Shell Evolution towards Ni 78: Low-Lying States in Cu 77

E. Sahin; F. L. Bello Garrote; Y. Tsunoda; T. Otsuka; G. De Angelis; A. Görgen; M. Niikura; S. Nishimura; Z. Y. Xu; H. Baba; F. Browne; M. C. Delattre; P. Doornenbal; S. Franchoo; G. Gey; K. Hadyńska-Klk; T. Isobe; P. R. John; H. S. Jung; I. Kojouharov; T. Kubo; N. Kurz; Z. Li; G. Lorusso; I. Matea; K. Matsui; D. Mengoni; P. Morfouace; D. R. Napoli; F. Naqvi; H. Nishibata; A. Odahara; H. Sakurai; H. Schaffner; P. A. Söderström; D. Sohler; I. G. Stefan; T. Sumikama; D. Suzuki; R. Taniuchi; J. Taprogge; Z. Vajta; H. Watanabe; V. Werner; J. Wu; A. Yagi; M. Yalcinkaya; K. Yoshinaga

doi:10.1103/PhysRevLett.118.242502

Shell Evolution towards Ni 78: Low-Lying States in Cu 77

E. Sahin, F. L. Bello Garrote, Y. Tsunoda, T. Otsuka, G. De Angelis, A. Görgen, M. Niikura, S. Nishimura, Z. Y. Xu, H. Baba, F. Browne, M. C. Delattre, P. Doornenbal, S. Franchoo, G. Gey, K. Hadyńska-Klk, T. Isobe, P. R. John, H. S. Jung, I. KojouharovT. Kubo, N. Kurz, Z. Li, G. Lorusso, I. Matea, K. Matsui, D. Mengoni, P. Morfouace, D. R. Napoli, F. Naqvi, H. Nishibata, A. Odahara, H. Sakurai, H. Schaffner, P. A. Söderström, D. Sohler, I. G. Stefan, T. Sumikama, D. Suzuki, R. Taniuchi, J. Taprogge, Z. Vajta, H. Watanabe, V. Werner, J. Wu, A. Yagi, M. Yalcinkaya, K. Yoshinaga

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Abstract

The level structure of the neutron-rich Cu77 nucleus is investigated through β-delayed γ-ray spectroscopy at the Radioactive Isotope Beam Factory of the RIKEN Nishina Center. Ions of Ni77 are produced by in-flight fission, separated and identified in the BigRIPS fragment separator, and implanted in the WAS3ABi silicon detector array, surrounded by Ge cluster detectors of the EURICA array. A large number of excited states in Cu77 are identified for the first time by correlating γ rays with the β decay of Ni77, and a level scheme is constructed by utilizing their coincidence relationships. The good agreement between large-scale Monte Carlo shell model calculations and experimental results allows for the evaluation of the single-particle structure near Ni78 and suggests a single-particle nature for both the 5/21- and 3/21- states in Cu77, leading to doubly magic Ni78.

Original language	English
Article number	242502
Journal	Physical review letters
Volume	118
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevLett.118.242502
Publication status	Published - Jun 16 2017
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1103/PhysRevLett.118.242502

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Sahin, E., Bello Garrote, F. L., Tsunoda, Y., Otsuka, T., De Angelis, G., Görgen, A., Niikura, M., Nishimura, S., Xu, Z. Y., Baba, H., Browne, F., Delattre, M. C., Doornenbal, P., Franchoo, S., Gey, G., Hadyńska-Klk, K., Isobe, T., John, P. R., Jung, H. S., ... Yoshinaga, K. (2017). Shell Evolution towards Ni 78: Low-Lying States in Cu 77. Physical review letters, 118(24), [242502]. https://doi.org/10.1103/PhysRevLett.118.242502

