Beyond the neutron drip line: The unbound oxygen isotopes 25O and 26O

C. Caesar; J. Simonis; T. Adachi; Y. Aksyutina; J. Alcantara; S. Altstadt; H. Alvarez-Pol; N. Ashwood; T. Aumann; V. Avdeichikov; M. Barr; S. Beceiro; D. Bemmerer; J. Benlliure; C. A. Bertulani; K. Boretzky; M. J.G. Borge; G. Burgunder; M. Caamano; E. Casarejos; W. Catford; J. Cederkäll; S. Chakraborty; M. Chartier; L. Chulkov; D. Cortina-Gil; U. Datta Pramanik; P. Diaz Fernandez; I. Dillmann; Z. Elekes; J. Enders; O. Ershova; A. Estrade; F. Farinon; L. M. Fraile; M. Freer; M. Freudenberger; H. O.U. Fynbo; D. Galaviz; H. Geissel; R. Gernhäuser; P. Golubev; D. Gonzalez Diaz; J. Hagdahl; T. Heftrich; M. Heil; M. Heine; A. Heinz; A. Henriques; M. Holl; J. D. Holt; G. Ickert; A. Ignatov; B. Jakobsson; H. T. Johansson; B. Jonson; N. Kalantar-Nayestanaki; R. Kanungo; A. Kelic-Heil; R. Knöbel; T. Kröll; R. Krücken; J. Kurcewicz; M. Labiche; C. Langer; T. Le Bleis; R. Lemmon; O. Lepyoshkina; S. Lindberg; J. Machado; J. Marganiec; V. Maroussov; J. Menéndez; M. Mostazo; A. Movsesyan; A. Najafi; T. Nilsson; C. Nociforo; V. Panin; A. Perea; S. Pietri; R. Plag; A. Prochazka; A. Rahaman; G. Rastrepina; R. Reifarth; G. Ribeiro; M. V. Ricciardi; C. Rigollet; K. Riisager; M. Röder; D. Rossi; J. Sanchez Del Rio; D. Savran; H. Scheit; A. Schwenk; H. Simon; O. Sorlin; V. Stoica; B. Streicher; J. Taylor; O. Tengblad; S. Terashima; R. Thies; Y. Togano; E. Uberseder; J. Van De Walle; P. Velho; V. Volkov; A. Wagner; F. Wamers; H. Weick; M. Weigand; C. Wheldon; G. Wilson; C. Wimmer; J. S. Winfield; P. Woods; D. Yakorev; M. V. Zhukov; A. Zilges; M. Zoric; K. Zuber

doi:10.1103/PhysRevC.88.034313

Beyond the neutron drip line: The unbound oxygen isotopes 25O and 26O

C. Caesar, J. Simonis, T. Adachi, Y. Aksyutina, J. Alcantara, S. Altstadt, H. Alvarez-Pol, N. Ashwood, T. Aumann, V. Avdeichikov, M. Barr, S. Beceiro, D. Bemmerer, J. Benlliure, C. A. Bertulani, K. Boretzky, M. J.G. Borge, G. Burgunder, M. Caamano, E. CasarejosW. Catford, J. Cederkäll, S. Chakraborty, M. Chartier, L. Chulkov, D. Cortina-Gil, U. Datta Pramanik, P. Diaz Fernandez, I. Dillmann, Z. Elekes, J. Enders, O. Ershova, A. Estrade, F. Farinon, L. M. Fraile, M. Freer, M. Freudenberger, H. O.U. Fynbo, D. Galaviz, H. Geissel, R. Gernhäuser, P. Golubev, D. Gonzalez Diaz, J. Hagdahl, T. Heftrich, M. Heil, M. Heine, A. Heinz, A. Henriques, M. Holl, J. D. Holt, G. Ickert, A. Ignatov, B. Jakobsson, H. T. Johansson, B. Jonson, N. Kalantar-Nayestanaki, R. Kanungo, A. Kelic-Heil, R. Knöbel, T. Kröll, R. Krücken, J. Kurcewicz, M. Labiche, C. Langer, T. Le Bleis, R. Lemmon, O. Lepyoshkina, S. Lindberg, J. Machado, J. Marganiec, V. Maroussov, J. Menéndez, M. Mostazo, A. Movsesyan, A. Najafi, T. Nilsson, C. Nociforo, V. Panin, A. Perea, S. Pietri, R. Plag, A. Prochazka, A. Rahaman, G. Rastrepina, R. Reifarth, G. Ribeiro, M. V. Ricciardi, C. Rigollet, K. Riisager, M. Röder, D. Rossi, J. Sanchez Del Rio, D. Savran, H. Scheit, A. Schwenk, H. Simon, O. Sorlin, V. Stoica, B. Streicher, J. Taylor, O. Tengblad, S. Terashima, R. Thies, Y. Togano, E. Uberseder, J. Van De Walle, P. Velho, V. Volkov, A. Wagner, F. Wamers, H. Weick, M. Weigand, C. Wheldon, G. Wilson, C. Wimmer, J. S. Winfield, P. Woods, D. Yakorev, M. V. Zhukov, A. Zilges, M. Zoric, K. Zuber

