Studies of continuum states in 16 Ne using three-body correlation techniques

Autor: K. Sümmerer, O. Ershova, Deniz Savran, J. V. Kratz, L. M. Fraile, H. O. U. Fynbo, Olof Tengblad, Herbert A. Simon, S. Beceiro-Novo, Rene Reifarth, O.A. Kiselev, J. Hoffmann, Stefanos Paschalis, Ángel Perea, Achim Richter, Marielle Chartier, D. H. H. Hoffmann, Yu. A. Litvinov, C. Langer, Helmut Weick, Roy Crawford Lemmon, C. Wimmer, C. Karagiannis, H. Emling, Håkan T Johansson, Mattias Lantz, Mikhail V. Zhukov, Björn Jonson, Joachim Stroth, Ralf Plag, Thomas Nilsson, G. Schrieder, A. Chatillon, Matthias Heil, Wolfgang Ott, N. Kurz, Y. Aksyutina, K. Boretzky, F. Aksouh, F. Wamers, J. Marganiec, María José García Borge, D. Galaviz, L. V. Chulkov, K. Riisager, C. Rodriguez-Tajes, V. Panin, H. Alvarez-Pol, T. Le Bleis, K. Mahata, Göran Hugo Nyman, D. Cortina-Gil, C. Müntz, Hans Geissel, C. Nociforo, Michael Wiescher, R. Kulessa, D. M. Rossi, Thomas Aumann
Přispěvatelé: Ministerio de Economía y Competitividad (España), Ministerio de Ciencia e Innovación (España), Swedish Research Council, Nuclear Astrophysics Virtual Institute (Germany), Helmholtz Centre for Heavy Ion Research, Federal Ministry of Education and Research (Germany), Helmholtz International Center for FAIR, European Commission
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Zdroj: Marganiec, J, Wamers, F, Aksouh, F, Aksyutina, Y, Álvarez-Pol, H, Aumann, T, Beceiro-Novo, S, Boretzky, K, Borge, M J G, Chartier, M, Chatillon, A, Chulkov, L V, Cortina-Gil, D, Emling, H, Ershova, O, Fraile, L M, Fynbo, H O U, Galaviz, D, Geissel, H, Heil, M, Hoffmann, D H H, Hoffmann, J, Johansson, H T, Jonson, B, Karagiannis, C, Kiselev, O A, Kratz, J V, Kulessa, R, Kurz, N, Langer, C, Lantz, M, Le Bleis, T, Lemmon, R, Litvinov, Y A, Mahata, K, Müntz, C, Nilsson, T, Nociforo, C, Nyman, G, Ott, W, Panin, V, Paschalis, S, Perea, A, Plag, R, Reifarth, R, Richter, A, Rodriguez-Tajes, C, Rossi, D, Riisager, K, Savran, D, Schrieder, G, Simon, H, Stroth, J, Sümmerer, K, Tengblad, O, Weick, H, Wiescher, M, Wimmer, C & Zhukov, M V 2015, ' Studies of continuum states in 16 Ne using three-body correlation techniques ', The European Physical Journal A: Hadrons and Nuclei, vol. 51, no. 1, pp. 1-9 . https://doi.org/10.1140/epja/i2015-15009-0
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DOI: 10.1140/epja/i2015-15009-0
Popis: J. Marganiec et al.; 9 pags.; 11 figs.; 2 tabs.
© 2015, SIF, Springer-Verlag Berlin Heidelberg. Two-proton decay of the unbound Tz = -2 nucleus 16Ne , produced in one-neutron knockout from a 500 MeV/u 17Ne beam, has been studied at GSI. The ground state, at a resonance energy 1.388(15) MeV, (Γ = 0.082(15) MeV) above the 14O +p+p threshold, and two narrow resonances at Er = 3.220(46) MeV and 7.57(6) MeV have been investigated. A comparison of the energy difference between the first excited 2+ state and the 0+ ground state in 16Ne with its mirror nucleus 16C reveals a small Thomas-Ehrman shift (TES) of +70(46) keV. A trend of the TES for the T = 2 quintet is obtained by completing the known data with a prediction for 16F obtained from an IMME analysis. The decay mechanisms of the observed three resonances were revealed from an analysis of the energy and angular correlations of the 14O +p+p decay products. The ground state decay can be considered as a genuine three-body (democratic) mode and the excited states decay sequentially via states in the intermediate nucleus 15F , the 3.22 MeV state predominantly via the 15F ground-state resonance, while the 7.57 MeV state decays via the 5/2+ resonance in 15F at 2.8 MeV above the 14O +p+p threshold. Further, from an analysis of angular correlations, the spin-parity of the 7.57 MeV state has been determined as IП = 2+ and assigned as the third 2+ state in 16Ne based on a comparison with 16C.
This work is partly supported by the Helmholtz International Center for FAIR within the framework of the LOEWE program launched by the State of Hesse, by the German Federal Ministry for Education and Research (BMBF), EU(EURONS), ExtreMe Matter Institute EMMI, GSI-TU Darmstadt cooperation, Nuclear Astrophysics Virtual Institutes NAVI. Financial support from the Swedish Research Council, the Spanish grants FPA-2010-17142, MICCIN FPA2009-14604-C02-01, FPA2012- 39404-C02-01and MINECO FPA 2012-32443 are also acknowledged. One of us (BJ) is a Helmholtz International Fellow
Databáze: OpenAIRE
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