Border of the island of inversion: Unbound states in Ne 29

M. Holl; S. Lindberg; A. Heinz; Y. Kondo; T. Nakamura; J. A. Tostevin; H. Wang; T. Nilsson; N. L. Achouri; H. Al Falou; L. Atar; T. Aumann; H. Baba; K. Boretzky; C. Caesar; D. Calvet; H. Chae; N. Chiga; A. Corsi; H. L. Crawford; F. Delaunay; A. Delbart; Q. Deshayes; P. Díaz Fernández; Z. Dombrádi; C. A. Douma; Z. Elekes; P. Fallon; I. Gašparić; J. M. Gheller; J. Gibelin; A. Gillibert; M. N. Harakeh; A. Hirayama; C. R. Hoffman; A. Horvat; Horváth; J. W. Hwang; T. Isobe; J. Kahlbow; N. Kalantar-Nayestanaki; S. Kawase; S. Kim; K. Kisamori; T. Kobayashi; D. Körper; S. Koyama; I. Kuti; V. Lapoux; F. M. Marqués; S. Masuoka; J. Mayer; K. Miki; T. Murakami; M. Najafi; K. Nakano; N. Nakatsuka; A. Obertelli; F. De Oliveira Santos; N. A. Orr; H. Otsu; T. Ozaki; V. Panin; S. Paschalis; A. Revel; D. Rossi; A. T. Saito; T. Y. Saito; M. Sasano; H. Sato; Y. Satou; H. Scheit; F. Schindler; P. Schrock; M. Shikata; Y. Shimizu; H. Simon; D. Sohler; O. Sorlin; L. Stuhl; S. Takeuchi; M. Tanaka; M. Thoennessen; H. Törnqvist; Y. Togano; T. Tomai; J. Tscheuschner; J. Tsubota; T. Uesaka; Z. Yang; M. Yasuda; K. Yoneda

doi:10.1103/PhysRevC.105.034301

Border of the island of inversion: Unbound states in Ne 29

M. Holl, S. Lindberg, A. Heinz, Y. Kondo, T. Nakamura, J. A. Tostevin, H. Wang, T. Nilsson, N. L. Achouri, H. Al Falou, L. Atar, T. Aumann, H. Baba, K. Boretzky, C. Caesar, D. Calvet, H. Chae, N. Chiga, A. Corsi, H. L. CrawfordF. Delaunay, A. Delbart, Q. Deshayes, P. Díaz Fernández, Z. Dombrádi, C. A. Douma, Z. Elekes, P. Fallon, I. Gašparić, J. M. Gheller, J. Gibelin, A. Gillibert, M. N. Harakeh, A. Hirayama, C. R. Hoffman, A. Horvat, Horváth, J. W. Hwang, T. Isobe, J. Kahlbow, N. Kalantar-Nayestanaki, S. Kawase, S. Kim, K. Kisamori, T. Kobayashi, D. Körper, S. Koyama, I. Kuti, V. Lapoux, F. M. Marqués, S. Masuoka, J. Mayer, K. Miki, T. Murakami, M. Najafi, K. Nakano, N. Nakatsuka, A. Obertelli, F. De Oliveira Santos, N. A. Orr, H. Otsu, T. Ozaki, V. Panin, S. Paschalis, A. Revel, D. Rossi, A. T. Saito, T. Y. Saito, M. Sasano, H. Sato, Y. Satou, H. Scheit, F. Schindler, P. Schrock, M. Shikata, Y. Shimizu, H. Simon, D. Sohler, O. Sorlin, L. Stuhl, S. Takeuchi, M. Tanaka, M. Thoennessen, H. Törnqvist, Y. Togano, T. Tomai, J. Tscheuschner, J. Tsubota, T. Uesaka, Z. Yang, M. Yasuda, K. Yoneda

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Abstract

The nucleus Ne29 is situated at the border of the island of inversion. Despite significant efforts, no bound low-lying intruder f7/2 state, which would place Ne29 firmly inside the island of inversion, has yet been observed. Here, the first investigation of unbound states of Ne29 is reported. The states were populated in Ne30(p,pn) and Na30(p,2p) reactions at a beam energy of around 230 MeV/nucleon, and analyzed in terms of their resonance properties, partial cross sections, and momentum distributions. The momentum distributions are compared to calculations using the eikonal, direct reaction model, allowing ℓ assignments for the observed states. The lowest-lying resonance at an excitation energy of 1.48(4) MeV shows clear signs of a significant ℓ=3 component, giving first evidence for f7/2 single particle strength in Ne29. The excitation energies and strengths of the observed states are compared to shell-model calculations using the sdpf-u-mix interaction.

