Extending the Southern Shore of the Island of Inversion to F28

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

doi:10.1103/PhysRevLett.124.152502

Title: Extending the Southern Shore of the Island of Inversion to ${}^{28}F$

Abstract

Detailed spectroscopy of the neutron-unbound nucleus ²⁸F has been performed for the first time following proton/neutron removal from ²⁹Ne/²⁹F beams at energies around 230 MeV / nucleon . The invariant-mass spectra were reconstructed for both the ²⁷F(*) + n and ²⁶F(*) + 2n coincidences and revealed a series of well-defined resonances. A near-threshold state was observed in both reactions and is identified as the ²⁸F ground state, with S_n(²⁸F) = -199(6) keV, while analysis of the 2n decay channel allowed a considerably improved S_n(²⁷F) = 162(60) keV to be deduced. Comparison with shell-model predictions and eikonal-model reaction calculations have allowed spin-parity assignments to be proposed for some of the lower-lying levels of ²⁸F. Importantly, in the case of the ground state, the reconstructed ²⁷F + n momentum distribution following neutron removal from ²⁹F indicates that it arises mainly from the 1p_3/2 neutron intruder configuration. Finally, this demonstrates that the island of inversion around N = 20 includes ²⁸F, and most probably ²⁹F, and suggests that ²⁸O is not doubly magic.

Authors:

Revel, A.; Sorlin, O.;

; Kondo, Y.; Kahlbow, J.; Nakamura, T.; Orr, N. A.; Nowacki, F.; Tostevin, J. A.; Yuan, C. X.; Achouri, N. L.; Al Falou, H.; Atar, L.; Aumann, T.; Baba, H.; Boretzky, K.; Caesar, C.; Calvet, D.; Chae, H.; Chiga, N. more »

Publication Date:: Thu Apr 16 00:00:00 EDT 2020

Research Org.:: Argonne National Laboratory (ANL), Argonne, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP); United Kingdom Science and Technology Facilities Council; RIKEN Nishina Center; Croatian Science Foundation; German Research Foundation (DFG)

Contributing Org.:: SAMURAI21 collaboration

OSTI Identifier:: 1630826

Alternate Identifier(s):: OSTI ID: 1615113; OSTI ID: 1650086

Grant/Contract Number:: AC02-06CH11357; ST/L005743

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 124; Journal Issue: 15; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; binding energy & masses; direct reactions; energy levels & level densities; models & methods for nuclear reactions; rare & new isotopes

Citation Formats


                    Revel, A., Sorlin, O., Marqués, F. M., Kondo, Y., Kahlbow, J., Nakamura, T., Orr, N. A., Nowacki, F., Tostevin, J. A., Yuan, C. X., Achouri, N. L., Al Falou, H., Atar, L., Aumann, T., Baba, H., Boretzky, K., Caesar, C., Calvet, D., Chae, H., Chiga, N., Corsi, A., Crawford, H. L., Delaunay, F., Delbart, A., Deshayes, Q., Dombrádi, Z., Douma, C. A., Elekes, Z., Fallon, P., Gašparić, I., Gheller, J. -M., Gibelin, J., Gillibert, A., Harakeh, M. N., He, W., Hirayama, A., Hoffman, C. R., Holl, M., Horvat, A., Horváth, Á., Hwang, J. W., Isobe, T., Kalantar-Nayestanaki, N., Kawase, S., Kim, S., Kisamori, K., Kobayashi, T., Körper, D., Koyama, S., Kuti, I., Lapoux, V., Lindberg, S., Masuoka, S., Mayer, J., Miki, K., Murakami, T., Najafi, M., Nakano, K., Nakatsuka, N., Nilsson, T., Obertelli, A., de Oliveira Santos, F., Otsu, H., Ozaki, T., Panin, V., Paschalis, S., Rossi, D., Saito, A. T., Saito, T., Sasano, M., Sato, H., Satou, Y., Scheit, H., Schindler, F., Schrock, P., Shikata, M., Shimizu, Y., Simon, H., Sohler, D., Stuhl, L., Takeuchi, S., Tanaka, M., Thoennessen, M., Törnqvist, H., Togano, Y., Tomai, T., Tscheuschner, J., Tsubota, J., Uesaka, T., Yang, Z., Yasuda, M., and Yoneda, K. Extending the Southern Shore of the Island of Inversion to F28.  United States: N. p., 2020. 
Web.  doi:10.1103/PhysRevLett.124.152502.

