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1. Magicity versus superfluidity around $^{28}$O viewed from the study of $^{30}$F

Author

Kahlbow, J., Aumann, T., Sorlin, O., Kondo, Y., Nakamura, T., Nowacki, F., Revel, A., Achouri, N. L., Falou, H. Al, Atar, L., Baba, H., Boretzky, K., Caesar, C., Calvet, D., Chae, H., Chiga, N., Corsi, A., Delaunay, F., Delbart, A., Deshayes, Q., Dombradi, Z., Douma, C. A., Elekes, Z., Gasparic, I., Gheller, J. -M., Gibelin, J., Gillibert, A., Harakeh, M. N., Hirayama, A., Holl, M., Horvat, A., Horvath, A., 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., Marques, F. M., Masuoka, S., Mayer, J., Miki, K., Murakami, T., Najafi, M., Nakano, K., Nakatsuka, N., Nilsson, T., Obertelli, A., Orr, N. A., Otsu, H., Ozaki, T., Panin, V., Paschalis, S., Rossi, D. M., Saito, A. T., Saito, T., Sasano, M., Sato, H., Satou, Y., Scheit, H., Schindler, F., Schrock, P., Shikata, M., Shimada, K., 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., Wang, H., Yang, Z., Yasuda, M., and Yoneda, K.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The neutron-rich unbound fluorine isotope $^{30}$F$_{21}$ has been observed for the first time by measuring its neutron decay at the SAMURAI spectrometer (RIBF, RIKEN) in the quasi-free proton knockout reaction of $^{31}$Ne nuclei at 235 MeV/nucleon. The mass and thus one-neutron-separation energy of $^{30}$F has been determined to be $S_n = -472\pm 58 \mathrm{(stat.)} \pm 33 \mathrm{(sys.)}$ keV from the measurement of its invariant-mass spectrum. The absence of a sharp drop in $S_n$($^{30}$F) shows that the ``magic'' $N=20$ shell gap is not restored close to $^{28}$O, which is in agreement with our shell-model calculations that predict a near degeneracy between the neutron $d$ and $fp$ orbitals, with the $1p_{3/2}$ and $1p_{1/2}$ orbitals becoming more bound than the $0f_{7/2}$ one. This degeneracy and reordering of orbitals has two potential consequences: $^{28}$O behaves like a strongly superfluid nucleus with neutron pairs scattering across shells, and both $^{29,31}$F appear to be good two-neutron halo-nucleus candidates., Comment: 9 pages, 2 figures, accepted for publication in Physical Review Letters

Published
2024
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2. Validation of the $^{10}\mathrm{Be}$ Ground-State Molecular Structure Using $^{10}\mathrm{Be}(p,p\alpha)^{6}\mathrm{He}$ Triple Differential Reaction Cross-Section Measurements

Author

Li, P. J., Beaumel, D., Lee, J., Assié, M., Chen, S., Franchoo, S., Gibelin, J., Hammache, F., Harada, T., Kanada-En'yo, Y., Kubota, Y., Leblond, S., Liang, P. F., Lokotko, T., Lyu, M., Marqués, F. M., Matsuda, Y., Ogata, K., Otsu, H., Rindel, E., Stuhl, L., Suzuki, D., Togano, Y., Tomai, T., Xu, X. X., Yoshida, K., Zenihiro, J., Achouri, N. L., Aumann, T., Baba, H., Cardella, G., Ceruti, S., Stefanescu, A. I., Corsi, A., Frotscher, A., Gao, J., Gillibert, A., Inaba, K., Isobe, T., Kawabata, T., Kitamura, N., Kobayashi, T., Kondo, Y., Kurihara, A., Liu, H. N., Miki, H., Nakamura, T., Obertelli, A., Orr, N. A., Panin, V., Sasano, M., Shimada, T., Sun, Y. L., Tanaka, J., Trache, L., Tudor, D., Uesaka, T., Wang, H., Yamada, H., Yang, Z. H., and Yasuda, M.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The cluster structure of the neutron-rich isotope $^{10}$Be has been probed via the $(p,p\alpha)$ reaction at 150 MeV/nucleon in inverse kinematics and in quasifree conditions. The populated states of $^{6}$He residues were investigated through missing mass spectroscopy. The triple differential cross-section for the ground-state transition was extracted for quasifree angle pairs ($\theta_{p}$, $\theta_{\alpha}$) and compared to distorted-wave impulse approximation reaction calculations performed in a microscopic framework using successively the Tohsaki-Horiuchi-Schuck-R\"opke product wave-function and the wave-function deduced from Antisymmetrized Molecular Dynamics calculations. The remarkable agreement between calculated and measured cross-sections in both shape and magnitude validates the molecular structure description of the $^{10}$Be ground-state, configured as an $\alpha$-$\alpha$ core with two valence neutrons occupying $\pi$-type molecular orbitals., Comment: 7 pages, 3 figures, 1 tables

Published
2023
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3. Intruder configurations in $^{29}$Ne at the transition into the island of inversion: Detailed structure study of $^{28}$Ne