Original language	English
Article number	034301
Journal	Physical Review C
Volume	105
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.105.034301
Publication status	Published - 2022 Mar
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.105.034301

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Holl, M., Lindberg, S., Heinz, A., Kondo, Y., Nakamura, T., Tostevin, J. A., Wang, H., Nilsson, T., Achouri, N. L., Al Falou, H., Atar, L., Aumann, T., Baba, H., Boretzky, K., Caesar, C., Calvet, D., Chae, H., Chiga, N., Corsi, A., ... Yoneda, K. (2022). Border of the island of inversion: Unbound states in Ne 29. Physical Review C, 105(3), [034301]. https://doi.org/10.1103/PhysRevC.105.034301

Holl, M, Lindberg, S, Heinz, A, Kondo, Y, Nakamura, T, Tostevin, JA, Wang, H, Nilsson, T, Achouri, NL, Al Falou, H, Atar, L, Aumann, T, Baba, H, Boretzky, K, Caesar, C, Calvet, D, Chae, H, Chiga, N, Corsi, A, Crawford, HL, Delaunay, F, Delbart, A, Deshayes, Q, Díaz Fernández, P, Dombrádi, Z, Douma, CA, Elekes, Z, Fallon, P, Gašparić, I, Gheller, JM, Gibelin, J, Gillibert, A, Harakeh, MN, Hirayama, A, Hoffman, CR, Horvat, A, Horváth, Hwang, JW, Isobe, T, Kahlbow, J, Kalantar-Nayestanaki, N, Kawase, S, Kim, S, Kisamori, K, Kobayashi, T, Körper, D, Koyama, S, Kuti, I, Lapoux, V, Marqués, FM, Masuoka, S, Mayer, J, Miki, K, Murakami, T, Najafi, M, Nakano, K, Nakatsuka, N, Obertelli, A, De Oliveira Santos, F, Orr, NA, Otsu, H, Ozaki, T, Panin, V, Paschalis, S, Revel, A, Rossi, D, Saito, AT, Saito, TY, Sasano, M, Sato, H, Satou, Y, Scheit, H, Schindler, F, Schrock, P, Shikata, M, Shimizu, Y, Simon, H, Sohler, D, Sorlin, O, Stuhl, L, Takeuchi, S, Tanaka, M, Thoennessen, M, Törnqvist, H, Togano, Y, Tomai, T, Tscheuschner, J, Tsubota, J, Uesaka, T, Yang, Z, Yasuda, M & Yoneda, K 2022, 'Border of the island of inversion: Unbound states in Ne 29', Physical Review C, vol. 105, no. 3, 034301. https://doi.org/10.1103/PhysRevC.105.034301

@article{8c9d171ab65443cb88fa70beeb4cfc14,

title = "Border of the island of inversion: Unbound states in Ne 29",

abstract = "The nucleus Ne29 is situated at the border of the island of inversion. Despite significant efforts, no bound low-lying intruder f7/2 state, which would place Ne29 firmly inside the island of inversion, has yet been observed. Here, the first investigation of unbound states of Ne29 is reported. The states were populated in Ne30(p,pn) and Na30(p,2p) reactions at a beam energy of around 230 MeV/nucleon, and analyzed in terms of their resonance properties, partial cross sections, and momentum distributions. The momentum distributions are compared to calculations using the eikonal, direct reaction model, allowing ℓ assignments for the observed states. The lowest-lying resonance at an excitation energy of 1.48(4) MeV shows clear signs of a significant ℓ=3 component, giving first evidence for f7/2 single particle strength in Ne29. The excitation energies and strengths of the observed states are compared to shell-model calculations using the sdpf-u-mix interaction.",