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                    Revel, A., Sorlin, O., Marqués, F. M., Kondo, Y., Kahlbow, J., Nakamura, T., Orr, N. A., Nowacki, F., Tostevin, J. A., Yuan, C. X., Achouri, N. L., Al Falou, H., Atar, L., Aumann, T., Baba, H., Boretzky, K., Caesar, C., Calvet, D., Chae, H., Chiga, N., Corsi, A., Crawford, H. L., Delaunay, F., Delbart, A., Deshayes, Q., Dombrádi, Z., Douma, C. A., Elekes, Z., Fallon, P., Gašparić, I., Gheller, J. -M., Gibelin, J., Gillibert, A., Harakeh, M. N., He, W., Hirayama, A., Hoffman, C. R., Holl, M., Horvat, A., Horváth, Á., Hwang, J. W., Isobe, T., Kalantar-Nayestanaki, N., Kawase, S., Kim, S., Kisamori, K., Kobayashi, T., Körper, D., Koyama, S., Kuti, I., Lapoux, V., Lindberg, S., Masuoka, S., Mayer, J., Miki, K., Murakami, T., Najafi, M., Nakano, K., Nakatsuka, N., Nilsson, T., Obertelli, A., de Oliveira Santos, F., Otsu, H., Ozaki, T., Panin, V., Paschalis, S., Rossi, D., Saito, A. T., Saito, T., Sasano, M., Sato, H., Satou, Y., Scheit, H., Schindler, F., Schrock, P., Shikata, M., Shimizu, Y., Simon, H., Sohler, D., 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. Extending the Southern Shore of the Island of Inversion to F28.  United States.  https://doi.org/10.1103/PhysRevLett.124.152502

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                    Revel, A., Sorlin, O., Marqués, F. M., Kondo, Y., Kahlbow, J., Nakamura, T., Orr, N. A., Nowacki, F., Tostevin, J. A., Yuan, C. X., Achouri, N. L., Al Falou, H., Atar, L., Aumann, T., Baba, H., Boretzky, K., Caesar, C., Calvet, D., Chae, H., Chiga, N., Corsi, A., Crawford, H. L., Delaunay, F., Delbart, A., Deshayes, Q., Dombrádi, Z., Douma, C. A., Elekes, Z., Fallon, P., Gašparić, I., Gheller, J. -M., Gibelin, J., Gillibert, A., Harakeh, M. N., He, W., Hirayama, A., Hoffman, C. R., Holl, M., Horvat, A., Horváth, Á., Hwang, J. W., Isobe, T., Kalantar-Nayestanaki, N., Kawase, S., Kim, S., Kisamori, K., Kobayashi, T., Körper, D., Koyama, S., Kuti, I., Lapoux, V., Lindberg, S., Masuoka, S., Mayer, J., Miki, K., Murakami, T., Najafi, M., Nakano, K., Nakatsuka, N., Nilsson, T., Obertelli, A., de Oliveira Santos, F., Otsu, H., Ozaki, T., Panin, V., Paschalis, S., Rossi, D., Saito, A. T., Saito, T., Sasano, M., Sato, H., Satou, Y., Scheit, H., Schindler, F., Schrock, P., Shikata, M., Shimizu, Y., Simon, H., Sohler, D., Stuhl, L., Takeuchi, S., Tanaka, M., Thoennessen, M., Törnqvist, H., Togano, Y., Tomai, T., Tscheuschner, J., Tsubota, J., Uesaka, T., Yang, Z., Yasuda, M., and Yoneda, K. Thu .  
"Extending the Southern Shore of the Island of Inversion to F28".  United States.  https://doi.org/10.1103/PhysRevLett.124.152502.  https://www.osti.gov/servlets/purl/1630826.

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@article{osti_1630826,

  title        = {Extending the Southern Shore of the Island of Inversion to F28},

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

  abstractNote = {Detailed spectroscopy of the neutron-unbound nucleus 28F has been performed for the first time following proton/neutron removal from 29Ne/29F beams at energies around 230 MeV / nucleon . The invariant-mass spectra were reconstructed for both the 27F(*) + n and 26F(*) + 2n coincidences and revealed a series of well-defined resonances. A near-threshold state was observed in both reactions and is identified as the 28F ground state, with Sn(28F) = -199(6) keV, while analysis of the 2n decay channel allowed a considerably improved Sn(27F) = 162(60) keV to be deduced. Comparison with shell-model predictions and eikonal-model reaction calculations have allowed spin-parity assignments to be proposed for some of the lower-lying levels of 28F. Importantly, in the case of the ground state, the reconstructed 27F + n momentum distribution following neutron removal from 29F indicates that it arises mainly from the 1p3/2 neutron intruder configuration. Finally, this demonstrates that the island of inversion around N = 20 includes 28F, and most probably 29F, and suggests that 28O is not doubly magic.},

  doi          = {10.1103/PhysRevLett.124.152502},

  journal      = {Physical Review Letters},

  number       = 15,

  volume       = 124,

  place        = {United States},

  year         = {Thu Apr 16 00:00:00 EDT 2020},

  month        = {Thu Apr 16 00:00:00 EDT 2020}

}

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