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2. Gamow-Teller decay of <math><mmultiscripts><mi>Te</mi><mprescripts/><none/><mn>142</mn></mmultiscripts></math> to <math><mmultiscripts><mi mathvariant='normal'>I</mi><mprescripts/><none/><mn>142</mn></mmultiscripts></math>

Author

Moon, B., Moon, C.-B., Odahara, A., Lozeva, R., Nishimura, S., Yuan, C., Browne, F., Doornenbal, P., Lorusso, G., Patel, Z., Rice, S., Sinclair, L., Söderström, P.-A., Sumikama, T., Watanabe, H., Wu, J., Xu, Z.Y., Yagi, A., Ahn, D.S., Baba, H., Bello Garrote, F.L., Daido, R., Daugas, J.M., Didierjean, F., Fang, Y., Fukuda, N., Hong, B., Ideguchi, E., Inabe, N., Ishigaki, T., Isobe, T., Jung, H.S., Kameda, D., Kojouharov, I., Komatsubara, T., Kubo, T., Kwon, Y.K., Lee, C.S., Lee, P., Morimoto, S., Murai, D., Niikura, M., Nishibata, H., Nishizuka, I., Sakurai, H., Shimizu, Y., Suzuki, H., Takeda, H., Tshoo, K., Yokoyama, R., Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), and Université Paris-Saclay

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; The β decay of Te90142 to I89142 was investigated for the first time. The parent nucleus was produced by the in-flight fission of a U238 beam with an energy of 345 MeV per nucleon, impinging on a Be9 target at the Radioactive Isotope Beam Factory of RIKEN. Excited states in I142 were established by β-delayed γ-ray spectroscopy. The observed (1+) states in I142 could be interpreted to be predominantly the ν0h9/2⊗π0h11/2 configuration formed by a Gamow-Teller transition between a neutron in the 0h9/2 orbital and a proton in the 0h11/2 orbital. Additional features of the (1+) states are discussed by comparing with neighboring heavier isotones, such as Cs144 and La146. In the context of deformed shell-model calculations, the (11+) state is closely related to the ν[5,3,2]3/2⊗π[5,5,0]1/2 configuration, which may be related to the weak Gamow-Teller transition strength.

Published
2023

3. Spin-aligned RI beams via two-step fragmentation reactions

Author

Ichikawa, Y., Ueno, H., Ishii, Y., Furukawa, T., Yoshimi, A., Kameda, D., Watanabe, H., Aoi, N., Asahi, K., Balabanski, D.L., Chevrier, R., Daugas, J.M., Fukuda, N., Georgiev, G., Hayashi, H., Iijima, H., Inabe, N., Inoue, T., Ishihara, M., Kubo, T., Nanao, T., Ohnishi, T., Suzuki, K., Tsuchiya, M., Takeda, H., and Rajabali, M.M.

Published
2013
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4. Shape dynamics in neutron-rich Kr isotopes: Coulomb excitation of 92Kr, 94Kr and 96Kr

Author

Albers, M., Nomura, K., Warr, N., Blazhev, A., Jolie, J., Mücher, D., Bastin, B., Bauer, C., Bernards, C., Bettermann, L., Bildstein, V., Butterworth, J., Cappellazzo, M., Cederkäll, J., Cline, D., Darby, I., Das Gupta, S., Daugas, J.M., Davinson, T., De Witte, H., Diriken, J., Filipescu, D., Fiori, E., Fransen, C., Gaffney, L.P., Georgiev, G., Gernhäuser, R., Hackstein, M., Heinze, S., Hess, H., Huyse, M., Jenkins, D., Konki, J., Kowalczyk, M., Kröll, T., Krücken, R., Litzinger, J., Lutter, R., Marginean, N., Mihai, C., Moschner, K., Napiorkowski, P., Nara Singh, B.S., Nowak, K., Pakarinen, J., Pfeiffer, M., Radeck, D., Reiter, P., Rigby, S., Robledo, L.M., Rodríguez-Guzmán, R., Rudigier, M., Scheck, M., Seidlitz, M., Siebeck, B., Simpson, G.S., Thöle, P., Thomas, T., Van de Walle, J., Van Duppen, P., Vermeulen, M., Voulot, D., Wadsworth, R., Wenander, F., Wimmer, K., Zell, K.O., and Zielinska, M.

Published
2013
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5. First observation of the $\pi0h_{11/2}\otimes\nu 0h_{9/2}$ partner orbital configuration in the odd-odd $^{138}$I nucleus

Author

Moon, B., Gargano, A., Naïdja, H., Moon, C.-B., Odahara, A., Lozeva, R., Nishimura, S., Yuan, C., Browne, F., Doornenbal, P., Lorusso, G., Patel, Z., Rice, S., Si, M., Sinclair, L., Söderström, P.-A., Sumikama, T., Watanabe, H., Wu, J., Xu, Z.Y., Yagi, A., Ahn, D.S., Baba, H., Bello Garrote, F.L., Daido, R., Daugas, J.M., Didierjean, F., Fang, Y., Fukuda, N., Hong, B., Ideguchi, E., Inabe, N., Ishigaki, T., Isobe, T., Jung, H.S., Kameda, D., Kojouharov, I., Komatsubara, T., Kubo, T., Kwon, Y.K., Lee, C.S., Lee, P., Morimoto, S., Murai, D., Niikura, M., Nishibata, H., Nishizuka, I., Sakurai, H., Shimizu, Y., Suzuki, H., Takeda, H., Tshoo, K., Yokoyama, R., Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), and Université Paris-Saclay

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; The β-decay scheme of Te138 and the level structure of I138 is reported for the first time. The experiment was performed at the Radioactive Isotope Beam Factory of RIKEN, as one of the EUROBALL-RIKEN Cluster Array campaigns. Secondary radioactive ions, including Te138 and Sb138, were produced by the in-flight fission of a U238 beam with the energy of 345 MeV per nucleon. From the β decay of Te138, the level scheme of I138 was supplemented with new spin and parity assignments, such as the low-lying negative-parity states and a positive-parity 1+ state. This 1+ state can be interpreted as being associated with the π0h11/2⊗ν0h9/2 partner orbital configuration populated by the Gamow-Teller transition between a neutron in the 0h9/2 orbital and a proton in the 0h11/2 orbital. Details of the structure of I138 are discussed in terms of the proton-neutron interactions and Gamow-Teller transition strength within the theoretical context of shell-model calculations.

Published
2022

6. First observation of the π0h11/2-ν0h9/2 partner orbital configuration in the odd-odd i 138 nucleus

Author

Moon, B., Gargano, A., Naïdja, H., Moon, C.-B., Odahara, A., Lozeva, R., Nishimura, S., Yuan, C., Browne, F., Doornenbal, P., Lorusso, G., Patel, Z., Rice, S., Si, M., Sinclair, L., Söderström, P.-A., Sumikama, T., Watanabe, H., Wu, J., Xu, Z.Y., Yagi, A., Ahn, D.S., Baba, H., Bello Garrote, Frank Leonel, Daido, R., Daugas, J.M., Didierjean, F., Fang, Y., Fukuda, N., Hong, B., Ideguchi, E., Inabe, N., Ishigaki, T., Isobe, T., Jung, H.S., Kameda, D., Kojouharov, I., Komatsubara, T., Kubo, T., Kwon, Y.K., Lee, C.S., Lee, P., Morimoto, S., Murai, D., Niikura, M., Nishibata, H., Nishizuka, I., Sakurai, H., Shimizu, Y., Suzuki, H., Takeda, H., Tshoo, K., and Yokoyama, R.