author = "M. Holl and S. Lindberg and A. Heinz and Y. Kondo and T. Nakamura and Tostevin, {J. A.} and H. Wang and T. Nilsson and Achouri, {N. L.} and {Al Falou}, H. and L. Atar and T. Aumann and H. Baba and K. Boretzky and C. Caesar and D. Calvet and H. Chae and N. Chiga and A. Corsi and Crawford, {H. L.} and F. Delaunay and A. Delbart and Q. Deshayes and {D{\'i}az Fern{\'a}ndez}, P. and Z. Dombr{\'a}di and Douma, {C. A.} and Z. Elekes and P. Fallon and I. Ga{\v s}pari{\'c} and Gheller, {J. M.} and J. Gibelin and A. Gillibert and Harakeh, {M. N.} and A. Hirayama and Hoffman, {C. R.} and A. Horvat and Horv{\'a}th and Hwang, {J. W.} and T. Isobe and J. Kahlbow and N. Kalantar-Nayestanaki and S. Kawase and S. Kim and K. Kisamori and T. Kobayashi and D. K{\"o}rper and S. Koyama and I. Kuti and V. Lapoux and Marqu{\'e}s, {F. M.} and S. Masuoka and J. Mayer and K. Miki and T. Murakami and M. Najafi and K. Nakano and N. Nakatsuka and A. Obertelli and {De Oliveira Santos}, F. and Orr, {N. A.} and H. Otsu and T. Ozaki and V. Panin and S. Paschalis and A. Revel and D. Rossi and Saito, {A. T.} and Saito, {T. Y.} and M. Sasano and H. Sato and Y. Satou and H. Scheit and F. Schindler and P. Schrock and M. Shikata and Y. Shimizu and H. Simon and D. Sohler and O. Sorlin and L. Stuhl and S. Takeuchi and M. Tanaka and M. Thoennessen and H. T{\"o}rnqvist and Y. Togano and T. Tomai and J. Tscheuschner and J. Tsubota and T. Uesaka and Z. Yang and M. Yasuda and K. Yoneda",

note = "Funding Information: We thank Alfredo Poves and Fr{\'e}d{\'e}ric Nowacki for providing results from large-scale shell model calculations. Support was provided by the Swedish Research Council under Grant Nos. 2011-5324 and 2017-03839. This work was supported partially by JSPS KAKENHI Grant Nos. JP16H02179 and JP18H05404. J.A.T. acknowledges visiting researcher support at Tokyo Institute of Technology from MEXT KAKANHI Grant No. JP18H05400 and the support of the Science and Technology Facilities Council (U.K.) Grant No. ST/L005743/1. The LPC-Caen group wished to acknowledge support from the Franco-Japanese LIA-International Associated Laboratory for Nuclear Structure Problems as well as the French ANR-14-CE33-0022-02 EXPAND. This project was partly funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project-ID 279384907 - SFB 1245 and the GSI-TU Darmstadt cooperation agreement. This work was in part supported by the Institute for Basic Science (IBS-R031-D1) in Republic of Korea. Additional support from the European Regional Development Fund Contract No. GINOP-2.3.3-15-2016-00034 and the National Research, Development and Innovation Fund of Hungary via Project No. K128947. I.G. has been supported by the Helmholtz International Center for FAIR and the Croatian Science Foundation (Hrvatska Zaklada za Znanost) under projects no. 1257 and 7194. Y.T. acknowledges the support by JSPS Grant-Aid for Scientific Research Grants No. JP21H01114. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357 (ANL). Publisher Copyright: {\textcopyright} 2022 authors.",

year = "2022",

month = mar,

doi = "10.1103/PhysRevC.105.034301",

language = "English",

volume = "105",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "3",

}

TY - JOUR

T1 - Border of the island of inversion

T2 - Unbound states in Ne 29

AU - Holl, M.

AU - Lindberg, S.

AU - Heinz, A.

AU - Kondo, Y.

AU - Nakamura, T.

AU - Tostevin, J. A.

AU - Wang, H.

AU - Nilsson, T.

AU - Achouri, N. L.

AU - Al Falou, H.

AU - Atar, L.

AU - Aumann, T.

AU - Baba, H.

AU - Boretzky, K.

AU - Caesar, C.

AU - Calvet, D.

AU - Chae, H.

AU - Chiga, N.

AU - Corsi, A.

AU - Crawford, H. L.

AU - Delaunay, F.

AU - Delbart, A.

AU - Deshayes, Q.

AU - Díaz Fernández, P.

AU - Dombrádi, Z.

AU - Douma, C. A.

AU - Elekes, Z.

AU - Fallon, P.

AU - Gašparić, I.

AU - Gheller, J. M.

AU - Gibelin, J.

AU - Gillibert, A.

AU - Harakeh, M. N.

AU - Hirayama, A.

AU - Hoffman, C. R.

AU - Horvat, A.

AU - Horváth,

AU - Hwang, J. W.

AU - Isobe, T.

AU - Kahlbow, J.

AU - Kalantar-Nayestanaki, N.

AU - Kawase, S.

AU - Kim, S.

AU - Kisamori, K.

AU - Kobayashi, T.

AU - Körper, D.

AU - Koyama, S.

AU - Kuti, I.

AU - Lapoux, V.

AU - Marqués, F. M.

AU - Masuoka, S.

AU - Mayer, J.

AU - Miki, K.

AU - Murakami, T.

AU - Najafi, M.

AU - Nakano, K.

AU - Nakatsuka, N.

AU - Obertelli, A.

AU - De Oliveira Santos, F.

