Persistence of the Z=28 Shell Gap Around Ni 78: First Spectroscopy of Cu 79

L. Olivier; S. Franchoo; M. Niikura; Z. Vajta; D. Sohler; P. Doornenbal; A. Obertelli; Y. Tsunoda; T. Otsuka; G. Authelet; H. Baba; D. Calvet; F. Château; A. Corsi; A. Delbart; J. M. Gheller; A. Gillibert; T. Isobe; V. Lapoux; M. Matsushita; S. Momiyama; T. Motobayashi; H. Otsu; C. Péron; A. Peyaud; E. C. Pollacco; J. Y. Roussé; H. Sakurai; C. Santamaria; M. Sasano; Y. Shiga; S. Takeuchi; R. Taniuchi; T. Uesaka; H. Wang; K. Yoneda; F. Browne; L. X. Chung; Z. Dombradi; F. Flavigny; F. Giacoppo; A. Gottardo; K. Hadyńska-Klȩk; Z. Korkulu; S. Koyama; Y. Kubota; J. Lee; M. Lettmann; C. Louchart; R. Lozeva; K. Matsui; T. Miyazaki; S. Nishimura; K. Ogata; S. Ota; Z. Patel; E. Sahin; C. Shand; P. A. Söderström; I. Stefan; D. Steppenbeck; T. Sumikama; D. Suzuki; V. Werner; J. Wu; Z. Xu

doi:10.1103/PhysRevLett.119.192501

Persistence of the Z=28 Shell Gap Around Ni 78: First Spectroscopy of Cu 79

L. Olivier, S. Franchoo, M. Niikura, Z. Vajta, D. Sohler, P. Doornenbal, A. Obertelli, Y. Tsunoda, T. Otsuka, G. Authelet, H. Baba, D. Calvet, F. Château, A. Corsi, A. Delbart, J. M. Gheller, A. Gillibert, T. Isobe, V. Lapoux, M. MatsushitaS. Momiyama, T. Motobayashi, H. Otsu, C. Péron, A. Peyaud, E. C. Pollacco, J. Y. Roussé, H. Sakurai, C. Santamaria, M. Sasano, Y. Shiga, S. Takeuchi, R. Taniuchi, T. Uesaka, H. Wang, K. Yoneda, F. Browne, L. X. Chung, Z. Dombradi, F. Flavigny, F. Giacoppo, A. Gottardo, K. Hadyńska-Klȩk, Z. Korkulu, S. Koyama, Y. Kubota, J. Lee, M. Lettmann, C. Louchart, R. Lozeva, K. Matsui, T. Miyazaki, S. Nishimura, K. Ogata, S. Ota, Z. Patel, E. Sahin, C. Shand, P. A. Söderström, I. Stefan, D. Steppenbeck, T. Sumikama, D. Suzuki, V. Werner, J. Wu, Z. Xu

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Abstract

In-beam γ-ray spectroscopy of Cu79 is performed at the Radioactive Isotope Beam Factory of RIKEN. The nucleus of interest is produced through proton knockout from a Zn80 beam at 270 MeV/nucleon. The level scheme up to 4.6 MeV is established for the first time and the results are compared to Monte Carlo shell-model calculations. We do not observe significant knockout feeding to the excited states below 2.2 MeV, which indicates that the Z=28 gap at N=50 remains large. The results show that the Cu79 nucleus can be described in terms of a valence proton outside a Ni78 core, implying the magic character of the latter.

Original language	English
Article number	192501
Journal	Physical review letters
Volume	119
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.119.192501
Publication status	Published - Nov 6 2017
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1103/PhysRevLett.119.192501

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Olivier, L., Franchoo, S., Niikura, M., Vajta, Z., Sohler, D., Doornenbal, P., Obertelli, A., Tsunoda, Y., Otsuka, T., Authelet, G., Baba, H., Calvet, D., Château, F., Corsi, A., Delbart, A., Gheller, J. M., Gillibert, A., Isobe, T., Lapoux, V., ... Xu, Z. (2017). Persistence of the Z=28 Shell Gap Around Ni 78: First Spectroscopy of Cu 79. Physical review letters, 119(19), [192501]. https://doi.org/10.1103/PhysRevLett.119.192501