Abstract

The β-decay scheme of 138Te and the level structure of 138I is reported for the first time. The experiment was performed at the Radioactive Isotope Beam Factory of RIKEN, as one of the EUROBALL-RIKEN Cluster Array campaigns. Secondary radioactive ions, including 138Te and 138Sb, were produced by the in-flight fission of a 238U beam with the energy of 345 MeV per nucleon. From the β decay of 138Te, the level scheme of 138I was supplemented with new spin and parity assignments, such as the low-lying negative-parity states and a positive-parity 1+ state. This 1+ state can be interpreted as being associated with the π0h11/2⊗ν0h9/2 partner orbital configuration populated by the Gamow-Teller transition between a neutron in the 0h9/2 orbital and a proton in the 0h11/2 orbital. Details of the structure of 138I are discussed in terms of the proton-neutron interactions and Gamow-Teller transition strength within the theoretical context of shell-model calculations.

Published
2022

7. Boulay et al. Reply: Comment on 'g Factor of the Zr99(7/2+) Isomer: Monopole Evolution in the Shape-Coexisting Region'

Author

Boulay, F., Simpson, G.S., Ichikawa, Y., Kisyov, S., Bucurescu, D., Takamine, A., Ahn, D.S., Asahi, K., Baba, H., Balabanski, D.L., Egami, T., Fujita, T., Fukuda, N., Funayama, C., Furukawa, T., Georgiev, G., Gladkov, A., Hass, M., Imamura, K., Inabe, N., Ishibashi, Y., Kawaguchi, T., Kawamura, T., Kim, W., Kobayashi, Y., Kojima, S., Kusoglu, A., Lozeva, R., Momiyama, S., Mukul, I., Niikura, M., Nishibata, H., Nishizaka, T., Odahara, A., Ohtomo, Y., Ralet, D., Sato, T., Shimizu, Y., Sumikama, T., Suzuki, H., Takeda, H., Tao, L.C., Togano, Y., Tominaga, D., Ueno, H., Yamazaki, H., Yang, X.F., Daugas, J.M., Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), RIKEN Nishina Center for Accelerator-Based Science [Wako] (RIKEN RNC), RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
21.60.-n, 25.70.Mn, 23.20.En, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], numbers: 21.10.Ky, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2021

8. Magnetic moment of the 11/2 − isomeric state in 99 Mo and neutron spin g factor quenching in A∼100 nuclei

Author

Daugas, J.M., Rosse, B., Balabanski, D.L., Bucurescu, D., Kisyov, S., Regan, P.H., Georgiev, G., Gaudefroy, L., Gladnishki, K., Méot, V., Morel, P., Pietri, S., Roig, O., Simpson, G.S., DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université Paris Saclay, Extreme Light Infrastruture - Nuclear Physics (ELI-NP), National Institut for Nuclear Physics and Engineering (IFIN HH), National Institut for Nuclear Physics and Engineering, Romanian Academy, Department of Physics, University of Surrey, University of Surrey (UNIS), National Physical Laboratory [Teddington] (NPL), Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France, Faculty of Physics, Sofia University saint Kliment Ohridski, Helmholtz Centre for Heavy Ion Research (GSI), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and Sofia University 'St. Kliment Ohridski'

Subjects
[PHYS]Physics [physics]
Abstract

International audience; The gyromagnetic factor of the low-lying Ex=684.10(19)keV isomeric state of the nucleus 99Mo was measured using the time-dependent perturbed angular distribution technique. This level is assigned a spin and parity of Jπ=11/2−, with a half-life of T1/2=742(13)ns. The state of interest was populated and spin-aligned via a single-neutron transfer on a highly enriched 98Mo target. A magnetic moment μexpt.=−0.627(20)μN was obtained. This result is far from the Schmidt value expected for a pure single-particle νh11/2 state. A comparison of experimental spectroscopic properties of this nucleus is made with results of multishell Interacting boson-fermion Model (IBFM-1) calculations. In this approach, the Jπ=11/2− isomeric state in 99Mo has a pure νh11/2 configuration. Its magnetic moment, as well as that of other two excited states could be reasonably well reproduced by reducing the free neutron spin g factor with a quenching factor of 0.45. This low value is not appropriate only for this case, similar values for the quenching factor being also required in order to describe magnetic moments in other nuclei from the same mass region

Published
2021

10. Nuclear structure of Te isotopes beyond neutron magic number N=82

Author

RIKEN Nishina Center for Accelerator-Based Science, University of Tokyo, Institute for Basic Science (South Korea), National Research Foundation of Korea, Ministerio de Economía y Competitividad (España), Japan Society for the Promotion of Science, National Research, Development and Innovation Office (Hungary), Moon, B., Jungclaus, Andrea, Naïdja, H., Gargano, A., Lozeva, R., Moon, C.B., Odahara, A., Simpson, G. S., Nishimura, S., Browne, F., Doornenbal, P., Gey, G., Keatings, J., Lorusso, G., Patel, Z., Rice, S., Si, M., Sinclair, L., Söderström, P. A., Sumikama, T., Taprogge, J., Watanabe, H., Wu, J., Xu, Z. Y., Yagi, A., Ahn, D. S., Baba, H., Bello Garrote, F. L., Bönig, S., Daido, R., Daugas, J.M., Didierjean, F., Drouet, F., Fang, Y., Fukuda, N., Gernhäuser, R., Hong, B., Ideguchi, E., Ilieva, S., Inabe, N., Ishigaki, T., Isobe, T., Jung, H. S., Kameda, D., Kojouharov, I., Komatsubara, T., Kröll, T., Kubo, T., Kurz, N., Kwon, Y. K., Lee, C. S., Lee, P., Li, Z., Montaner-Pizá, A., Morimoto, S., Moschner, K., Mücher, D., Murai, D., Niikura, M., Nishibata, H., Nishizuka, I., Orlandi, R., Sakurai, H., Schaffner, H., Shimizu, Y., Steiger, K., Suzuki, H., Takeda, H., Tshoo, K., Vajta, Zs, Wendt, A., Yokoyama, R., Yoshinaga, K., RIKEN Nishina Center for Accelerator-Based Science, University of Tokyo, Institute for Basic Science (South Korea), National Research Foundation of Korea, Ministerio de Economía y Competitividad (España), Japan Society for the Promotion of Science, National Research, Development and Innovation Office (Hungary), Moon, B., Jungclaus, Andrea, Naïdja, H., Gargano, A., Lozeva, R., Moon, C.B., Odahara, A., Simpson, G. S., Nishimura, S., Browne, F., Doornenbal, P., Gey, G., Keatings, J., Lorusso, G., Patel, Z., Rice, S., Si, M., Sinclair, L., Söderström, P. A., Sumikama, T., Taprogge, J., Watanabe, H., Wu, J., Xu, Z. Y., Yagi, A., Ahn, D. S., Baba, H., Bello Garrote, F. L., Bönig, S., Daido, R., Daugas, J.M., Didierjean, F., Drouet, F., Fang, Y., Fukuda, N., Gernhäuser, R., Hong, B., Ideguchi, E., Ilieva, S., Inabe, N., Ishigaki, T., Isobe, T., Jung, H. S., Kameda, D., Kojouharov, I., Komatsubara, T., Kröll, T., Kubo, T., Kurz, N., Kwon, Y. K., Lee, C. S., Lee, P., Li, Z., Montaner-Pizá, A., Morimoto, S., Moschner, K., Mücher, D., Murai, D., Niikura, M., Nishibata, H., Nishizuka, I., Orlandi, R., Sakurai, H., Schaffner, H., Shimizu, Y., Steiger, K., Suzuki, H., Takeda, H., Tshoo, K., Vajta, Zs, Wendt, A., Yokoyama, R., and Yoshinaga, K.