Author

Wang, H., Yasuda, M., Kondo, Y., Nakamura, T., Tostevin, J. A., Ogata, K., Otsuka, T., Poves, A., Shimizu, N., Yoshida, K., Achouri, N. L., Falou, H. Al, 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, Zs., Douma, C., Elekes, Z., Fallon, P., Gašparić, I., Gheller, J. -M., Gibelin, J., Gillibert, A., Harakeh, M. N., Hirayama, A., Hoffman, C. R., Holl, M., Horvat, A., Horváth, Á., Hwang, J. W., Isobe, T., Kahlbow, J., Kalantar-Nayestanaki, N., Kawase, S., Kim, S., Kisamori, K., Kobayashi, T., Körper, D., Koyama, S., Kuti, I., Lapoux, V., Lindberg, S., Marqués, F. M., Masuoka, S., Mayer, J., Miki, K., Murakami, T., Najafi, M. A., Nakano, K., Nakatsuka, N., Nilsson, T., Obertelli, A., Santos, F. de Oliveira, Orr, N. A., Otsu, H., Ozaki, T., Panin, V., Paschalis, S., Revel, A., 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., Sorlin, O., Stuhl, L., Takeuchi, S., Tanaka, M., Thoennessen, M., Törnqvist, H., Togano, Y., Tomai, T., Tscheuschner, J., Tsubota, J., Uesaka, T., Yang, Z., and Yoneda, K.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

Detailed $\gamma$-ray spectroscopy of the exotic neon isotope $^{28}$Ne has been performed for the first time using the one-neutron removal reaction from $^{29}$Ne on a liquid hydrogen target at 240~MeV/nucleon. Based on an analysis of parallel momentum distributions, a level scheme with spin-parity assignments has been constructed for $^{28}$Ne and the negative-parity states are identified for the first time. The measured partial cross sections and momentum distributions reveal a significant intruder $p$-wave strength providing evidence of the breakdown of the $N=20$ and $N=28$ shell gaps. Only a weak, possible $f$-wave strength was observed to bound final states. Large-scale shell-model calculations with different effective interactions do not reproduce the large $p$-wave and small $f$-wave strength observed experimentally, indicating an ongoing challenge for a complete theoretical description of the transition into the island of inversion along the Ne isotopic chain.

Published
2023
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4. STRASSE: A Silicon Tracker for Quasi-free Scattering Measurements at the RIBF

Author

Liu, H. N., Flavigny, F., Baba, H., Boehmer, M., Bonnes, U., Borshchov, V., Doornenbal, P., Ebina, N., Enciu, M., Frotscher, A., Gernhäuser, R., Girard-Alcindor, V., Goupillière, D., Heuser, J., Kapell, R., Kondo, Y., Lee, H., Lehnert, J., Matsui, T., Matta, A., Nakamura, T., Obertelli, A., Pohl, T., Protsenko, M., Sasano, M., Satou, Y., Schmidt, C. J., Schünemann, K., Simons, C., Sun, Y. L., Tanaka, J., Togano, Y., Tomai, T., Tymchuk, I., Uesaka, T., Visinka, R., Wang, H., and Wienholtz, F.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

STRASSE (Silicon Tracker for RAdioactive nuclei Studies at SAMURAI Experiments) is a new detection system under construction for quasi-free scattering (QFS) measurements at 200-250 MeV/nucleon at the RIBF facility of the RIKEN Nishina Center. It consists of a charged-particle silicon tracker coupled with a dedicated thick liquid hydrogen target (up to 150-mm long) in a compact geometry to fit inside large scintillator or germanium arrays. Its design was optimized for two types of studies using QFS: missing-mass measurements and in-flight prompt $\gamma$-ray spectroscopy. This article describes (i) the resolution requirements needed to go beyond the sensitivity of existing systems for these two types of measurements, (ii) the conceptual design of the system using detailed simulations of the setup and (iii) its complete technical implementation and challenges. The final tracker aims at a sub-mm reaction vertex resolution and is expected to reach a missing-mass resolution below 2 MeV in $\sigma$ for $(p,2p)$ reactions when combined with the CsI(Na) CATANA array., Comment: 25 pages, 29 figures

Published
2023
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5. Intruder configurations in 29Ne at the transition into the island of inversion: Detailed structure study of 28Ne

Author

Wang, H, Yasuda, M, Kondo, Y, Nakamura, T, Tostevin, JA, Ogata, K, Otsuka, T, Poves, A, Shimizu, N, Yoshida, K, 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, Dombrádi, Zs, Douma, C, Elekes, Z, Fallon, P, Gašparić, I, Gheller, J-M, Gibelin, J, Gillibert, A, Harakeh, MN, Hirayama, A, Hoffman, CR, Holl, M, Horvat, A, Horváth, Á, 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, Lindberg, S, Marqués, FM, Masuoka, S, Mayer, J, Miki, K, Murakami, T, Najafi, MA, Nakano, K, Nakatsuka, N, Nilsson, T, Obertelli, A, Orr, NA, Otsu, H, Ozaki, T, Panin, V, Paschalis, S, Revel, A, Rossi, D, Saito, AT, Saito, T, 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, and Yoneda, K

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, NSD-Accelerator-Based Low Energy Research, Mathematical Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Mathematical sciences, Physical sciences
Abstract

Detailed γ-ray spectroscopy of the exotic neon isotope 28Ne has been performed for the first time using the one-neutron removal reaction from 29Ne on a liquid hydrogen target at 240 MeV/nucleon. Based on an analysis of parallel momentum distributions, a level scheme with spin-parity assignments has been constructed for 28Ne and the negative-parity states are identified for the first time. The measured partial cross sections and momentum distributions reveal a significant intruder p-wave strength providing evidence of the breakdown of the N=20 and N=28 shell gaps. Only a weak, possible f-wave strength was observed to bound final states. Large-scale shell-model calculations with different effective interactions do not reproduce the large p-wave and small f-wave strength observed experimentally, indicating an ongoing challenge for a complete theoretical description of the transition into the island of inversion along the Ne isotopic chain.