AU - Orr, N. A.

AU - Otsu, H.

AU - Ozaki, T.

AU - Panin, V.

AU - Paschalis, S.

AU - Revel, A.

AU - Rossi, D.

AU - Saito, A. T.

AU - Saito, T. Y.

AU - Sasano, M.

AU - Sato, H.

AU - Satou, Y.

AU - Scheit, H.

AU - Schindler, F.

AU - Schrock, P.

AU - Shikata, M.

AU - Shimizu, Y.

AU - Simon, H.

AU - Sohler, D.

AU - Sorlin, O.

AU - Stuhl, L.

AU - Takeuchi, S.

AU - Tanaka, M.

AU - Thoennessen, M.

AU - Törnqvist, H.

AU - Togano, Y.

AU - Tomai, T.

AU - Tscheuschner, J.

AU - Tsubota, J.

AU - Uesaka, T.

AU - Yang, Z.

AU - Yasuda, M.

AU - Yoneda, K.

N1 - Funding Information: We thank Alfredo Poves and Frédéric Nowacki for providing results from large-scale shell model calculations. Support was provided by the Swedish Research Council under Grant Nos. 2011-5324 and 2017-03839. This work was supported partially by JSPS KAKENHI Grant Nos. JP16H02179 and JP18H05404. J.A.T. acknowledges visiting researcher support at Tokyo Institute of Technology from MEXT KAKANHI Grant No. JP18H05400 and the support of the Science and Technology Facilities Council (U.K.) Grant No. ST/L005743/1. The LPC-Caen group wished to acknowledge support from the Franco-Japanese LIA-International Associated Laboratory for Nuclear Structure Problems as well as the French ANR-14-CE33-0022-02 EXPAND. This project was partly funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project-ID 279384907 - SFB 1245 and the GSI-TU Darmstadt cooperation agreement. This work was in part supported by the Institute for Basic Science (IBS-R031-D1) in Republic of Korea. Additional support from the European Regional Development Fund Contract No. GINOP-2.3.3-15-2016-00034 and the National Research, Development and Innovation Fund of Hungary via Project No. K128947. I.G. has been supported by the Helmholtz International Center for FAIR and the Croatian Science Foundation (Hrvatska Zaklada za Znanost) under projects no. 1257 and 7194. Y.T. acknowledges the support by JSPS Grant-Aid for Scientific Research Grants No. JP21H01114. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357 (ANL). Publisher Copyright: © 2022 authors.

PY - 2022/3

Y1 - 2022/3

N2 - The nucleus Ne29 is situated at the border of the island of inversion. Despite significant efforts, no bound low-lying intruder f7/2 state, which would place Ne29 firmly inside the island of inversion, has yet been observed. Here, the first investigation of unbound states of Ne29 is reported. The states were populated in Ne30(p,pn) and Na30(p,2p) reactions at a beam energy of around 230 MeV/nucleon, and analyzed in terms of their resonance properties, partial cross sections, and momentum distributions. The momentum distributions are compared to calculations using the eikonal, direct reaction model, allowing ℓ assignments for the observed states. The lowest-lying resonance at an excitation energy of 1.48(4) MeV shows clear signs of a significant ℓ=3 component, giving first evidence for f7/2 single particle strength in Ne29. The excitation energies and strengths of the observed states are compared to shell-model calculations using the sdpf-u-mix interaction.

AB - The nucleus Ne29 is situated at the border of the island of inversion. Despite significant efforts, no bound low-lying intruder f7/2 state, which would place Ne29 firmly inside the island of inversion, has yet been observed. Here, the first investigation of unbound states of Ne29 is reported. The states were populated in Ne30(p,pn) and Na30(p,2p) reactions at a beam energy of around 230 MeV/nucleon, and analyzed in terms of their resonance properties, partial cross sections, and momentum distributions. The momentum distributions are compared to calculations using the eikonal, direct reaction model, allowing ℓ assignments for the observed states. The lowest-lying resonance at an excitation energy of 1.48(4) MeV shows clear signs of a significant ℓ=3 component, giving first evidence for f7/2 single particle strength in Ne29. The excitation energies and strengths of the observed states are compared to shell-model calculations using the sdpf-u-mix interaction.

UR - http://www.scopus.com/inward/record.url?scp=85126720941&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85126720941&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.105.034301

DO - 10.1103/PhysRevC.105.034301

M3 - Article

AN - SCOPUS:85126720941

SN - 2469-9985

VL - 105

JO - Physical Review C

JF - Physical Review C

IS - 3

M1 - 034301

ER -

Border of the island of inversion: Unbound states in Ne 29

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