Abstract

Newly observed decay schemes of the nuclei Sb137 and Sb138 are reported. The neutron-rich Sb isotopes were produced by the in-flight fragmentation of a U238 primary beam with an energy of 345 MeV/nucleon. Several new excited states of Te137 with tentatively assigned spin-parities of (5/2-), (9/2-), and (7/2) have been established which play an important role in the evolution of neutron levels beyond N=82. The study of the ß decay of Sb138 led to a considerable extension of the level scheme of Te138 including the identification of several nonyrast states. The structure of Te137 and Te138 is discussed on the basis of large-scale shell-model calculations performed using two different effective interactions.

Published
2021

11. $g$ Factor of the $^{99}\mathrm{Zr}$ ($7/{2}^{+}$) Isomer: Monopole Evolution in the Shape-Coexisting Region

Author

Boulay, F., Simpson, G.S., Ichikawa, Y., Kisyov, S., Bucurescu, D., Takamine, A., Ahn, D.S., Asahi, K., Baba, H., Balabanski, D.L., Egami, T., Fujita, T., Fukuda, N., Funayama, C., Furukawa, T., Georgiev, G., Gladkov, A., Hass, M., Imamura, K., Inabe, N., Ishibashi, Y., Kawaguchi, T., Kawamura, T., Kim, W., Kobayashi, Y., Kojima, S., Kusoglu, A., Lozeva, R., Momiyama, S., Mukul, I., Niikura, M., Nishibata, H., Nishizaka, T., Odahara, A., Ohtomo, Y., Ralet, D., Sato, T., Shimizu, Y., Sumikama, T., Suzuki, H., Takeda, H., Tao, L.C., Togano, Y., Tominaga, D., Ueno, H., Yamazaki, H., Yang, X.F., Daugas, J.M., Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Physics
Abstract

International audience; The gyromagnetic factor of the low-lying E=251.96(9) keV isomeric state of the nucleus Zr99 was measured using the time-dependent perturbed angular distribution technique. This level is assigned a spin and parity of Jπ=7/2+, with a half-life of T1/2=336(5) ns. The isomer was produced and spin aligned via the abrasion-fission of a U238 primary beam at RIKEN RIBF. A magnetic moment |μ|=2.31(14)μN was deduced showing that this isomer is not single particle in nature. A comparison of the experimental values with interacting boson-fermion model IBFM-1 results shows that this state is strongly mixed with a main νd5/2 composition. Furthermore, it was found that monopole single-particle evolution changes significantly with the appearance of collective modes, likely due to type-II shell evolution.

Published
2020

12. $\beta$-Decay Half-Lives of 55 Neutron-Rich Isotopes beyond the N=82 Shell Gap

Author

Wu, J., Nishimura, S., Möller, P., Mumpower, M.R., Lozeva, R., Moon, C.B., Odahara, A., Baba, H., Browne, F., Daido, R., Doornenbal, P., Fang, Y.F., Haroon, M., Isobe, T., Jung, H.S., Lorusso, G., Moon, B., Patel, Z., Rice, S., Sakurai, H., Shimizu, Y., Sinclair, L., Söderström, P.-A., Sumikama, T., Watanabe, H., Xu, Z.Y., Yagi, A., Yokoyama, R., Ahn, D.S., Garrote, F.L. Bello, Daugas, J.M., Didierjean, F., Fukuda, N., Inabe, N., Ishigaki, T., Kameda, D., Kojouharov, I., Komatsubara, T., Kubo, T., Kurz, N., Kwon, K.Y., Morimoto, S., Murai, D., Nishibata, H., Schaffner, H., Sprouse, T.M., Suzuki, H., Takeda, H., Tanaka, M., Tshoo, K., Wakabayashi, Y., Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; The $\beta$-decay half-lives of 55 neutron-rich nuclei $^{134-139}$Sn, $^{134-142}$Sb, $^{137-144}$Te, $^{140-146}$I, $^{142-148}$Xe, $^{145-151}$Cs, $^{148-153}$Ba, $^{151-155}$La were measured at the Radioactive Isotope Beam Factory (RIBF) employing the projectile fission fragments of $^{238}$U. The nuclear level structure, which relates to deformation, has a large effect on the half-lives. The impact of newly-measured half-lives on modeling the astrophysical origin of the heavy elements is studied in the context of $r$ process nucleosynthesis. For a wide variety of astrophysical conditions, including those in which fission recycling occurs, the half-lives have an important local impact on the second ($A$ $\approx$ 130) peak.

Published
2020

13. β-decay half-lives of 55 neutron-rich isotopes beyond the N = 82 shell gap

Author

Wu, J., Nishimura, S., Möller, P., Mumpower, M.r., Lozeva, R., Moon, C.B., Odahara, A., Baba, H., Browne, F., Daido, R., Doornenbal, P., Fang, Y. F., Haroon, M., Isobe, T., Jung, H. S., Lorusso, G., Moon, B., Patel, Z., Rice, S., Sakurai, H., Shimizu, Y, Sinclair, L., Söderström, P.-A., Sumikama, T., Watanabe, H., Xu, Z. Y., Yagi, A., Yokoyama, R., Ahn, D. S., Bello Garrote, Frank Leonel, Daugas, J.M., Didierjean, F., Fukuda, N., Inabe, N., Ishigaki, T., Kameda, T., Kojouharov, I., Komatsubara, T., Kubo, T., Kurz, N., Kwon, K. Y., Morimoto, S., Murai, D., Nishibata, H., Schaffner, H., Sprouse, T. M., Suzuki, H., Takeda, H., Tanaka, M., Tshoo, K., and Wakabayashi, Y.

Abstract

The β-decay half-lives of 55 neutron-rich nuclei 134−139Sn, 134−142Sb, 137−144Te, 140−146I, 142−148Xe, 145−151Cs, 148−153Ba, and 151−155La were measured at the Radioactive Isotope Beam Factory employing the projectile fission fragments of 238U. The nuclear level structure, which relates to deformation, has a large effect on the half-lives. The impact of newly measured half-lives on modeling the astrophysical origin of the heavy elements is studied in the context of r process nucleosynthesis. For a wide variety of astrophysical conditions, including those in which fission recycling occurs, the half-lives have an important local impact on the second (A ≈ 130) peak.

Published
2020

14. Isomeric decay of 67Fe --Evidence for deformation

Author

Sawicka, M., Daugas, J.M., Grawe, H., Cwiok, S., Balabanski, D.L., Béraud, R., Bingham, C., Borcea, C., La Commara, M., de France, G., Georgiev, G., Górska, M., Grzywacz, R., Hass, M., Hellström, M., Janas, Z., Lewitowicz, M., Mach, H., Matea, I., Neyens, G., O' Leary, C., de Oliveira Santos, F., Page, R.D., Pfützner, M., Podolyák, Zs., Rykaczewski, K., Stanoiu, M., and Żylicz, J.

Published
2003
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15. Coulomb excitation of 72 30Zn42

Author

Leenhardt, S., Sorlin, O., Porquet, M.G., Azaiez, F., Angélique, J.C., Belleguic, M., Borcea, C., Bourgeois, C., Daugas, J.M., Donzaud, C., Deloncle, I., Duprat, J., Gillibert, A., Grévy, S., Guillemaud-Mueller, D., Kiener, J., Lewitowicz, M., Lukyanov, S.M., Marie, F., Orr, N.A., Penionzhkevich, Yu.-E., de Oliveira Santos, F., Pougheon, F., Saint-Laurent, M.G., Shuying, W., Sobolev, Yu., and Winfield, J.S.