Sahin, E, Bello Garrote, FL, Tsunoda, Y, Otsuka, T, De Angelis, G, Görgen, A, Niikura, M, Nishimura, S, Xu, ZY, Baba, H, Browne, F, Delattre, MC, Doornenbal, P, Franchoo, S, Gey, G, Hadyńska-Klk, K, Isobe, T, John, PR, Jung, HS, Kojouharov, I, Kubo, T, Kurz, N, Li, Z, Lorusso, G, Matea, I, Matsui, K, Mengoni, D, Morfouace, P, Napoli, DR, Naqvi, F, Nishibata, H, Odahara, A, Sakurai, H, Schaffner, H, Söderström, PA, Sohler, D, Stefan, IG, Sumikama, T, Suzuki, D, Taniuchi, R, Taprogge, J, Vajta, Z, Watanabe, H, Werner, V, Wu, J, Yagi, A, Yalcinkaya, M & Yoshinaga, K 2017, 'Shell Evolution towards Ni 78: Low-Lying States in Cu 77', Physical review letters, vol. 118, no. 24, 242502. https://doi.org/10.1103/PhysRevLett.118.242502

@article{c1db7b495be942e3a7931fc46a4bd66f,

title = "Shell Evolution towards Ni 78: Low-Lying States in Cu 77",

abstract = "The level structure of the neutron-rich Cu77 nucleus is investigated through β-delayed γ-ray spectroscopy at the Radioactive Isotope Beam Factory of the RIKEN Nishina Center. Ions of Ni77 are produced by in-flight fission, separated and identified in the BigRIPS fragment separator, and implanted in the WAS3ABi silicon detector array, surrounded by Ge cluster detectors of the EURICA array. A large number of excited states in Cu77 are identified for the first time by correlating γ rays with the β decay of Ni77, and a level scheme is constructed by utilizing their coincidence relationships. The good agreement between large-scale Monte Carlo shell model calculations and experimental results allows for the evaluation of the single-particle structure near Ni78 and suggests a single-particle nature for both the 5/21- and 3/21- states in Cu77, leading to doubly magic Ni78.",

author = "E. Sahin and {Bello Garrote}, {F. L.} and Y. Tsunoda and T. Otsuka and {De Angelis}, G. and A. G{\"o}rgen and M. Niikura and S. Nishimura and Xu, {Z. Y.} and H. Baba and F. Browne and Delattre, {M. C.} and P. Doornenbal and S. Franchoo and G. Gey and K. Hady{\'n}ska-Klk and T. Isobe and John, {P. R.} and Jung, {H. S.} and I. Kojouharov and T. Kubo and N. Kurz and Z. Li and G. Lorusso and I. Matea and K. Matsui and D. Mengoni and P. Morfouace and Napoli, {D. R.} and F. Naqvi and H. Nishibata and A. Odahara and H. Sakurai and H. Schaffner and S{\"o}derstr{\"o}m, {P. A.} and D. Sohler and Stefan, {I. G.} and T. Sumikama and D. Suzuki and R. Taniuchi and J. Taprogge and Z. Vajta and H. Watanabe and V. Werner and J. Wu and A. Yagi and M. Yalcinkaya and K. Yoshinaga",

note = "Funding Information: This work was carried out at the RIBF operated by RIKEN Nishina Center, RIKEN and CNS, University of Tokyo. The research leading to the results has received funding from the Research Council of Norway under Project Grants No.240104 and No.213442 and from KAKENHI (under Grants No.25247045, No.23.01752, and No.25800130); U.S. DOE Grant No.DE-FG02-91ER-40609; Spanish Ministerio de Ciencia e Innovacin Contracts No.FPA2009-13377C02 and No.FPA2011-29854-C04; and the Hungarian Scientific Research Fund OTKA Contract No.K100835. The MonteCarlo shell model calculations were performed on the K computer at RIKEN AICS (hp140210, hp150224, and hp160211). This work was supported in part by the HPCI Strategic Program (The Origin of Matter and the Universe), by Priority Issue on Post-K computer (Elucidation of the Fundamental Laws and Evolution of the Universe; hp160211), and by CNS-RIKEN joint project for large-scale nuclear structure calculations. Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

month = jun,

day = "16",

doi = "10.1103/PhysRevLett.118.242502",

language = "English",

volume = "118",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "24",

}

TY - JOUR

T1 - Shell Evolution towards Ni 78

T2 - Low-Lying States in Cu 77

AU - Sahin, E.

AU - Bello Garrote, F. L.

AU - Tsunoda, Y.

AU - Otsuka, T.

AU - De Angelis, G.

AU - Görgen, A.

AU - Niikura, M.

AU - Nishimura, S.

AU - Xu, Z. Y.

AU - Baba, H.

AU - Browne, F.

