, Y. and Velho, P. and Volkov, V. and Wagner, A. and Weick, H. and Wheldon, C. and Wilson, G. and Winfield, J. S. and Woods, P. and Yakorev, D. and Zhukov, M. and Zilges, A. and Zuber, K. and Collaboration, R3B}, biburl = {https://www.bibsonomy.org/bibtex/210b6c32c017802d212a2cc71d7da4b1c/ikpcologne}, doi = {10.1103/PhysRevC.96.054305}, eissn = {2469-9993}, interhash = {e28ec3c80a55723d3a83d078c5531ae0}, intrahash = {10b6c32c017802d212a2cc71d7da4b1c}, issn = {2469-9985}, journal = {Phys. Rev. C}, keywords = {imported myown zilges}, month = {NOV 8}, number = 5, orcid-numbers = {Hergert, Heiko/0000-0003-0520-0856 Nilsson, Thomas/0000-0002-6990-947X Cortina-Gil, Dolores DC/0000-0001-7672-9912 caamano, manuel/0000-0002-5045-003X Galaviz, Daniel/0000-0003-2992-4496 Machado, Jorge/0000-0002-0383-4882 Volkov, Vasily/0000-0002-3693-0133 Rossi, Dominic/0000-0002-2461-0618 Bemmerer, Daniel/0000-0003-0470-8367 Gil, Dolores Cortina/0000-0001-7672-9912 Pol, Hector Alvarez/0000-0001-9643-6252 Petri, Marina/0000-0002-3740-6106 Wagner, Andreas/0000-0001-7575-3961 Enders, Joachim/0000-0002-8441-378X Paschalis, Stefanos/0000-0002-9113-3778 Chartier, Marielle/0000-0003-0578-5567 Fraile, Luis M/0000-0002-6281-3635 Benlliure, Jose/0000-0002-5114-1298 Scheit, Heiko/0000-0002-8937-1101 Zoltan, Elekes/0000-0003-0571-8719 Datta, Ushasi/0000-0001-8192-1407 Panin, Valerii/0000-0003-3551-5058 Tengblad, Olof/0000-0002-5813-0022 Johansson, Hakan T/0000-0001-7978-8336 Nacher, Enrique/0000-0002-2123-539X de oliveira Santos, Francois/0000-0003-4539-5985 Atar, Leyla/0000-0001-6919-8869 crespo, raquel/0000-0001-7338-0014 Jonson, Bjorn/0000-0002-9697-9115 Dillmann, Iris/0000-0001-8521-3635 Caesar, Christoph/0000-0001-5844-7073}, researcherid-numbers = {Hergert, Heiko/G-9597-2016 Heinz, Andreas/E-3191-2014 Nilsson, Thomas/B-7705-2009 Cortina-Gil, Dolores DC/H-9626-2015 caamano, manuel/A-1832-2013 Galaviz, Daniel/A-7325-2008 Simon, Haik/G-2898-2018 Machado, Jorge/H-6321-2014 Volkov, Vasily/G-2202-2018 Rossi, Dominic/B-4728-2011 Bemmerer, Daniel/C-9092-2013 Gernhauser, Roman/AAE-6699-2019 Gil, Dolores Cortina/O-9874-2019 Pol, Hector Alvarez/F-1930-2011 Petri, Marina/H-4630-2016 Wagner, Andreas/G-3127-2013 Enders, Joachim/B-5501-2009 Paschalis, Stefanos/H-8758-2016 Chartier, Marielle/F-4055-2018 Fraile, Luis M/B-8668-2011 Benlliure, Jose/K-8407-2014 Scheit, Heiko/B-4779-2008 Zoltan, Elekes/N-5744-2019 Datta, Ushasi/B-9032-2015 Panin, Valerii/B-7197-2019 Tengblad, Olof/O-5852-2015 Johansson, Hakan T/E-2685-2014 Nacher, Enrique/G-2257-2010 Aumann, Thomas/B-1455-2012 crespo, raquel/M-9714-2016}, timestamp = {2019-11-20T10:09:48.000+0100}, title = {Effective proton-neutron interaction near the drip line from unbound states in F-25,F-26}, unique-id = {ISI:000414668700001}, volume = 96, year = 2017 }