Published
2002
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16. New transitions in the β-decay of 36Ca

Author

López Jiménez, M.J., Saint-Laurent, M.G., Angélique, J.C., Anne, R., Äystö, J., Borcea, C., Daugas, J.M., Guillemaud-Mueller, D., Grévy, S., Grzywacz, R., Jokinen, A., Lewitowicz, M., Nowacki, F., de Oliveira Santos, F., Ostrowski, A.N., Siiskonen, T., and Trinder, W.

Published
2001
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17. Normal and intruder configurations in Si 34 populated in the β- Decay of Mg 34 and Al 34

Author

Lică, R., Rotaru, F., García Borge, María José, Grévy, S., Negoita, F., Poves, Alfredo, Sorlin, O., Andreyev, A. N., Borcea, R., Costache, C., De Witte, H., Fraile, Luis M., Greenlees, P.T., Huyse, M., Ionescu, A., Kisyov, S., Konki, J., Lazarus, I., Madurga, Miguel, Marginean, N., Marginean, R., Mihai, C., Mihai, R.E., Negret, A., Nowacki, F., Page, R. D., Pakarinen, J., Pucknell, V., Rahkila, P., Rapisarda, E., Serban, A., Sotty, C. O., Stan, L., Stanoiu, M., Tengblad, Olof, Turturica, A., Van Duppen, P., Warr, N., Dessagne, P., Stora, T., Borcea, C., Calinescu, S., Daugas, J.M., Filipescu, D., Kuti, I., Franchoo, S., Gheorghe, I., Morfouace, P., Morel, P., Science and Technology Facilities Council (UK), European Commission, Ministerio de Economía y Competitividad (España), National Research, Development and Innovation Office (Hungary), Federal Ministry of Education and Research (Germany), SCOAP, Research Foundation - Flanders, Executive Unit for Financing Higher Education, Research, Development and Innovation (Romania), and Belgian Science Policy Office

Abstract

11 pags., 10 figs., 5 tabs.-- Open Access funded by Creative Commons Atribution Licence 4.0, The structure of Si34 was studied through γ spectroscopy separately in the β- decays of Mg34 and Al34 at the ISOLDE facility of CERN. Different configurations in Si34 were populated independently from the two recently identified β-decaying states in Al34 having spin-parity assignments Jπ=4- dominated by the normal configuration π(d5/2)-1 - ν(f7/2) and Jπ=1+ by the intruder configuration π(d5/2)-1 - ν(d3/2)-1(f7/2)2. The paper reports on spectroscopic properties of Si34 such as an extended level scheme, spin and parity assignments based on log(ft) values and γ-ray branching ratios, absolute β feeding intensities, and neutron emission probabilities. A total of 11 newly identified levels and 26 transitions were added to the previously known level scheme of Si34. Large scale shell-model calculations using the SDPF-U-MIX interaction, able to treat higher order intruder configurations, are compared with the new results and conclusions are drawn concerning the predictive power of SDPF-U-MIX, the N=20 shell gap, the level of mixing between normal and intruder configurations for the 01+, 02+, and 21+ states, and the absence of triaxial deformation in Si34., This work was partially supported by a grant of the Romanian National Authority for Scientific Research and Innovation, CNCS-UEFISCDI project number PN-II-RU-TE- 2014-4-1455, by the Romanian IFA Grant CERN/ISOLDE, by Research Foundation Flanders (FWO-Belgium), by GOA/2015/010 (BOF KU Leuven), and by the Interuniversity Attraction Poles Programme initiated by the Belgian Science Policy Office (BriX network P7/12). Support from the U.K. Science and Technology Facilities Council, the European Union Seventh Framework through ENSAR (Contract No. 262010), the MINECO (Spain) grants FPA2017-87568-P, FPA2015-64969-P, FPA2014-57196, FPA2015-65035-P, Programme “Centros de Excelencia Severo Ochoa” SEV-2016- 0597, the MEYS project SPIRAL2-CZ,EF16-013/0001679, the National Research, Development and Innovation Fund of Hungary via Project No. K128947, the European Regional Development Fund (Contract No. GINOP-2.3.3-15-2016- 00034), the German BMBF under contract 05P18PKCIA (ISOLDE), and “Verbundprojekt 05P2018” is also acknowledged. I.K. was supported by the National Research, Development and Innovation Office of Hungary (NKFIH), Contract No. PD 124717.

Published
2019

18. Normal and intruder configurations in $^{34}$Si populated in the $\beta^-$ decay of $^{34}$Mg and $^{34}$Al

Author

Lica, R., Rotaru, F., Borge, M.J.G., Grevy, S., Negoita, F., Poves, A., Sorlin, O., Andreyev, A.N., Borcea, R., Costache, C., De Witte, H., Fraile, L.M., Greenlees, P.T., Huyse, M., Ionescu, A., Kisyov, S., Konki, J., Lazarus, I., Madurga, M., Marginean, N., Marginean, R., Mihai, C., Mihai, R.E., Negret, A., Nowacki, F., Page, R.D., Pakarinen, J., Pucknell, V., Rahkila, P., Rapisarda, E., Serban, A., Sotty, C.O., Stan, L., Stanoiu, M., Tengblad, O., Turturica, A., Van Duppen, P., Warr, N., Dessagne, Ph., Stora, T., Borcea, C., Calinescu, S., Daugas, J.M., Filipescu, D., Kuti, I., Franchoo, S., Gheorghe, I., Morfouace, P., Morel, P., Mrazek, J., Pietreanu, D., Sohler, D., Stefan, I., Suvaila, R., Toma, S., Ur, C.A., Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), IDS, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear Physics - Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nucl-ex, Nuclear Structure, Nuclear Experiment
Abstract

The structure of Si34 was studied through γ spectroscopy separately in the β− decays of Mg34 and Al34 at the ISOLDE facility of CERN. Different configurations in Si34 were populated independently from the two recently identified β-decaying states in Al34 having spin-parity assignments Jπ=4− dominated by the normal configuration π(d5/2)−1⊗ν(f7/2) and Jπ=1+ by the intruder configuration π(d5/2)−1⊗ν(d3/2)−1(f7/2)2. The paper reports on spectroscopic properties of Si34 such as an extended level scheme, spin and parity assignments based on log(ft) values and γ-ray branching ratios, absolute β feeding intensities, and neutron emission probabilities. A total of 11 newly identified levels and 26 transitions were added to the previously known level scheme of Si34. Large scale shell-model calculations using the SDPF-U-MIX interaction, able to treat higher order intruder configurations, are compared with the new results and conclusions are drawn concerning the predictive power of SDPF-U-MIX, the N=20 shell gap, the level of mixing between normal and intruder configurations for the 01+, 02+, and 21+ states, and the absence of triaxial deformation in Si34. The structure of $^{34}$Si was studied through $\gamma$ spectroscopy separately in the $\beta^-$ decays of $^{34}$Mg and $^{34}$Al at the ISOLDE facility of CERN. Different configurations in $^{34}$Si were populated independently from the two recently identified $\beta$-decaying states in $^{34}$Al having spin-parity assignments $J^\pi = 4^-$ dominated by the normal configuration $\pi (d_{5/2})^{-1} \otimes \nu (f_{7/2})$ and $J^\pi = 1^+$ by the intruder configuration $\pi (d_{5/2})^{-1} \otimes \nu (d_{3/2})^{-1}(f_{7/2})^{2}$. The paper reports on spectroscopic properties of $^{34}$Si such as an extended level scheme, spin and parity assignments based on log($ft$) values and $\gamma$-ray branching ratios, absolute $\beta$ feeding intensities and neutron emission probabilities. A total of 11 newly identified levels and 26 transitions were added to the previously known level scheme of $^{34}$Si. Large scale shell-model calculations using the {\sc sdpf-u-mix} interaction, able to treat higher order intruder configurations, are compared with the new results and conclusions are drawn concerning the predictive power of {\sc sdpf-u-mix}, the $N=20$ shell gap, the level of mixing between normal and intruder configurations for the 0$_1^+$, 0$_2^+$ and 2$_1^+$ states and the absence of triaxial deformation in $^{34}$Si.