Published
2023

6. Border of the Island of Inversion: Unbound states in $^{29}$Ne

Author

Holl, M., Lindberg, S., Heinz, A., Kondo, Y., Nakamura, T., Tostevin, J. A., Wang, H., Nilsson, T., Achouri, N. L., Falou, H. Al, 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., Fernández, P. Díaz, Dombrádi, Z., Douma, C. A., Elekes, 13 Z., Fallon, P., Gašparić, I., Gheller, J. -M., Gibelin, J., Gillibert, A., Harakeh, M. N., Hirayama, A., Hoffman, C. R., Horvat, A., Horváth, Á., Hwang, J. W., Isobe, T., Kahlbow, J., Kalantar-Nayestanaki, N., Kawase, S., Kim, S., Kisamori, K., Kobayashi, T., Körper, D., Koyama, S., Kuti, I., Lapoux, V., Marqués, F. M., Masuoka, S., Mayer, J., Miki, K., Murakami, T., Najafi, M., Nakano, K., Nakatsuka, N., Obertelli, A., Santos, F. de Oliveira, Orr, N. A., Otsu, H., Ozaki, T., Panin, V., Paschalis, S., Revel, A., Rossi, D., Saito, A. T., Saito, T. Y., 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., and Yoneda, K.

Subjects
Nuclear Experiment
Abstract

The nucleus $^{29}$Ne is situated at the border of the island of inversion. Despite significant efforts, no bound low-lying intruder $f_{7/2}$-state, which would place $^{29}$Ne firmly inside the island of inversion, has yet been observed. Here, the first investigation of unbound states of $^{29}$Ne is reported. The states were populated in $^{30}\mathrm{Ne}(p,pn)$ and $^{30}\mathrm{Na}(p,2p)$ 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 $\ell$-assignments for the observed states. The lowest-lying resonance at an excitation energy of 1.48(4) MeV shows clear signs of a significant $\ell$=3-component, giving first evidence for $f_{7/2}$ single particle strength in $^{29}$Ne. The excitation energies and strengths of the observed states are compared to shell-model calculations using the sdpf-u-mix interaction, Comment: 12 pages, 14 figures, accepted for publication in Physical Review C

Published
2022
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7. Border of the island of inversion: Unbound states in Ne29

Author

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, Fernández, P Díaz, Dombrádi, Z, Douma, CA, Elekes, Z, Fallon, P, Gašparić, I, Gheller, J-M, Gibelin, J, Gillibert, A, Harakeh, MN, Hirayama, A, Hoffman, CR, Horvat, A, Horváth, Á, 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, and Yoneda, K

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, Nuclear and plasma physics
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.

Published
2022

8. First observation of 28O

Author

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

Published
2023
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9. Extending the Southern Shore of the Island of Inversion to $^{28}$F

Author

Revel, A., Sorlin, O., Marques, F. M., Kondo, Y., Kahlbow, J., Nakamura, T., Orr, N. A., Nowacki, F., Tostevin, J. A., Yuan, C. X., Achouri, N. L., Falou, H. Al, 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., Dombradi, Z., Douma, C. A., Elekes, Z., Fallon, P., Gasparic, I., Gheller, J. -M., Gibelin, J., Gillibert, A., Harakeh, M. N., He, W., Hirayama, A., Hoffman, C. R., Holl, M., Horvat, A., Horvath, A., Hwang, J. W., Isobe, T., Kalantar-Nayestanaki, N., Kawase, S., Kim, S., Kisamori, K., Kobayashi, T., Korper, 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., Santos, F. de Oliveira, 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., Tornqvist, H., Togano, Y., Tomai, T., Tscheuschner, J., Tsubota, J., Uesaka, T., Yang, Z., Yasuda, M., and Yoneda, K.

Subjects
Nuclear Experiment
Abstract

Detailed spectroscopy of the neutron-unbound nucleus $^{28}$F has been performed for the first time following proton/neutron removal from $^{29}$Ne/$^{29}$F beams at energies around 230 MeV/nucleon. The invariant-mass spectra were reconstructed for both the $^{27}$F$^{(*)}+n$ and $^{26}$F$^{(*)}+2n$ coincidences and revealed a series of well-defined resonances. A near-threshold state was observed in both reactions and is identified as the $^{28}$F ground state, with $S_n(^{28}$F$)=-199(6)$ keV, while analysis of the $2n$ decay channel allowed a considerably improved $S_n(^{27}$F$)=1620(60)$ 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 $^{28}$F. Importantly, in the case of the ground state, the reconstructed $^{27}$F$+n$ momentum distribution following neutron removal from $^{29}$F indicates that it arises mainly from the $1p_{3/2}$ neutron intruder configuration. This demonstrates that the island of inversion around $N=20$ includes $^{28}$F, and most probably $^{29}$F, and suggests that $^{28}$O is not doubly magic., Comment: 6 pages, 3 figures, Supplemental Material, accepted for publication in Physical Review Letters

Published
2020
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10. Study of multi-neutron systems with SAMURAI spectrometer