Research output: Contribution to journal › Article › peer-review

73 Citations (Scopus)

Abstract

The very neutron-rich oxygen isotopes 25O and 26O are investigated experimentally and theoretically. The unbound states are populated in an experiment performed at the R3B-LAND setup at GSI via proton-knockout reactions from 26F and 27F at relativistic energies around 442 and 414 MeV/nucleon, respectively. From the kinematically complete measurement of the decay into 24O plus one or two neutrons, the 25O ground-state energy and width are determined, and upper limits for the 26O ground-state energy and lifetime are extracted. In addition, the results provide indications for an excited state in 26O at around 4 MeV. The experimental findings are compared to theoretical shell-model calculations based on chiral two- and three-nucleon (3N) forces, including for the first time residual 3N forces, which are shown to be amplified as valence neutrons are added.

Original language	English
Article number	034313
Journal	Physical Review C - Nuclear Physics
Volume	88
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.88.034313
Publication status	Published - 2013 Sep 16

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.88.034313

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Caesar, C., Simonis, J., Adachi, T., Aksyutina, Y., Alcantara, J., Altstadt, S., Alvarez-Pol, H., Ashwood, N., Aumann, T., Avdeichikov, V., Barr, M., Beceiro, S., Bemmerer, D., Benlliure, J., Bertulani, C. A., Boretzky, K., Borge, M. J. G., Burgunder, G., Caamano, M., ... Zuber, K. (2013). Beyond the neutron drip line: The unbound oxygen isotopes 25O and 26O. Physical Review C - Nuclear Physics, 88(3), [034313]. https://doi.org/10.1103/PhysRevC.88.034313

Beyond the neutron drip line : The unbound oxygen isotopes 25O and 26O. / Caesar, C.; Simonis, J.; Adachi, T.; Aksyutina, Y.; Alcantara, J.; Altstadt, S.; Alvarez-Pol, H.; Ashwood, N.; Aumann, T.; Avdeichikov, V.; Barr, M.; Beceiro, S.; Bemmerer, D.; Benlliure, J.; Bertulani, C. A.; Boretzky, K.; Borge, M. J.G.; Burgunder, G.; Caamano, M.; Casarejos, E.; Catford, W.; Cederkäll, J.; Chakraborty, S.; Chartier, M.; Chulkov, L.; Cortina-Gil, D.; Datta Pramanik, U.; Diaz Fernandez, P.; Dillmann, I.; Elekes, Z.; Enders, J.; Ershova, O.; Estrade, A.; Farinon, F.; Fraile, L. M.; Freer, M.; Freudenberger, M.; Fynbo, H. O.U.; Galaviz, D.; Geissel, H.; Gernhäuser, R.; Golubev, P.; Gonzalez Diaz, D.; Hagdahl, J.; Heftrich, T.; Heil, M.; Heine, M.; Heinz, A.; Henriques, A.; Holl, M.; Holt, J. D.; Ickert, G.; Ignatov, A.; Jakobsson, B.; Johansson, H. T.; Jonson, B.; Kalantar-Nayestanaki, N.; Kanungo, R.; Kelic-Heil, A.; Knöbel, R.; Kröll, T.; Krücken, R.; Kurcewicz, J.; Labiche, M.; Langer, C.; Le Bleis, T.; Lemmon, R.; Lepyoshkina, O.; Lindberg, S.; Machado, J.; Marganiec, J.; Maroussov, V.; Menéndez, J.; Mostazo, M.; Movsesyan, A.; Najafi, A.; Nilsson, T.; Nociforo, C.; Panin, V.; Perea, A.; Pietri, S.; Plag, R.; Prochazka, A.; Rahaman, A.; Rastrepina, G.; Reifarth, R.; Ribeiro, G.; Ricciardi, M. V.; Rigollet, C.; Riisager, K.; Röder, M.; Rossi, D.; Sanchez Del Rio, J.; Savran, D.; Scheit, H.; Schwenk, A.; Simon, H.; Sorlin, O.; Stoica, V.; Streicher, B.; Taylor, J.; Tengblad, O.; Terashima, S.; Thies, R.; Togano, Y.; Uberseder, E.; Van De Walle, J.; Velho, P.; Volkov, V.; Wagner, A.; Wamers, F.; Weick, H.; Weigand, M.; Wheldon, C.; Wilson, G.; Wimmer, C.; Winfield, J. S.; Woods, P.; Yakorev, D.; Zhukov, M. V.; Zilges, A.; Zoric, M.; Zuber, K.