Published
2019

20. β-decay studies at the N=28 shell closure: indications for a weakening of the spin-orbit force far from stability ?

Author

Grévy, S., Angélique, J.C., Baumann, P., Borcea, C., Buta, A., Canchel, G., Catford, W.N., Courtin, S., Daugas, J.M., De Oliveira, F., Dessagne, P., Dlouhy, Z., Knipper, A., Kratz, K.L., Lecolley, F.R., Lecouey, J.L., Lehrsenneau, G., Lewitowicz, M., Liénard, E., Lukyanov, S., Maréchal, F., Miehé, C., Mrazek, J., Negoita, F., Orr, N.A., Pantelica, D., Penionzhkevich, Y., Péter, J., Pfeiffer, B., Pietri, S., Poirier, E., Sorlin, O., Stanoiu, M., Stefan, I., Stodel, C., and Timis, C.

Published
2004
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21. Study of neutron rich Carbon and Oxygen nuclei up to drip line

Author

Stanoiu, M., Azaiez, F., Dombrádi, Zs., Sorlin, O., Brown, B.A., Belleguic, M., Sohler, D., Saint Laurent, M.G., Penionzhkevich, Y.E., Sletten, G., Borcea, C., Bourgeois, C., Bracco, A., Daugas, J.M., Dlouhý, Z., Donzaud, C., Fülöp, Zs., Guillemaud-Mueller, D., Grévy, S., Ibrahim, F., Kerek, A., Krasznahorkay, A., Lewitowicz, M., Lukyanov, S., Mayet, P., Mandal, S., Mittig, W., Mrázek, J., Negoita, F., De Oliveira-Santos, F., Podolyák, Zs., Pougheon, F., Roussel-Chomaz, P., Savajols, H., Sobolev, Y., Stodel, C., Timár, J., and Yamamoto, A.

Published
2004
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22. Study of neutron-rich argon isotopes in β-decay

Author

Mrázek, J, Grévy, S, Iulian, S, Buta, A, Negoita, F, Angélique, J.C, Baumann, P, Borcea, C, Canchel, G, Catford, W, Courtin, S, Daugas, J.M, Dlouhý, Z, Dessagne, P, Knipper, A, Lehrsenneau, G, Lecolley, F.R, Lecouey, J.L, Lewitowicz, M, Liénard, E, Lukyanov, S, Maréchal, F, Miehe, C, de Oliveira, F, Orr, N.A, Pantelica, D, Penionzhkevich, Y, Peter, J, Pietri, S, Poirier, E, Sorlin, O, Stanoiu, M, Stodel, O, Tarasov, O, and Timis, C

Published
2004
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23. Spectroscopy at the N=20 shell closure: the β-decay of 32Mg

Author

Gre´vy, S., Pietri, S., Achouri, L., Ange´lique, J.C., Baumann, P., Borcea, C., Buta, A., Catford, W., Courtin, S., Daugas, J.M., De Oliveira, F., Dessagne, P., Dlouhy, Z., Mueller, D. Guillemaud, Hadeler, R., Knipper, A., Lecolley, F.R., Lecouey, J.L., Lewitowicz, M., Lie´nard, E., Miehe, C., Mrazek, J., Negoita, F., Orr, N.A., Penionzhkevich, Y., Peter, J., Poirier, E., Stanoiu, M., Tarasov, O., Timis, C., and Walter, G.

Published
2004
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24. Nuclear moments of the low-lying isomeric 1+ state of 34Al: Investigation on the neutron 1p1h excitation across N = 20 in the island of inversion

Author

Xu, Z.Y., Heylen, H., Asahi, K., Boulay, F., Daugas, J.M., de Groote, R.P., Gins, W., Kamalou, O., Koszorús, Á., Lykiardopoulou, M., Mertzimekis, T.J., Neyens, G., Nishibata, H., Otsuka, T., Orset, R., Poves, A., Sato, T., Stodel, C., Thomas, J.C., Tsunoda, N., Utsuno, Y., Vandebrouck, M., and Yang, X.F.

Published
2018
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26. Neutron-induced cross sections of short-lived nuclei via the surrogate reaction method

Author

Tassan-Got L., Gunsing F., Sérot O., Matea I., Théroine C., Derkx X., Romain P., Taieb J., Morel P., Pillet N., Gaudefroy L., Faul T., Daugas J.M., Bauge E., Burke J.T., Czajkowski S., Companis I., Capellan N., Barreau G., Mathieu L., Aïche M., Roig O., Méot V., Jurado B., and Boutoux G.

Subjects
Physics, QC1-999
Abstract

The measurement of neutron-induced cross sections of short-lived nuclei is extremely difficult due to the radioactivity of the samples. The surrogate reaction method is an indirect way of determining cross sections for nuclear reactions that proceed through a compound nucleus. This method presents the advantage that the target material can be stable or less radioactive than the material required for a neutron-induced measurement. We have successfully used the surrogate reaction method to extract neutron-induced fission cross sections of various short-lived actinides. In this work, we investigate whether this technique can be used to determine neutron-induced capture cross sections in the rare-earth region.

Published
2012
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27. Nuclear moments of the low-lying isomeric 1 State of Al: Investigation on the neutron 1 1 Excitation Across = 20 in the Island of Inversion

Author

Xu, Z.Y., Heylen, H., Asahi, K., Boulay, F., Daugas, J.M., de Groote, R.P., Gins, W., Kamalou, O., Koszorús, Á., Lykiardopoulou, M., Mertzimekis, T.J., Neyens, G., Nishibata, H., Otsuka, T., Orset, R., Poves, A., Sato, T., Stodel, C., Thomas, J.C., Tsunoda, N., Utsuno, Y., Vandebrouck, M., and Yang, X.F.

Abstract

The nuclear g factor and quadrupole moment (Qs) have been measured for the low-lying isomeric 1+ state of $^{34}$Al, using the β-detected nuclear magnetic resonance (β-NMR) and quadrupole resonance (β-NQR) methods. Spin-polarized $^{34}$Al isotopes were produced in a one-neutron pickup reaction induced by a $^{36}$S beam on a $^{9}$Be target at a kinetic energy of 77.5 MeV/nucleon, and were collected with the LISE fragment separator at GANIL. The measured g factor (|g| in a range of 1.757±0.014) and quadrupole moment (|Qs|=38(5) mb) are in good agreement with shell-model calculations using effective interactions. The similarity between the g factor of 34mAl and that of $^{32}$Al confirms a dominant neutron 2p1h configuration π(d5/2)−1⊗ν(d3/2)−1(f7/2)2 of 34mAl. In addition, the enhanced quadrupole moment of 34mAl relative to that of $^{32}$Al suggests that the neutron 1p1h excitation across the N=20 shell gap introduces extra nucleon–nucleon correlation and deformation.

Published
2018

28. Nuclear moments of the low-lying isomeric 1+ state of 34Al: Investigation on the neutron 1p1h excitation across N = 20 in the island of inversion

Author

Xu, Z.Y. Heylen, H. Asahi, K. Boulay, F. Daugas, J.M. de Groote, R.P. Gins, W. Kamalou, O. Koszorús, Á. Lykiardopoulou, M. Mertzimekis, T.J. Neyens, G. Nishibata, H. Otsuka, T. Orset, R. Poves, A. Sato, T. Stodel, C. Thomas, J.C. Tsunoda, N. Utsuno, Y. Vandebrouck, M. Yang, X.F.