Author

Yang, Z. H., Marqués, F. M., Achouri, N. L., Ahn, D. S., Aumann, T., Baba, H., Beaumel, D., Böhmer, M., Boretzky, K., Caamaño, M., Chen, S., Chiga, N., Cortés, M. L., Cortina, D., Doornenbal, P., Douma, C. A., Dufter, F., Feng, J., Fernández-Domínguez, B., Elekes, Z., Forsberg, U., Fujino, T., Fukuda, N., Gašparić, I., Ge, Z., Gernhäuser, R., Gheller, J. M., Gibelin, J., Gillibert, A., Godoy, B. M., Halász, Z., Harada, T., Harakeh, M. N., Hirayama, A., Huang, S. W., Inabe, N., Isobe, T., Kahlbow, J., Kalantar-Nayestanaki, N., Kim, D., Kim, S., Knösel, M. A., Kobayashi, T., Kondo, Y., Koseoglou, P., Kubota, Y., Kuti, I., Lehr, C., Li, P. J., Liu, Y., Maeda, Y., Masuoka, S., Matsumoto, M., Mayer, J., Miki, H., Miwa, M., Murray, I., Nakamura, T., Obertelli, A., Orr, N., Otsu, H., Panin, V., Park, S., Parlog, M., Paschalis, S., Potlog, M., Reichert, S., Revel, A., Rossi, D., Saito, A., Sasano, M., Sato, H., Scheit, H., Schindler, F., Shimada, T., Shimizu, Y., Shimoura, S., Stefan, I., Storck, S., Stuhl, L., Suzuki, H., Symochko, D., Takeda, H., Takeuchi, S., Tanaka, J., Togano, Y., Tomai, T., Tscheuschner, H. T. Törnqvsit. J., Uesaka, T., Wagner, V., Wimmer, K., Yamada, H., Yang, B., Yang, L., Yasuda, Y., Yoneda, K., Zanetti, L., and Zenihiro, J.

Subjects
Nuclear Experiment
Abstract

The tetraneutron has been drawing the attention of the nuclear physics community for decades, but a firm conclusion on its existence and properties is still far from being reached despite many experimental and theoretical efforts. New measurements have recently been performed at RIBF with the SAMURAI spectrometer by applying complementary reaction probes, which will help to pin down the properties of this four-neutron system., Comment: 5 pages, 2 figures, conference proceedings of XXII International Conference on Few-Body Problems in Physics (FB22), Caen, France, July 2018

Published
2019

11. Extending the Southern Shore of the Island of Inversion to F28

Author

Revel, A, Sorlin, O, Marqués, FM, Kondo, Y, Kahlbow, J, Nakamura, T, Orr, NA, Nowacki, F, Tostevin, JA, Yuan, CX, 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, Dombrádi, Z, Douma, CA, Elekes, Z, Fallon, P, Gašparić, I, Gheller, J-M, Gibelin, J, Gillibert, A, Harakeh, MN, He, W, Hirayama, A, Hoffman, CR, Holl, M, Horvat, A, Horváth, Á, Hwang, JW, 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, AT, 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

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, SAMURAI21 collaboration, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

Detailed spectroscopy of the neutron-unbound nucleus ^{28}F has been performed for the first time following proton/neutron removal from ^{29}Ne/^{29}F beams at energies around 230  MeV/nucleon. The invariant-mass spectra were reconstructed for both the ^{27}F^{(*)}+n and ^{26}F^{(*)}+2n coincidences and revealed a series of well-defined resonances. A near-threshold state was observed in both reactions and is identified as the ^{28}F ground state, with S_{n}(^{28}F)=-199(6)  keV, while analysis of the 2n decay channel allowed a considerably improved S_{n}(^{27}F)=1620(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 ^{28}F. Importantly, in the case of the ground state, the reconstructed ^{27}F+n momentum distribution following neutron removal from ^{29}F indicates that it arises mainly from the 1p_{3/2} neutron intruder configuration. This demonstrates that the island of inversion around N=20 includes ^{28}F, and most probably ^{29}F, and suggests that ^{28}O is not doubly magic.

Published
2020

12. Extending the Southern Shore of the Island of Inversion to ^{28}F.

Author

Revel, A, Sorlin, O, Marqués, FM, Kondo, Y, Kahlbow, J, Nakamura, T, Orr, NA, Nowacki, F, Tostevin, JA, Yuan, CX, 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, Dombrádi, Z, Douma, CA, Elekes, Z, Fallon, P, Gašparić, I, Gheller, J-M, Gibelin, J, Gillibert, A, Harakeh, MN, He, W, Hirayama, A, Hoffman, CR, Holl, M, Horvat, A, Horváth, Á, Hwang, JW, 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, AT, 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, and SAMURAI21 collaboration

Subjects
SAMURAI21 collaboration, General Physics, Mathematical Sciences, Physical Sciences, Engineering
Abstract

Detailed spectroscopy of the neutron-unbound nucleus ^{28}F has been performed for the first time following proton/neutron removal from ^{29}Ne/^{29}F beams at energies around 230  MeV/nucleon. The invariant-mass spectra were reconstructed for both the ^{27}F^{(*)}+n and ^{26}F^{(*)}+2n coincidences and revealed a series of well-defined resonances. A near-threshold state was observed in both reactions and is identified as the ^{28}F ground state, with S_{n}(^{28}F)=-199(6)  keV, while analysis of the 2n decay channel allowed a considerably improved S_{n}(^{27}F)=1620(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 ^{28}F. Importantly, in the case of the ground state, the reconstructed ^{27}F+n momentum distribution following neutron removal from ^{29}F indicates that it arises mainly from the 1p_{3/2} neutron intruder configuration. This demonstrates that the island of inversion around N=20 includes ^{28}F, and most probably ^{29}F, and suggests that ^{28}O is not doubly magic.