In: Physical Review C - Nuclear Physics, Vol. 88, No. 3, 034313, 16.09.2013.

Research output: Contribution to journal › Article › peer-review

Caesar, C, Simonis, J, Adachi, T, Aksyutina, Y, Alcantara, J, Altstadt, S, Alvarez-Pol, H, Ashwood, N, Aumann, T, Avdeichikov, V, Barr, M, Beceiro, S, Bemmerer, D, Benlliure, J, Bertulani, CA, Boretzky, K, Borge, MJG, Burgunder, G, Caamano, M, Casarejos, E, Catford, W, Cederkäll, J, Chakraborty, S, Chartier, M, Chulkov, L, Cortina-Gil, D, Datta Pramanik, U, Diaz Fernandez, P, Dillmann, I, Elekes, Z, Enders, J, Ershova, O, Estrade, A, Farinon, F, Fraile, LM, Freer, M, Freudenberger, M, Fynbo, HOU, Galaviz, D, Geissel, H, Gernhäuser, R, Golubev, P, Gonzalez Diaz, D, Hagdahl, J, Heftrich, T, Heil, M, Heine, M, Heinz, A, Henriques, A, Holl, M, Holt, JD, Ickert, G, Ignatov, A, Jakobsson, B, Johansson, HT, Jonson, B, Kalantar-Nayestanaki, N, Kanungo, R, Kelic-Heil, A, Knöbel, R, Kröll, T, Krücken, R, Kurcewicz, J, Labiche, M, Langer, C, Le Bleis, T, Lemmon, R, Lepyoshkina, O, Lindberg, S, Machado, J, Marganiec, J, Maroussov, V, Menéndez, J, Mostazo, M, Movsesyan, A, Najafi, A, Nilsson, T, Nociforo, C, Panin, V, Perea, A, Pietri, S, Plag, R, Prochazka, A, Rahaman, A, Rastrepina, G, Reifarth, R, Ribeiro, G, Ricciardi, MV, Rigollet, C, Riisager, K, Röder, M, Rossi, D, Sanchez Del Rio, J, Savran, D, Scheit, H, Schwenk, A, Simon, H, Sorlin, O, Stoica, V, Streicher, B, Taylor, J, Tengblad, O, Terashima, S, Thies, R, Togano, Y, Uberseder, E, Van De Walle, J, Velho, P, Volkov, V, Wagner, A, Wamers, F, Weick, H, Weigand, M, Wheldon, C, Wilson, G, Wimmer, C, Winfield, JS, Woods, P, Yakorev, D, Zhukov, MV, Zilges, A, Zoric, M & Zuber, K 2013, 'Beyond the neutron drip line: The unbound oxygen isotopes 25O and 26O', Physical Review C - Nuclear Physics, vol. 88, no. 3, 034313. https://doi.org/10.1103/PhysRevC.88.034313