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

The nuclear g factor and quadrupole moment (Qs) have been measured for the low-lying isomeric 1+ state of 34Al, using the β-detected nuclear magnetic resonance (β-NMR) and quadrupole resonance (β-NQR) methods. Spin-polarized 34Al isotopes were produced in a one-neutron pickup reaction induced by a 36S beam on a 9Be target at a kinetic energy of 77.5 MeV/nucleon, and were collected with the LISE fragment separator at GANIL. The measured g factor (|g| in a range of 1.757±0.014) and quadrupole moment (|Qs|=38(5) mb) are in good agreement with shell-model calculations using effective interactions. The similarity between the g factor of 34mAl and that of 32Al confirms a dominant neutron 2p1h configuration π(d5/2)−1⊗ν(d3/2)−1(f7/2)2 of 34mAl. In addition, the enhanced quadrupole moment of 34mAl relative to that of 32Al suggests that the neutron 1p1h excitation across the N=20 shell gap introduces extra nucleon–nucleon correlation and deformation. © 2018 The Author(s)

Published
2018

29. Neutron-induced cross sections of short-lived nuclei via the surrogate reaction method

Author

Morel P., Gaudefroy L., Faul T., Daugas J.M., Bauge E., Burke J.T., Czajkowski S., Companis I., Capellan N., Barreau G., Mathieu L., Aïche M., Roig O., Méot V., Jurado B., Boutoux G., Pillet N., Romain P., Taieb J., Théroine C., Derkx X., Sérot O., Matea I., Tassan-Got L., and Gunsing F.

Subjects
Physics, QC1-999
Abstract

The measurement of neutron-induced cross sections of short-lived nuclei is extremely difficult due to the radioactivity of the samples. The surrogate reaction method is an indirect way of determining cross sections for nuclear reactions that proceed through a compound nucleus. This method presents the advantage that the target material can be stable or less radioactive than the material required for a neutron-induced measurement. We have successfully used the surrogate reaction method to extract neutron-induced fission cross sections of various short-lived actinides. In this work, we investigate whether this technique can be used to determine neutron-induced capture cross sections in the rare-earth region.

Published
2011
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30. Neutron-induced capture cross sections via the surrogate reaction method

Author

Pillet N., Morel P., Méot V., Gaudefroy L., Faul T., Daugas J.M., Bauge E., Bail A., Mathieu L., Haas B., Dassié D., Czajkowski S., Companis I., Capellan N., Barreau G., Jurado B., Boutoux G., Aïche M., Roig O., Taieb J., Théroine C., Sérot O., Gunsing F., Burke J.T., Derkx X., and Tassan-Got L.

Subjects
Physics, QC1-999
Abstract

The surrogate reaction method is an indirect way of determining cross sections for nuclear reactions that proceed through a compound nucleus. In this method, the compound nucleus is produced via an alternative (surrogate) reaction and its decay (by fission, gamma or neutron emission) is measured in coincidence with the outgoing appropriate charged particle. This technique has enabled neutron-induced cross sections to be extracted for nuclear reactions on short-lived nuclei that otherwise could not be measured. The CENBG collaboration has successfully applied this technique to determine the neutron-induced fission cross sections of several short-lived nuclei such as 233Pa, 242,243Cm and 241Am. These data are very important for the development of the Th/U cycle and for minor actinide transmutation. We currently investigate whether this powerful technique can also be used to determine the neutron-induced capture cross sections. For this purpose we will use the surrogate reaction 174Yb(3He,pγ)176Lu to infer the well known 175Lu(n,γ) cross section and compare the results with the directly measured neutron-induced data. The experimental set-up and the first results will be presented. We will also discuss our future plans to use the surrogate method for extracting actinides (n,γ) cross sections.

Published
2010
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31. g-factors of isomers around N≈40, Z≈28 from time-dependent Larmor precession on spin-aligned projectile-like fragments

Author

Neyens, G., Georgiev, G., Grzywacz, R., Hass, M., de Oliveira Santos, F., Lewitowicz, M., Balabanski, D.L., Bingham, C., Borcea, C., Coulier, N., Coussement, R., Daugas, J.M., Defrance, G., Goldring, G., Górska, M., Grawe, H., O'Leary, C., Macovei, I., Mach, H., Page, R., Pfützner, M., Penionzkevich, Yu.-E., Podolyak, Z., Regan, P.H., Rykaczewski, K., Sawicka, M., Smirnova, N.A., Sobolev, Yu., Teughels, S., and Vyvey, K.

Published
2002
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35. Spin-alignment in abrasion-fission reaction – g-factor measurement of isomeric states

Author

Daugas, J.M., Boulay, F., Simpson, G.S., Ichikawa, Y., Ahn, D.S., Balabanski, D.L., Egami, T., Fujita, T., Fukuda, N., Funayama, C., Furukawa, T., Georgiev, G., Gladkov, A., Hass, M., Imamura, K., Inabe, N., Ishibashi, Y., Kawaguchi, T., Kawamura, T., Kim, W., Kobayashi, Y., Kojima, S., Kusoglu, A., Momiyama, S., Mukul, I., Niikura, M., Nishibata, H., Nishizaka, T., Odahara, A., Ohtomo, Y., Ralet, D., Sato, T., Shimizu, Y., Shimoda, T., Sumikama, T., Suzuki, H., Takeda, H., Tao, L.C., Togano, Y., Tominaga, D., Ueno, H., Yamazaki, H., Yang, X.F., Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Centre National de la Recherche Scientifique (CNRS), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; The spin-alignment of fragments produced in spontaneous and neutroninducedfission reactions is found to be up to 40%. This amount of spin-alignmentallows the measurement of gyromagnetic factors of s isomeric states using the wellknown TDPAD method. This observable is a very sensitive probe of the singleparticlestructure of nuclear states and frequently allows one to determine thevalence nucleon configuration. Isomers produced by spontaneous fission are difficultto measure due to their low production rates and the ones produced by neutroninducedfission and selected in a spectrometer could not be measured because oneneeds to have fully stripped isotopes to preserve the spin-alignment in the vacuum.The measurement performed at the RIKEN Nishina Center accelerator usingthe abrasion-fission reaction of a 238U80+ beam at 345 MeV/u energy on the N=5999mZr and 98mY will be presented. The obtained results show the opportunity toperform gyromagnetic factors measurement of neutron-rich s-isomers produced bythe abrasion-fission reaction.