Published
2020

14. Observation of a correlated free four-neutron system

Author

Duer, M., Aumann, T., Gernhäuser, R., Panin, V., Paschalis, S., Rossi, D. M., Achouri, N. L., Ahn, D., Baba, H., Bertulani, C. A., Böhmer, M., Boretzky, K., Caesar, C., Chiga, N., Corsi, A., Cortina-Gil, D., Douma, C. A., Dufter, F., Elekes, Z., Feng, J., Fernández-Domínguez, B., Forsberg, U., Fukuda, N., Gasparic, I., Ge, Z., Gheller, J. M., Gibelin, J., Gillibert, A., Hahn, K. I., Halász, Z., Harakeh, M. N., Hirayama, A., Holl, M., Inabe, N., Isobe, T., Kahlbow, J., Kalantar-Nayestanaki, N., Kim, D., Kim, S., Kobayashi, T., Kondo, Y., Körper, D., Koseoglou, P., Kubota, Y., Kuti, I., Li, P. J., Lehr, C., Lindberg, S., Liu, Y., Marqués, F. M., Masuoka, S., Matsumoto, M., Mayer, J., Miki, K., Monteagudo, B., Nakamura, T., Nilsson, T., Obertelli, A., Orr, N. A., Otsu, H., Park, S. Y., Parlog, M., Potlog, P. M., Reichert, S., Revel, A., Saito, A. T., Sasano, M., Scheit, H., Schindler, F., Shimoura, S., Simon, H., Stuhl, L., Suzuki, H., Symochko, D., Takeda, H., Tanaka, J., Togano, Y., Tomai, T., Törnqvist, H. T., Tscheuschner, J., Uesaka, T., Wagner, V., Yamada, H., Yang, B., Yang, L., Yang, Z. H., Yasuda, M., Yoneda, K., Zanetti, L., Zenihiro, J., and Zhukov, M. V.

Published
2022
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15. Publisher Correction: First observation of 28O

Author

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

Published
2023
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16. Energy-control and novel particle-identification methods combined with range in a multi-sampling ionization chamber for experiments using slowed-down RI beams

Author

Sumikama, T., Ahn, D.S., Fukuda, N., Shimizu, Y., Suzuki, H., Takeda, H., Wang, H., Yoshida, K., Amano, J., Chiga, N., Chikaato, K., Hirayama, A., Inabe, N., Kawase, S., Kubono, S., Matsushita, M., Michimasa, S., Nakano, K., Otsu, H., Sakurai, H., Saito, A., Shimoura, S., Suwa, J., Takechi, M., Takeuchi, S., Togano, Y., Tomai, T., and Watanabe, Y.

Published
2021
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17. Study of Multi-neutron Systems with SAMURAI Spectrometer

Author

Yang, Z. H., Marqués, F. M., Achouri, N. L., Ahn, D. S., Aumann, T., Baba, H., Beaumel, D., Böhmer, M., Boretzky, K., Caamaño, M., Chen, S., Chiga, N., Cortés, M. L., Cortina, D., Doornenbal, P., Douma, C. A., Dufter, F., Feng, J., Fernández-Domínguez, B., Elekes, Z., Forsberg, U., Fujino, T., Fukuda, N., Gašparić, I., Ge, Z., Gernhäuser, R., Gheller, J. M., Gibelin, J., Gillibert, A., Godoy, B. M., Halász, Z., Harada, T., Harakeh, M. N., Hirayama, A., Huang, S. W., Inabe, N., Isobe, T., Kahlbow, J., Kalantar-Nayestanaki, N., Kim, D., Kim, S., Knösel, M. A., Kobayashi, T., Kondo, Y., Koseoglou, P., Kubota, Y., Kuti, I., Lehr, C., Li, P. J., Liu, Y., Maeda, Y., Masuoka, S., Matsumoto, M., Mayer, J., Miki, H., Miwa, M., Murray, I., Nakamura, T., Obertelli, A., Orr, N. A., Otsu, H., Panin, V., Park, S., Parlog, M., Paschalis, S., Potlog, M., Reichert, S., Revel, A., Rossi, D., Saito, A., Sasano, M., Sato, H., Scheit, H., Schindler, F., Shimada, T., Shimizu, Y., Shimoura, S., Stefan, I., Storck, S., Stuhl, L., Suzuki, H., Symochko, D., Takeda, H., Takeuchi, S., Tanaka, J., Togano, Y., Tomai, T., Törnqvsit, H. T., Tscheuschner, J., Uesaka, T., Wagner, V., Wimmer, K., Yamada, H., Yang, B., Yang, L., Yasuda, Y., Yoneda, K., Zanetti, L., Zenihiro, J., Orr, N. A., editor, Ploszajczak, M., editor, Marqués, F. M., editor, and Carbonell, J., editor

Published
2020
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18. Study of spin-isospin responses of radioactive nuclei with the background-reduced neutron spectrometer, PANDORA