Olivier, L, Franchoo, S, Niikura, M, Vajta, Z, Sohler, D, Doornenbal, P, Obertelli, A, Tsunoda, Y, Otsuka, T, Authelet, G, Baba, H, Calvet, D, Château, F, Corsi, A, Delbart, A, Gheller, JM, Gillibert, A, Isobe, T, Lapoux, V, Matsushita, M, Momiyama, S, Motobayashi, T, Otsu, H, Péron, C, Peyaud, A, Pollacco, EC, Roussé, JY, Sakurai, H, Santamaria, C, Sasano, M, Shiga, Y, Takeuchi, S, Taniuchi, R, Uesaka, T, Wang, H, Yoneda, K, Browne, F, Chung, LX, Dombradi, Z, Flavigny, F, Giacoppo, F, Gottardo, A, Hadyńska-Klȩk, K, Korkulu, Z, Koyama, S, Kubota, Y, Lee, J, Lettmann, M, Louchart, C, Lozeva, R, Matsui, K, Miyazaki, T, Nishimura, S, Ogata, K, Ota, S, Patel, Z, Sahin, E, Shand, C, Söderström, PA, Stefan, I, Steppenbeck, D, Sumikama, T, Suzuki, D, Werner, V, Wu, J & Xu, Z 2017, 'Persistence of the Z=28 Shell Gap Around Ni 78: First Spectroscopy of Cu 79', Physical review letters, vol. 119, no. 19, 192501. https://doi.org/10.1103/PhysRevLett.119.192501

@article{3ba99530633a49cda4758723f9fdbf4c,

title = "Persistence of the Z=28 Shell Gap Around Ni 78: First Spectroscopy of Cu 79",

abstract = "In-beam γ-ray spectroscopy of Cu79 is performed at the Radioactive Isotope Beam Factory of RIKEN. The nucleus of interest is produced through proton knockout from a Zn80 beam at 270 MeV/nucleon. The level scheme up to 4.6 MeV is established for the first time and the results are compared to Monte Carlo shell-model calculations. We do not observe significant knockout feeding to the excited states below 2.2 MeV, which indicates that the Z=28 gap at N=50 remains large. The results show that the Cu79 nucleus can be described in terms of a valence proton outside a Ni78 core, implying the magic character of the latter.",

author = "L. Olivier and S. Franchoo and M. Niikura and Z. Vajta and D. Sohler and P. Doornenbal and A. Obertelli and Y. Tsunoda and T. Otsuka and G. Authelet and H. Baba and D. Calvet and F. Ch{\^a}teau and A. Corsi and A. Delbart and Gheller, {J. M.} and A. Gillibert and T. Isobe and V. Lapoux and M. Matsushita and S. Momiyama and T. Motobayashi and H. Otsu and C. P{\'e}ron and A. Peyaud and Pollacco, {E. C.} and Rouss{\'e}, {J. Y.} and H. Sakurai and C. Santamaria and M. Sasano and Y. Shiga and S. Takeuchi and R. Taniuchi and T. Uesaka and H. Wang and K. Yoneda and F. Browne and Chung, {L. X.} and Z. Dombradi and F. Flavigny and F. Giacoppo and A. Gottardo and K. Hady{\'n}ska-Klȩk and Z. Korkulu and S. Koyama and Y. Kubota and J. Lee and M. Lettmann and C. Louchart and R. Lozeva and K. Matsui and T. Miyazaki and S. Nishimura and K. Ogata and S. Ota and Z. Patel and E. Sahin and C. Shand and S{\"o}derstr{\"o}m, {P. A.} and I. Stefan and D. Steppenbeck and T. Sumikama and D. Suzuki and V. Werner and J. Wu and Z. Xu",

note = "Funding Information: The authors are thankful to the RIBF and BigRIPS teams for the stable operation and high intensity of the uranium primary beam, and production of secondary beams during the experiment. The development of MINOS and the core MINOS team have been supported by the European Research Council through the ERC Grant No. MINOS-258567. A. O. was supported by JSPS long-term fellowship L-13520 from September 2013 to June 2014 at the RIKEN Nishina Center. A. O. deeply thanks the ERC and JSPS for their support. C. S. was supported by the IPA program at the RIKEN Nishina Center. A. O. and C. S. are grateful to the RIKEN Nishina Center for its hospitality. This work was supported by JSPS Grant-in-Aid for a JSPS Research Fellow (No. 268718). The MCSM calculations were performed on the K computer at RIKEN AICS (hp150224, hp160211). This work was supported in part by the HPCI Strategic Program (“The Origin of Matter and the Universe”) and the “Priority Issue on Post-K computer” (“Elucidation of the Fundamental Laws and Evolution of the Universe”) from MEXT and JICFuS. Z. D. and Z. V. were supported by the GINOP-2.3.3-15-2016-00034 contract. L. X. C. would like to thank MOST for its support. M. L. and V. W. acknowledge the German BMBF with the supporting No. 05P15RDFN1 and No. 05P12RDFN8. We thank N. Paul for her careful reading of the Letter. Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

month = nov,

day = "6",

doi = "10.1103/PhysRevLett.119.192501",

language = "English",

volume = "119",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "19",

}

TY - JOUR

T1 - Persistence of the Z=28 Shell Gap Around Ni 78

T2 - First Spectroscopy of Cu 79

AU - Olivier, L.

AU - Franchoo, S.

AU - Niikura, M.

AU - Vajta, Z.

AU - Sohler, D.

AU - Doornenbal, P.