Published
2017

36. Nuclear structure and β -decay schemes for Te nuclides beyond N=82

Author

Moon, B., Moon, C.B., Söderström, P.A., Odahara, A., Lozeva, R., Hong, B., Browne, F., Jung, H.S., Lee, P., Lee, C.S., Yagi, A., Yuan, C., Nishimura, S., Doornenbal, P., Lorusso, G., Sumikama, T., Watanabe, H., Kojouharov, I., Isobe, T., Baba, H., Sakurai, H., Daido, R., Fang, Y., Nishibata, H., Patel, Z., Rice, S., Sinclair, L., Wu, J., Xu, Z.Y., Yokoyama, R., Kubo, T., Inabe, N., Suzuki, H., Fukuda, N., Kameda, D., Takeda, H., Ahn, D.S., Shimizu, Y., Murai, D., Bello Garrote, F.L., Daugas, J.M., Didierjean, F., Ideguchi, E., Ishigaki, T., Morimoto, S., Niikura, M., Nishizuka, I., Komatsubara, T., Kwon, Y.K., Tshoo, K., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Sciences Nucléaires et de Sciences de la Matière ( CSNSM ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Institut Pluridisciplinaire Hubert Curien ( IPHC ), Centre National de la Recherche Scientifique ( CNRS ) -Université de Strasbourg ( UNISTRA ), Direction des Applications Militaires ( DAM ), and Commissariat à l'énergie atomique et aux énergies alternatives ( CEA )

Subjects
27.60.+j, Astrophysics::High Energy Astrophysical Phenomena, 21.60.Cs, 21.10.Re, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, 23.40.-s
Abstract

International audience; We study for the first time the internal structure of Te140 through the β-delayed γ-ray spectroscopy of Sb140. The very neutron-rich Sb140 nuclei with Z=51 and N=89 were produced by the in-flight fission of U238 beams at the Radioactive Isotope Beam Factory, RIKEN. The half-life and spin-parity of Sb140 are reported as 173±12 ms and 3−, respectively. In addition to the excited states of Te140 produced by the β-decay branch, the β-delayed one-neutron and two-neutron emission branches were also established. By identifying the first 2+ and 4+ excited states of Te140, we found that Te isotopes persist in their vibrator character with E(4+)/E(2+)=2. We discuss the distinctive features manifest in this region revealed in pairs of isotopes with the same neutron holes and particles with respect to N=82.

Published
2017

37. The 8 + isomer in 78Zn and the doubly magic character of 78Ni

Author

Daugas, J.M., Grzywacz, R., Lewitowicz, M., Achouri, L., Angélique, J.C., Baiborodin, D., Bennaceur, K., Bentida, R., Béraud, R., Borcea, C., Bingham, C., Catford, W.N., Emsallem, A., de France, G., Grawe, H., Jones, K.L., Lemmon, R.C., Lopez Jimenez, M.J., Nowacki, F., de Oliveira Santos, F., Pfützner, M., Regan, P.H., Rykaczewski, K., Sauvestre, J.E., Sawicka, M., Sletten, G., and Stanoiu, M.

Published
2000
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38. An above-barrier narrow resonance in 15F

Author

de Grancey, F., Mercenne, A., de Oliveira Santos, F., Davinson, T., Sorlin, O., Angélique, J.C., Assié, M., Berthoumieux, E., Borcea, R., Buta, A., Celikovic, I., Chudoba, V., Daugas, J.M., Dumitru, G., Fadil, M., Grévy, S., Kiener, J., Lefebvre-Schuhl, A., Michel, N., Mrazek, J., Negoita, F., Okołowicz, J., Pantelica, D., Pellegriti, M.G., Perrot, L., Płoszajczak, M., Randisi, G., Ray, I., Roig, O., Rotaru, F., Saint Laurent, M.G., Smirnova, N., Stanoiu, M., Stefan, I., Stodel, C., Subotic, K., Tatischeff, V., Thomas, J.C., Ujić, P., and Wolski, R.

Published
2016
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39. Corrigendum to: “Shape dynamics in neutron-rich Kr isotopes: Coulomb excitation of 92Kr, 94Kr and 96Kr” [Nucl. Phys. A 899 (2013) 1–28]

Author

Albers, M., Nomura, K., Warr, N., Blazhev, A., Jolie, J., Mücher, D., Bastin, B., Bauer, C., Bernards, C., Bettermann, L., Bildstein, V., Butterworth, J., Cappellazzo, M., Cederkäll, J., Cline, D., Darby, I., Das Gupta, S., Daugas, J.M., Davinson, T., De Witte, H., Diriken, J., Filipescu, D., Fiori, E., Fransen, C., Gaffney, L.P., Georgiev, G., Gernhäuser, R., Hackstein, M., Heinze, S., Hess, H., Huyse, M., Jenkins, D., Konki, J., Kowalczyk, M., Kröll, T., Krücken, R., Litzinger, J., Lutter, R., Marginean, N., Mihai, C., Moschner, K., Napiorkowski, P., Nara Singh, B.S., Nowak, K., Pakarinen, J., Pfeiffer, M., Radeck, D., Reiter, P., Rigby, S., Robledo, L.M., Rodríguez-Guzmán, R., Rudigier, M., Scheck, M., Seidlitz, M., Siebeck, B., Simpson, G., Thöle, P., Thomas, T., Van de Walle, J., Van Duppen, P., Vermeulen, M., Voulot, D., Wadsworth, R., Wenander, F., Wimmer, K., Zell, K.O., and Zielinska, M.

Published
2016
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40. β-decay of [formula omitted]Ca

Author

Trinder, W, Angélique, J.C, Anne, R, Äystö, J, Borcea, C, Daugas, J.M, Guillemaud-Mueller, D, Grévy, S, Grzywacz, R, Jokinen, A, Lewitowicz, M, Lopez, M.J, de Oliveira, F, Ostrowski, A.N, Siiskonen, T, and Saint-Laurent, M.G

Published
1999
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41. Study of μs-isomers in neutron-rich nuclei around Z=28 and N=40 shell closures

Author

Lewitowicz, M., Daugas, J.M., Grzywacz, R., Achouri, L., Angélique, J.C., Baiborodin, D., Bentida, R., Béraud, R., Bingham, C., Borcea, C., Catford, W., Emsallem, A., de France, G., Glogowski, M., Grawe, H., Guillemaud-Mueller, D., Houry, M., Hurskanen, S., Jones, K.L., Lemmon, R.C., Mueller, A.C., Nowak, A., de Oliveira-Santos, F., Płochocki, A., Pfützner, M., Regan, P.H., Rykaczewski, K., Saint-Laurent, M.G., Sauvestre, J.E., Sawicka, M., Schaefer, M., Sletten, G., Sorlin, O., Stanoiu, M., Szerypo, J., Trinder, W., Viteritti, S., and Winfield, J.

Published
1999
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42. Subshell closure study at N=40 by coulomb excitation and β-decay

Author

Leenhardt, S., Azaiez, F., Sorlin, O., Belleguic, M., Bourgeois, C., Donzaud, C., Duprat, J., Grévy, S., Guillemaud-Mueller, D., Mueller, A.C., Pougheon, F., Deloncle, I., Kiener, J., Porquet, M.G., Daugas, J.M., Lewitowicz, M., de Oliveira, F., Saint-Laurent, M.G., Winfield, J., Angélique, J.C., Orr, N., Gillibert, A., Marie, F., Borcea, C., Penionzhkevich, Yu-E., Sobolev, Yu., Béraud, R., Canchel, G., Chabanat, E., Emsalem, A., Longour, C., and Sauvestre, J.E.

Published
1999
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44. High-precision quadrupole moment reveals significant intruder component in $^{33}_{13}$Al$_{20}$ ground state

Author

Heylen, H., De Rydt, M., Neyens, G., Bissell, M.L., Caceres, L., Chevrier, Rémy, Daugas, J.M., Ichikawa, Y., Ishibashi, Y., Kamalou, O., Mertzimekis, T.J., Morel, Pierre, Papuga, J., Poves, A., Rajabali, M.M., Stodel, C., Thomas, J.C., Ueno, H., Utsuno, Y., Yoshida, N., Yoshimi, A., Instituut voor Kern- en Stralingsfysica (K.U. LEUVEN), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), RIKEN Nishina Center for Accelerator-Based Science [Wako] (RIKEN RNC), RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN), National and Kapodistrian University of Athens (NKUA), Instituto de Física Teórica UAM/CSIC (IFT), Universidad Autonoma de Madrid (UAM)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Center for Nuclear Study, The University of Tokyo (UTokyo), Department of Physics, Tokyo Institute of Technology (TOKYO INSTITUTE OF TECHNOLOGY), Tokyo Institute of Technology [Tokyo] (TITECH), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Universidad Autónoma de Madrid (UAM)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)

Subjects
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

6 pages, 4 figures. Accepted for publication in Physical Review C, expérience GANIL/LISE; International audience; The electric quadrupole moment of the 33Al20 ground state, located at the border of the island of inversion, was obtained using continuous-beam beta-detected nuclear quadrupole resonance (beta-NQR). From the measured quadrupole coupling constant Q = 2.31(4) MHz in an alpha-Al2O3 crystal, a precise value for the electric quadrupole moment is extracted: Qs= 141(3) mb. A comparison with large-scale shell model calculations shows that 33Al has at least 50% intruder configurations in the ground state wave function, favoring the excitation of two neutrons across the N = 20 shell gap. 33Al therefore clearly marks the gradual transition north of the deformed Na and Mg nuclei towards the normal Z>14 isotopes.