Author

Stuhl, L., Sasano, M., Gao, J., Hirai, Y., Yako, K., Wakasa, T., Ahn, D.S., Baba, H., Chilug, A.I., Franchoo, S., Fujino, Y., Fukuda, N., Gibelin, J., Hahn, I.S., Halász, Z., Harada, T., Harakeh, M.N., Inomoto, D., Isobe, T., Kasahara, H., Kim, D., Kiss, G.G., Kobayashi, T., Kondo, Y., Korkulu, Z., Koyama, S., Kubota, Y., Kurihara, A., Liu, H.N., Matsumoto, M., Michimasa, S., Miki, H., Miwa, M., Motobayashi, T., Nakamura, T., Nishimura, M., Otsu, H., Panin, V., Park, S., Saito, A.T., Sakai, H., Sato, H., Shimada, T., Shimizu, Y., Shimoura, S., Spiridon, A., Stefanescu, I.C., Sun, X., Sun, Y.L., Suzuki, H., Takada, E., Togano, Y., Tomai, T., Trache, L., Tudor, D., Uesaka, T., Yamada, H., Yang, Z., Yasuda, M., Yoneda, K., Yoshida, K., Zenihiro, J., and Zhang, N.

Published
2020
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21. Experimental study of ⁴n with ⁸He(p,2p) reaction

Author

Huang, S. W., Yang, H., Marqués, F. M., Achouri, N. L., Ahn, D. S., Aumann, T., Baba, H., Beaumel, D., Böhmer, M., Boretzky, K., Caamaño, M., Chen, S., Chiga, N., Cortés, M. L., Cortina, D., Doornenbal, P., Douma, C. A., Dufter, F., Feng, J., Fernández-Domínguez, B., Elekes, Z., Forsberg, U., Fujino, T., Fukuda, N., Gašparić, I., Ge, Z., Gernhäuser, R., Gheller, J. M., Gibelin, J., Gillibert, A., Godoy, B. M., Halász, Z., Harada, T., Harakeh, M. N., Hirayama, A., Inabe, N., Isobe, T., Kahlbow, J., Kalantar-Nayestanaki, N., Kim, D., Kim, S., Knösel, M. A., Kobayashi, T., Kondo, Y., Koseoglou, P., Kubota, Y., Kuti, I., Lehr, C., Li, P. J., Liu, Y., Maeda, Y., Masuoka, S., Matsumoto, M., Mayer, J., Miki, H., Miwa, M., Murray, I., Nakamura, T., Obertelli, A., Orr, N., Otsu, H., Panin, V., Park, S., Parlog, M., Paschalis, S., Potlog, M., Reichert, S., Revel, A., Rossi, D., Saito, A., Sasano, M., Sato, H., Scheit, H., Schindler, F., Shimada, T., Shimizu, Y., Shimoura, S., Stefan, I., Storck, S., Stuhl, L., Suzuki, H., Symochko, D., Takeda, H., Takeuchi, S., Tanaka, J., Togano, Y., Tomai, T., Törnqvsit, H. T., Tscheuschner, J., Uesaka, T., Wagner, V., Wimmer, K., Yamada, H., Yang, B., Yang, L., Yasuda, Y., Yoneda, K., Zanetti, L., Zenihiro, J., Elidiano, T., Lenain, C., Huang, S. W., Yang, H., Marqués, F. M., Achouri, N. L., Ahn, D. S., Aumann, T., Baba, H., Beaumel, D., Böhmer, M., Boretzky, K., Caamaño, M., Chen, S., Chiga, N., Cortés, M. L., Cortina, D., Doornenbal, P., Douma, C. A., Dufter, F., Feng, J., Fernández-Domínguez, B., Elekes, Z., Forsberg, U., Fujino, T., Fukuda, N., Gašparić, I., Ge, Z., Gernhäuser, R., Gheller, J. M., Gibelin, J., Gillibert, A., Godoy, B. M., Halász, Z., Harada, T., Harakeh, M. N., Hirayama, A., Inabe, N., Isobe, T., Kahlbow, J., Kalantar-Nayestanaki, N., Kim, D., Kim, S., Knösel, M. A., Kobayashi, T., Kondo, Y., Koseoglou, P., Kubota, Y., Kuti, I., Lehr, C., Li, P. J., Liu, Y., Maeda, Y., Masuoka, S., Matsumoto, M., Mayer, J., Miki, H., Miwa, M., Murray, I., Nakamura, T., Obertelli, A., Orr, N., Otsu, H., Panin, V., Park, S., Parlog, M., Paschalis, S., Potlog, M., Reichert, S., Revel, A., Rossi, D., Saito, A., Sasano, M., Sato, H., Scheit, H., Schindler, F., Shimada, T., Shimizu, Y., Shimoura, S., Stefan, I., Storck, S., Stuhl, L., Suzuki, H., Symochko, D., Takeda, H., Takeuchi, S., Tanaka, J., Togano, Y., Tomai, T., Törnqvsit, H. T., Tscheuschner, J., Uesaka, T., Wagner, V., Wimmer, K., Yamada, H., Yang, B., Yang, L., Yasuda, Y., Yoneda, K., Zanetti, L., Zenihiro, J., Elidiano, T., and Lenain, C.

Abstract

The tetraneutron has attracted the attention of nuclear physicists during the past decades, but there is still no unambiguous confirmation of its existence or non-existence. A new experiment based on ⁸He(p,2p)⁷H{t+⁴ n} reaction, with direct detection of the four neutrons, has been carried out at RIBF, which can hopefully help to draw a definite conclusion on the tetraneutron system.