Caesar, C. ; Simonis, J. ; Adachi, T. ; Aksyutina, Y. ; Alcantara, J. ; Altstadt, S. ; Alvarez-Pol, H. ; Ashwood, N. ; Aumann, T. ; Avdeichikov, V. ; Barr, M. ; Beceiro, S. ; Bemmerer, D. ; Benlliure, J. ; Bertulani, C. A. ; Boretzky, K. ; Borge, M. J.G. ; Burgunder, G. ; Caamano, M. ; Casarejos, E. ; Catford, W. ; Cederkäll, J. ; Chakraborty, S. ; Chartier, M. ; Chulkov, L. ; Cortina-Gil, D. ; Datta Pramanik, U. ; Diaz Fernandez, P. ; Dillmann, I. ; Elekes, Z. ; Enders, J. ; Ershova, O. ; Estrade, A. ; Farinon, F. ; Fraile, L. M. ; Freer, M. ; Freudenberger, M. ; Fynbo, H. O.U. ; Galaviz, D. ; Geissel, H. ; Gernhäuser, R. ; Golubev, P. ; Gonzalez Diaz, D. ; Hagdahl, J. ; Heftrich, T. ; Heil, M. ; Heine, M. ; Heinz, A. ; Henriques, A. ; Holl, M. ; Holt, J. D. ; Ickert, G. ; Ignatov, A. ; Jakobsson, B. ; Johansson, H. T. ; Jonson, B. ; Kalantar-Nayestanaki, N. ; Kanungo, R. ; Kelic-Heil, A. ; Knöbel, R. ; Kröll, T. ; Krücken, R. ; Kurcewicz, J. ; Labiche, M. ; Langer, C. ; Le Bleis, T. ; Lemmon, R. ; Lepyoshkina, O. ; Lindberg, S. ; Machado, J. ; Marganiec, J. ; Maroussov, V. ; Menéndez, J. ; Mostazo, M. ; Movsesyan, A. ; Najafi, A. ; Nilsson, T. ; Nociforo, C. ; Panin, V. ; Perea, A. ; Pietri, S. ; Plag, R. ; Prochazka, A. ; Rahaman, A. ; Rastrepina, G. ; Reifarth, R. ; Ribeiro, G. ; Ricciardi, M. V. ; Rigollet, C. ; Riisager, K. ; Röder, M. ; Rossi, D. ; Sanchez Del Rio, J. ; Savran, D. ; Scheit, H. ; Schwenk, A. ; Simon, H. ; Sorlin, O. ; Stoica, V. ; Streicher, B. ; Taylor, J. ; Tengblad, O. ; Terashima, S. ; Thies, R. ; Togano, Y. ; Uberseder, E. ; Van De Walle, J. ; Velho, P. ; Volkov, V. ; Wagner, A. ; Wamers, F. ; Weick, H. ; Weigand, M. ; Wheldon, C. ; Wilson, G. ; Wimmer, C. ; Winfield, J. S. ; Woods, P. ; Yakorev, D. ; Zhukov, M. V. ; Zilges, A. ; Zoric, M. ; Zuber, K. / Beyond the neutron drip line : The unbound oxygen isotopes 25O and 26O. In: Physical Review C - Nuclear Physics. 2013 ; Vol. 88, No. 3.

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title = "Beyond the neutron drip line: The unbound oxygen isotopes 25O and 26O",

abstract = "The very neutron-rich oxygen isotopes 25O and 26O are investigated experimentally and theoretically. The unbound states are populated in an experiment performed at the R3B-LAND setup at GSI via proton-knockout reactions from 26F and 27F at relativistic energies around 442 and 414 MeV/nucleon, respectively. From the kinematically complete measurement of the decay into 24O plus one or two neutrons, the 25O ground-state energy and width are determined, and upper limits for the 26O ground-state energy and lifetime are extracted. In addition, the results provide indications for an excited state in 26O at around 4 MeV. The experimental findings are compared to theoretical shell-model calculations based on chiral two- and three-nucleon (3N) forces, including for the first time residual 3N forces, which are shown to be amplified as valence neutrons are added.",