Published
2016

45. Nearly degenerate isomeric states of $^{75}$Cu

Author

Petrone, C., Daugas, J.M., Simpson, G.S., Stanoiu, M., Plaisir, C., Faul, T., Borcea, C., Borcea, R., Caceres, L., Calinescu, S., Chevrier, Rémy, Gaudefroy, L., Georgiev, G., Gey, G., Kamalou, O., Negoita, F., Rotaru, F., Sorlin, O., Thomas, J.C., Horia Hulubei National Institute of Physics and Nuclear Engineering (NIPNE), IFIN-HH, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th]
Abstract

Expérience GANIL/LISE2000; International audience; The decays of two isomeric states in the neutron-rich nucleus Cu75 have been studied via delayed γ-ray spectroscopy. These states were populated by the fragmentation of a 60.4AMeV Kr86 primary beam, which impinged on a Be target at the LISE2k spectrometer of GANIL. Isomeric half-lives and branching ratios were measured, and a γ−γ coincidence analysis performed. These have allowed a revised level scheme of Cu75 to be proposed. A comparison with large-scale shell-model calculations using different effective interactions and valence spaces shows the importance of proton excitations across the Z=28 shell gap for reproducing the energy spacing between the isomeric states. The coexisting collective and single-particle properties of the (1/2−) and (3/2−) states, respectively, are similar to those of the same states in the neighboring Cu69,71,73. The small energy spacings between the (1/2−), (3/2−), and 5/2− states are responsible for the isomerism.

Published
2016

46. High-precision quadrupole moment reveals significant intruder component in Al20 1333 ground state

Author

Heylen, H. De Rydt, M. Neyens, G. Bissell, M.L. Caceres, L. Chevrier, R. Daugas, J.M. Ichikawa, Y. Ishibashi, Y. Kamalou, O. Mertzimekis, T.J. Morel, P. Papuga, J. Poves, A. Rajabali, M.M. Stödel, C. Thomas, J.C. Ueno, H. Utsuno, Y. Yoshida, N. Yoshimi, A.

Subjects
Nuclear Theory
Abstract

The electric quadrupole moment of the Al201333 ground state, located at the border of the island of inversion, was obtained using continuous-beam β-detected nuclear quadrupole resonance (β-NQR). From the measured quadrupole coupling constant νQ=2.31(4) MHz in an α-Al2O3 crystal, a precise value for the electric quadrupole moment is extracted: QsAl33=141(3) mb. A comparison with large-scale shell model calculations shows that Al33 has at least 50% intruder configurations in the ground state wave function, favoring the excitation of two neutrons across the N=20 shell gap. Al33 therefore clearly marks the gradual transition north of the deformed Na and Mg nuclei towards the normal Z≥14 isotopes. © 2016 American Physical Society.

Published
2016

47. Erosion of N=20 shell in Al33 investigated through the ground-state electric quadrupole moment

Author

Shimada, K., Ueno, H., Neyens, G., Asahi, K., Balabanski, D.L., Daugas, J.M., Depuydt, M., De Rydt, M., Gaudefroy, L., Grévy, S., Hasama, Y., Ichikawa, Y., Kameda, D., Morel, P., Nagatomo, T., Perrot, L., Stodel, Ch., Thomas, J.-C., Utsuno, Y., Vanderheijden, W., Vermeulen, N., Vingerhoets, P., Yagi, E., Yoshida, K., and Yoshimi, A.

Subjects
Nuclear and High Energy Physics, Nuclear Theory
Published
2012
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48. g Factor of the 7− isomer in 126Sn and first observation of spin-alignment in relativistic fission

Author

Ilie, G., Neyens, G., Simpson, G.S., Jolie, J., Blazhev, A., Grawe, H., Lozeva, R.L., Vermeulen, N., Atanasova, L., Balabanski, D.L., Becker, F., Bednarczyk, P., Brandau, C., Caceres, L., Chamoli, S.K., Daugas, J.M., Doornenbal, P., Gerl, J., Górska, M., Grȩbosz, J., Hass, M., Ionescu-Bujor, M., Jungclaus, A., Kmiecik, M., Kojouharov, I., Kurz, N., Maj, A., Mallion, S., Perru, O., Pfützner, M., Podolyák, Zs., Prokopowicz, W., De Rydt, M., Saito, T.R., Schaffner, H., Turzó, K., Walker, J., Werner-Malento, E., and Wollersheim, H.J.

Subjects
Nuclear and High Energy Physics
Published
2010
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50. Probing Nuclear forces beyond the drip-line using the mirror nuclei $^{16}$N and $^{16}$F

Author

Stefan, I., de Oliveira Santos, Francois, Sorlin, O., Davinson, T., Lewitowicz, M., Dumitru, G., Angélique, J.C., Angélique, M., Berthoumieux, E., Borcea, C., Borcea, R., Buta, A., Daugas, J.M., De Grancey, F., Fadil, M., Grévy, S., Kiener, J., Lefebvre-Schuhl, A., Lenhardt, M., Mrazek, J., Negoita, F., Pantelica, D., Pellegriti, M.G., Perrot, L., Ploszajczak, M., Roig, O., Saint-Laurent, M.G., Ray, I., Stanoiu, M., Stodel, C., Tatischeff, V., Thomas, J.C., Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), SUPA School of Physics and Astronomy [Edinburgh], University of Edinburgh, Horia Hulubei National Institute of Physics and Nuclear Engineering (NIPNE), IFIN-HH, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CSNSM AN, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Nuclear Physics Institute, ASCR Rez, AS CR, Rez, Czech Republic, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM)

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex), 25.60.-t,97.10.Cv,25.70.Ef,25.40.Cm,21.10.-k,27.20.+n, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

Radioactive beams of $^{14}$O and $^{15}$O were used to populate the resonant states 1/2$^+$, 5/2$^+$ and $0^-,1^-,2^-$ in the unbound $^{15}$F and $^{16}$F nuclei respectively by means of proton elastic scattering reactions in inverse kinematics. Based on their large proton spectroscopic factor values, the resonant states in $^{16}$F can be viewed as a core of $^{14}$O plus a proton in the 2s$_{1/2}$ or 1d$_{5/2}$ shell and a neutron in 1p$_{1/2}$. Experimental energies were used to derive the strength of the 2s$_{1/2}$-1p$_{1/2}$ and 1d$_{5/2}$-1p$_{1/2}$ proton-neutron interactions. It is found that the former changes by 40% compared with the mirror nucleus $^{16}$N, and the second by 10%. This apparent symmetry breaking of the nuclear force between mirror nuclei finds explanation in the role of the large coupling to the continuum for the states built on an $\ell=0$ proton configuration., Comment: 6 pages, 3 figures, 2 tables, accepted for publication as a regular article in Physical Review C

Published
2014

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