Published
2024

22. Lifetime measurement of the ²⁶O g.s. at SAMURAI

Author

Storck, S., Caesar, C., Kahlbow, J., Panin, V., Ahn, D. S., Atar, L., Aumann, T., Baba, H., Boretzky’, K., Chae, H., Chiga, N., Choi, S., Cortés, M. L., Cortina-Gil, D., Deshayes, Q., Doornenbal, P., Elekes, Z., Fukuda, N., Gašparić, I., Hahn, K. I., Halász, Z., Hirayama, A., Hwang, J., Inabe, N., Isobe, T., Kim, S., Kobayashi, T., Körper, D., Marques, M., Matsumoto, M., Murakami, T., Murray, I., Nakamura, T., Nilsson, T., Otsu, H., Paschalis, S., Parlog, M., Petri, M., Rossi, D., Saito, A., Sasano, M., Scheit, H., Schrock, P., Shimizu, Y., Simon, H., Sohler, D., Sorlin, O., Stuhl, L., Suzuki, H., Syndikus, I., Takeda, H., Törnqvist, H., Togano, Y., Tomai, T., Uesaka, T., Yamada, H., Yang, Z., Yasuda, M., Yoneda, K. I., Storck, S., Caesar, C., Kahlbow, J., Panin, V., Ahn, D. S., Atar, L., Aumann, T., Baba, H., Boretzky’, K., Chae, H., Chiga, N., Choi, S., Cortés, M. L., Cortina-Gil, D., Deshayes, Q., Doornenbal, P., Elekes, Z., Fukuda, N., Gašparić, I., Hahn, K. I., Halász, Z., Hirayama, A., Hwang, J., Inabe, N., Isobe, T., Kim, S., Kobayashi, T., Körper, D., Marques, M., Matsumoto, M., Murakami, T., Murray, I., Nakamura, T., Nilsson, T., Otsu, H., Paschalis, S., Parlog, M., Petri, M., Rossi, D., Saito, A., Sasano, M., Scheit, H., Schrock, P., Shimizu, Y., Simon, H., Sohler, D., Sorlin, O., Stuhl, L., Suzuki, H., Syndikus, I., Takeda, H., Törnqvist, H., Togano, Y., Tomai, T., Uesaka, T., Yamada, H., Yang, Z., Yasuda, M., and Yoneda, K. I.

Abstract

The ground state of the neutron unbound nucleus ²⁶O is speculated to have a lifetime in the pico-second regime. In order to determine the decay lifetime of the ²⁶O ground state with high sensitivity and precision, a new method has been applied. The experiment was performed in December 2016 at the Superconducting Analyzer for MUlti-particle from Radio Isotope Beams (SAMURAI) at the Radioactive Isotope Beam Factory (RIBF) at RIKEN. A ²⁷F beam was produced in the fragment separator BigRIPS and impinged on a W/Pt target ²⁶O ²⁶O outside the target. Thus, the velocity difference between the decay neutrons and the fragment 1 O delivers a characteristic spectrum from which the lifetime can be extracted.

Published
2024

23. Experimental Study of 4n by Directly Detecting the Decay Neutrons

Author

Huang, S. W., Yang, Z. H., Marqués, F. M., Achouri, N. L., Ahn, D. S., Aumann, T., Baba, H., Beaumel, D., Böhmer, M., Boretzky, K., Caamaño, M., Chen, S., Chiga, N., Cortés, M. L., Cortina, D., Doornenbal, P., Douma, C. A., Dufter, F., Feng, J., Fernández-Domínguez, B., Elekes, Z., Forsberg, U., Fujino, T., Fukuda, N., Gašparić, I., Ge, Z., Gernhäuser, R., Gheller, J. M., Gibelin, J., Gillibert, A., Halász, Z., Harada, T., Harakeh, M. N., Hirayama, A., Inabe, N., Isobe, T., Kahlbow, J., Kalantar-Nayestanaki, N., Kim, D., Kim, S., Kiyotake, S., Kobayashi, T., Kondo, Y., Koseoglou, P., Kubota, Y., Kuti, I., Lehr, C., Lenain, C., Li, P. J., Liu, Y., Maeda, Y., Masuoka, S., Matsumoto, M., Matta, A., Mayer, J., Miki, H., Miwa, M., Monteagudo, B., Murray, I., Nakamura, T., Obertelli, A., Orr, N. A., Otsu, H., Panin, V., Park, S., Parlog, M., Paschalis, S., Potlog, M., Reichert, S., Revel, A., Rossi, D., Saito, A., Sasano, M., Sato, H., Scheit, H., Schindler, F., Shimada, T., Shimizu, Y., Shimoura, S., Simon, H., Stefan, I., Storck, S., Stuhl, L., Suzuki, H., Symochko, D., Takeda, H., Takeuchi, S., Tanaka, J., Togano, Y., Tomai, T., Törnqvist, H. T., Tronchin, E., Tscheuschner, J., Uesaka, T., Wagner, V., Wimmer, K., Yamada, H., Yang, B., Yang, L., Yasuda, Y., Yoneda, K., Zanetti, L., and Zenihiro, J.