author = "C. Caesar and J. Simonis and T. Adachi and Y. Aksyutina and J. Alcantara and S. Altstadt and H. Alvarez-Pol and N. Ashwood and T. Aumann and V. Avdeichikov and M. Barr and S. Beceiro and D. Bemmerer and J. Benlliure and Bertulani, {C. A.} and K. Boretzky and Borge, {M. J.G.} and G. Burgunder and M. Caamano and E. Casarejos and W. Catford and J. Cederk{\"a}ll and S. Chakraborty and M. Chartier and L. Chulkov and D. Cortina-Gil and {Datta Pramanik}, U. and {Diaz Fernandez}, P. and I. Dillmann and Z. Elekes and J. Enders and O. Ershova and A. Estrade and F. Farinon and Fraile, {L. M.} and M. Freer and M. Freudenberger and Fynbo, {H. O.U.} and D. Galaviz and H. Geissel and R. Gernh{\"a}user and P. Golubev and {Gonzalez Diaz}, D. and J. Hagdahl and T. Heftrich and M. Heil and M. Heine and A. Heinz and A. Henriques and M. Holl and Holt, {J. D.} and G. Ickert and A. Ignatov and B. Jakobsson and Johansson, {H. T.} and B. Jonson and N. Kalantar-Nayestanaki and R. Kanungo and A. Kelic-Heil and R. Kn{\"o}bel and T. Kr{\"o}ll and R. Kr{\"u}cken and J. Kurcewicz and M. Labiche and C. Langer and {Le Bleis}, T. and R. Lemmon and O. Lepyoshkina and S. Lindberg and J. Machado and J. Marganiec and V. Maroussov and J. Men{\'e}ndez and M. Mostazo and A. Movsesyan and A. Najafi and T. Nilsson and C. Nociforo and V. Panin and A. Perea and S. Pietri and R. Plag and A. Prochazka and A. Rahaman and G. Rastrepina and R. Reifarth and G. Ribeiro and Ricciardi, {M. V.} and C. Rigollet and K. Riisager and M. R{\"o}der and D. Rossi and {Sanchez Del Rio}, J. and D. Savran and H. Scheit and A. Schwenk and H. Simon and O. Sorlin and V. Stoica and B. Streicher and J. Taylor and O. Tengblad and S. Terashima and R. Thies and Y. Togano and E. Uberseder and {Van De Walle}, J. and P. Velho and V. Volkov and A. Wagner and F. Wamers and H. Weick and M. Weigand and C. Wheldon and G. Wilson and C. Wimmer and Winfield, {J. S.} and P. Woods and D. Yakorev and Zhukov, {M. V.} and A. Zilges and M. Zoric and K. Zuber",

year = "2013",

month = sep,

day = "16",

doi = "10.1103/PhysRevC.88.034313",

language = "English",

volume = "88",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "3",

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TY - JOUR

T1 - Beyond the neutron drip line

T2 - The unbound oxygen isotopes 25O and 26O

AU - Caesar, C.

AU - Simonis, J.

AU - Adachi, T.

AU - Aksyutina, Y.

AU - Alcantara, J.

AU - Altstadt, S.

AU - Alvarez-Pol, H.

AU - Ashwood, N.

AU - Aumann, T.

AU - Avdeichikov, V.

AU - Barr, M.

AU - Beceiro, S.

AU - Bemmerer, D.

AU - Benlliure, J.

AU - Bertulani, C. A.

AU - Boretzky, K.

AU - Borge, M. J.G.

AU - Burgunder, G.

AU - Caamano, M.

AU - Casarejos, E.

AU - Catford, W.

AU - Cederkäll, J.

AU - Chakraborty, S.

AU - Chartier, M.

AU - Chulkov, L.

AU - Cortina-Gil, D.

AU - Datta Pramanik, U.

AU - Diaz Fernandez, P.

AU - Dillmann, I.

AU - Elekes, Z.

AU - Enders, J.

AU - Ershova, O.

AU - Estrade, A.

AU - Farinon, F.

AU - Fraile, L. M.

AU - Freer, M.

AU - Freudenberger, M.

AU - Fynbo, H. O.U.