AU - Obertelli, A.

AU - Tsunoda, Y.

AU - Otsuka, T.

AU - Authelet, G.

AU - Baba, H.

AU - Calvet, D.

AU - Château, F.

AU - Corsi, A.

AU - Delbart, A.

AU - Gheller, J. M.

AU - Gillibert, A.

AU - Isobe, T.

AU - Lapoux, V.

AU - Matsushita, M.

AU - Momiyama, S.

AU - Motobayashi, T.

AU - Otsu, H.

AU - Péron, C.

AU - Peyaud, A.

AU - Pollacco, E. C.

AU - Roussé, J. Y.

AU - Sakurai, H.

AU - Santamaria, C.

AU - Sasano, M.

AU - Shiga, Y.

AU - Takeuchi, S.

AU - Taniuchi, R.

AU - Uesaka, T.

AU - Wang, H.

AU - Yoneda, K.

AU - Browne, F.

AU - Chung, L. X.

AU - Dombradi, Z.

AU - Flavigny, F.

AU - Giacoppo, F.

AU - Gottardo, A.

AU - Hadyńska-Klȩk, K.

AU - Korkulu, Z.

AU - Koyama, S.

AU - Kubota, Y.

AU - Lee, J.

AU - Lettmann, M.

AU - Louchart, C.

AU - Lozeva, R.

AU - Matsui, K.

AU - Miyazaki, T.

AU - Nishimura, S.

AU - Ogata, K.

AU - Ota, S.

AU - Patel, Z.

AU - Sahin, E.

AU - Shand, C.

AU - Söderström, P. A.

AU - Stefan, I.

AU - Steppenbeck, D.

AU - Sumikama, T.

AU - Suzuki, D.

AU - Werner, V.

AU - Wu, J.

AU - Xu, Z.

N1 - Funding Information: The authors are thankful to the RIBF and BigRIPS teams for the stable operation and high intensity of the uranium primary beam, and production of secondary beams during the experiment. The development of MINOS and the core MINOS team have been supported by the European Research Council through the ERC Grant No. MINOS-258567. A. O. was supported by JSPS long-term fellowship L-13520 from September 2013 to June 2014 at the RIKEN Nishina Center. A. O. deeply thanks the ERC and JSPS for their support. C. S. was supported by the IPA program at the RIKEN Nishina Center. A. O. and C. S. are grateful to the RIKEN Nishina Center for its hospitality. This work was supported by JSPS Grant-in-Aid for a JSPS Research Fellow (No. 268718). The MCSM calculations were performed on the K computer at RIKEN AICS (hp150224, hp160211). This work was supported in part by the HPCI Strategic Program (“The Origin of Matter and the Universe”) and the “Priority Issue on Post-K computer” (“Elucidation of the Fundamental Laws and Evolution of the Universe”) from MEXT and JICFuS. Z. D. and Z. V. were supported by the GINOP-2.3.3-15-2016-00034 contract. L. X. C. would like to thank MOST for its support. M. L. and V. W. acknowledge the German BMBF with the supporting No. 05P15RDFN1 and No. 05P12RDFN8. We thank N. Paul for her careful reading of the Letter. Publisher Copyright: © 2017 American Physical Society.

PY - 2017/11/6

Y1 - 2017/11/6

N2 - In-beam γ-ray spectroscopy of Cu79 is performed at the Radioactive Isotope Beam Factory of RIKEN. The nucleus of interest is produced through proton knockout from a Zn80 beam at 270 MeV/nucleon. The level scheme up to 4.6 MeV is established for the first time and the results are compared to Monte Carlo shell-model calculations. We do not observe significant knockout feeding to the excited states below 2.2 MeV, which indicates that the Z=28 gap at N=50 remains large. The results show that the Cu79 nucleus can be described in terms of a valence proton outside a Ni78 core, implying the magic character of the latter.

AB - In-beam γ-ray spectroscopy of Cu79 is performed at the Radioactive Isotope Beam Factory of RIKEN. The nucleus of interest is produced through proton knockout from a Zn80 beam at 270 MeV/nucleon. The level scheme up to 4.6 MeV is established for the first time and the results are compared to Monte Carlo shell-model calculations. We do not observe significant knockout feeding to the excited states below 2.2 MeV, which indicates that the Z=28 gap at N=50 remains large. The results show that the Cu79 nucleus can be described in terms of a valence proton outside a Ni78 core, implying the magic character of the latter.

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U2 - 10.1103/PhysRevLett.119.192501

DO - 10.1103/PhysRevLett.119.192501

M3 - Article

C2 - 29219515

AN - SCOPUS:85033591421

SN - 0031-9007

VL - 119

JO - Physical Review Letters

JF - Physical Review Letters

IS - 19

M1 - 192501

ER -

Persistence of the Z=28 Shell Gap Around Ni 78: First Spectroscopy of Cu 79

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