AU - Delattre, M. C.

AU - Doornenbal, P.

AU - Franchoo, S.

AU - Gey, G.

AU - Hadyńska-Klk, K.

AU - Isobe, T.

AU - John, P. R.

AU - Jung, H. S.

AU - Kojouharov, I.

AU - Kubo, T.

AU - Kurz, N.

AU - Li, Z.

AU - Lorusso, G.

AU - Matea, I.

AU - Matsui, K.

AU - Mengoni, D.

AU - Morfouace, P.

AU - Napoli, D. R.

AU - Naqvi, F.

AU - Nishibata, H.

AU - Odahara, A.

AU - Sakurai, H.

AU - Schaffner, H.

AU - Söderström, P. A.

AU - Sohler, D.

AU - Stefan, I. G.

AU - Sumikama, T.

AU - Suzuki, D.

AU - Taniuchi, R.

AU - Taprogge, J.

AU - Vajta, Z.

AU - Watanabe, H.

AU - Werner, V.

AU - Wu, J.

AU - Yagi, A.

AU - Yalcinkaya, M.

AU - Yoshinaga, K.

N1 - Funding Information: This work was carried out at the RIBF operated by RIKEN Nishina Center, RIKEN and CNS, University of Tokyo. The research leading to the results has received funding from the Research Council of Norway under Project Grants No.240104 and No.213442 and from KAKENHI (under Grants No.25247045, No.23.01752, and No.25800130); U.S. DOE Grant No.DE-FG02-91ER-40609; Spanish Ministerio de Ciencia e Innovacin Contracts No.FPA2009-13377C02 and No.FPA2011-29854-C04; and the Hungarian Scientific Research Fund OTKA Contract No.K100835. The MonteCarlo shell model calculations were performed on the K computer at RIKEN AICS (hp140210, hp150224, and hp160211). This work was supported in part by the HPCI Strategic Program (The Origin of Matter and the Universe), by Priority Issue on Post-K computer (Elucidation of the Fundamental Laws and Evolution of the Universe; hp160211), and by CNS-RIKEN joint project for large-scale nuclear structure calculations. Publisher Copyright: © 2017 American Physical Society.

PY - 2017/6/16

Y1 - 2017/6/16

N2 - The level structure of the neutron-rich Cu77 nucleus is investigated through β-delayed γ-ray spectroscopy at the Radioactive Isotope Beam Factory of the RIKEN Nishina Center. Ions of Ni77 are produced by in-flight fission, separated and identified in the BigRIPS fragment separator, and implanted in the WAS3ABi silicon detector array, surrounded by Ge cluster detectors of the EURICA array. A large number of excited states in Cu77 are identified for the first time by correlating γ rays with the β decay of Ni77, and a level scheme is constructed by utilizing their coincidence relationships. The good agreement between large-scale Monte Carlo shell model calculations and experimental results allows for the evaluation of the single-particle structure near Ni78 and suggests a single-particle nature for both the 5/21- and 3/21- states in Cu77, leading to doubly magic Ni78.

AB - The level structure of the neutron-rich Cu77 nucleus is investigated through β-delayed γ-ray spectroscopy at the Radioactive Isotope Beam Factory of the RIKEN Nishina Center. Ions of Ni77 are produced by in-flight fission, separated and identified in the BigRIPS fragment separator, and implanted in the WAS3ABi silicon detector array, surrounded by Ge cluster detectors of the EURICA array. A large number of excited states in Cu77 are identified for the first time by correlating γ rays with the β decay of Ni77, and a level scheme is constructed by utilizing their coincidence relationships. The good agreement between large-scale Monte Carlo shell model calculations and experimental results allows for the evaluation of the single-particle structure near Ni78 and suggests a single-particle nature for both the 5/21- and 3/21- states in Cu77, leading to doubly magic Ni78.

UR - http://www.scopus.com/inward/record.url?scp=85020548396&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85020548396&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.118.242502

DO - 10.1103/PhysRevLett.118.242502

M3 - Article

C2 - 28665637

AN - SCOPUS:85020548396

SN - 0031-9007

VL - 118

JO - Physical Review Letters

JF - Physical Review Letters

IS - 24

M1 - 242502

ER -

Shell Evolution towards Ni 78: Low-Lying States in Cu 77

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