AU - Galaviz, D.

AU - Geissel, H.

AU - Gernhäuser, R.

AU - Golubev, P.

AU - Gonzalez Diaz, D.

AU - Hagdahl, J.

AU - Heftrich, T.

AU - Heil, M.

AU - Heine, M.

AU - Heinz, A.

AU - Henriques, A.

AU - Holl, M.

AU - Holt, J. D.

AU - Ickert, G.

AU - Ignatov, A.

AU - Jakobsson, B.

AU - Johansson, H. T.

AU - Jonson, B.

AU - Kalantar-Nayestanaki, N.

AU - Kanungo, R.

AU - Kelic-Heil, A.

AU - Knöbel, R.

AU - Kröll, T.

AU - Krücken, R.

AU - Kurcewicz, J.

AU - Labiche, M.

AU - Langer, C.

AU - Le Bleis, T.

AU - Lemmon, R.

AU - Lepyoshkina, O.

AU - Lindberg, S.

AU - Machado, J.

AU - Marganiec, J.

AU - Maroussov, V.

AU - Menéndez, J.

AU - Mostazo, M.

AU - Movsesyan, A.

AU - Najafi, A.

AU - Nilsson, T.

AU - Nociforo, C.

AU - Panin, V.

AU - Perea, A.

AU - Pietri, S.

AU - Plag, R.

AU - Prochazka, A.

AU - Rahaman, A.

AU - Rastrepina, G.

AU - Reifarth, R.

AU - Ribeiro, G.

AU - Ricciardi, M. V.

AU - Rigollet, C.

AU - Riisager, K.

AU - Röder, M.

AU - Rossi, D.

AU - Sanchez Del Rio, J.

AU - Savran, D.

AU - Scheit, H.

AU - Schwenk, A.

AU - Simon, H.

AU - Sorlin, O.

AU - Stoica, V.

AU - Streicher, B.

AU - Taylor, J.

AU - Tengblad, O.

AU - Terashima, S.

AU - Thies, R.

AU - Togano, Y.

AU - Uberseder, E.

AU - Van De Walle, J.

AU - Velho, P.

AU - Volkov, V.

AU - Wagner, A.

AU - Wamers, F.

AU - Weick, H.

AU - Weigand, M.

AU - Wheldon, C.

AU - Wilson, G.

AU - Wimmer, C.

AU - Winfield, J. S.

AU - Woods, P.

AU - Yakorev, D.

AU - Zhukov, M. V.

AU - Zilges, A.

AU - Zoric, M.

AU - Zuber, K.

PY - 2013/9/16

Y1 - 2013/9/16

N2 - The very neutron-rich oxygen isotopes 25O and 26O are investigated experimentally and theoretically. The unbound states are populated in an experiment performed at the R3B-LAND setup at GSI via proton-knockout reactions from 26F and 27F at relativistic energies around 442 and 414 MeV/nucleon, respectively. From the kinematically complete measurement of the decay into 24O plus one or two neutrons, the 25O ground-state energy and width are determined, and upper limits for the 26O ground-state energy and lifetime are extracted. In addition, the results provide indications for an excited state in 26O at around 4 MeV. The experimental findings are compared to theoretical shell-model calculations based on chiral two- and three-nucleon (3N) forces, including for the first time residual 3N forces, which are shown to be amplified as valence neutrons are added.

AB - The very neutron-rich oxygen isotopes 25O and 26O are investigated experimentally and theoretically. The unbound states are populated in an experiment performed at the R3B-LAND setup at GSI via proton-knockout reactions from 26F and 27F at relativistic energies around 442 and 414 MeV/nucleon, respectively. From the kinematically complete measurement of the decay into 24O plus one or two neutrons, the 25O ground-state energy and width are determined, and upper limits for the 26O ground-state energy and lifetime are extracted. In addition, the results provide indications for an excited state in 26O at around 4 MeV. The experimental findings are compared to theoretical shell-model calculations based on chiral two- and three-nucleon (3N) forces, including for the first time residual 3N forces, which are shown to be amplified as valence neutrons are added.

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U2 - 10.1103/PhysRevC.88.034313

DO - 10.1103/PhysRevC.88.034313

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