Published
2021
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24. Validation of the Be10 Ground-State Molecular Structure Using Be10(p,pα)He6 Triple Differential Reaction Cross-Section Measurements

Author

Li, P. J., primary, Beaumel, D., additional, Lee, J., additional, Assié, M., additional, Chen, S., additional, Franchoo, S., additional, Gibelin, J., additional, Hammache, F., additional, Harada, T., additional, Kanada-En’yo, Y., additional, Kubota, Y., additional, Leblond, S., additional, Liang, P. F., additional, Lokotko, T., additional, Lyu, M., additional, Marqués, F. M., additional, Matsuda, Y., additional, Ogata, K., additional, Otsu, H., additional, Rindel, E., additional, Stuhl, L., additional, Suzuki, D., additional, Togano, Y., additional, Tomai, T., additional, Xu, X. X., additional, Yoshida, K., additional, Zenihiro, J., additional, Achouri, N. L., additional, Aumann, T., additional, Baba, H., additional, Cardella, G., additional, Ceruti, S., additional, Stefanescu, A. I., additional, Corsi, A., additional, Frotscher, A., additional, Gao, J., additional, Gillibert, A., additional, Inaba, K., additional, Isobe, T., additional, Kawabata, T., additional, Kitamura, N., additional, Kobayashi, T., additional, Kondo, Y., additional, Kurihara, A., additional, Liu, H. N., additional, Miki, H., additional, Nakamura, T., additional, Obertelli, A., additional, Orr, N. A., additional, Panin, V., additional, Sasano, M., additional, Shimada, T., additional, Sun, Y. L., additional, Tanaka, J., additional, Trache, L., additional, Tudor, D., additional, Uesaka, T., additional, Wang, H., additional, Yamada, H., additional, Yang, Z. H., additional, and Yasuda, M., additional

Published
2023
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26. Shape coexistence in 66Se

Author

Elekes, Z., primary, Panin, V., additional, Rodríguez, T.R., additional, Sieja, K., additional, Ahn, D.S., additional, Al-Adili, A., additional, Baba, H., additional, Stefanescu, A.I., additional, Cook, K.J., additional, Dósa, Cs., additional, Fukuda, N., additional, Gao, J., additional, Gibelin, J., additional, Hahn, K.I., additional, Halász, Z., additional, Huang, S.W., additional, Isobe, T., additional, Juhász, M.M., additional, Kim, D., additional, Kobayashi, T., additional, Kondo, Y., additional, Korkulu, Z., additional, Kurihara, A., additional, Kuti, I., additional, Miki, H., additional, Miki, K., additional, Motobayashi, T., additional, Otsu, H., additional, Saastamoinen, A., additional, Sasano, M., additional, Sato, H., additional, Shimada, T., additional, Shimizu, Y., additional, Sobotka, L.G., additional, Stefanescu, I., additional, Stuhl, L., additional, Suzuki, H., additional, Takeda, H., additional, Togano, Y., additional, Tomai, T., additional, Trache, L., additional, Tudor, D., additional, Uesaka, T., additional, Utsuki, Y., additional, Wang, H., additional, Yasuda, A., additional, Yoneda, K., additional, and Yoshitome, Y., additional

Published
2023
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27. Study of Multi-neutron Systems with SAMURAI Spectrometer

Author

Yang, Z. H., primary, Marqués, F. M., additional, Achouri, N. L., additional, Ahn, D. S., additional, Aumann, T., additional, Baba, H., additional, Beaumel, D., additional, Böhmer, M., additional, Boretzky, K., additional, Caamaño, M., additional, Chen, S., additional, Chiga, N., additional, Cortés, M. L., additional, Cortina, D., additional, Doornenbal, P., additional, Douma, C. A., additional, Dufter, F., additional, Feng, J., additional, Fernández-Domínguez, B., additional, Elekes, Z., additional, Forsberg, U., additional, Fujino, T., additional, Fukuda, N., additional, Gašparić, I., additional, Ge, Z., additional, Gernhäuser, R., additional, Gheller, J. M., additional, Gibelin, J., additional, Gillibert, A., additional, Godoy, B. M., additional, Halász, Z., additional, Harada, T., additional, Harakeh, M. N., additional, Hirayama, A., additional, Huang, S. W., additional, Inabe, N., additional, Isobe, T., additional, Kahlbow, J., additional, Kalantar-Nayestanaki, N., additional, Kim, D., additional, Kim, S., additional, Knösel, M. A., additional, Kobayashi, T., additional, Kondo, Y., additional, Koseoglou, P., additional, Kubota, Y., additional, Kuti, I., additional, Lehr, C., additional, Li, P. J., additional, Liu, Y., additional, Maeda, Y., additional, Masuoka, S., additional, Matsumoto, M., additional, Mayer, J., additional, Miki, H., additional, Miwa, M., additional, Murray, I., additional, Nakamura, T., additional, Obertelli, A., additional, Orr, N. A., additional, Otsu, H., additional, Panin, V., additional, Park, S., additional, Parlog, M., additional, Paschalis, S., additional, Potlog, M., additional, Reichert, S., additional, Revel, A., additional, Rossi, D., additional, Saito, A., additional, Sasano, M., additional, Sato, H., additional, Scheit, H., additional, Schindler, F., additional, Shimada, T., additional, Shimizu, Y., additional, Shimoura, S., additional, Stefan, I., additional, Storck, S., additional, Stuhl, L., additional, Suzuki, H., additional, Symochko, D., additional, Takeda, H., additional, Takeuchi, S., additional, Tanaka, J., additional, Togano, Y., additional, Tomai, T., additional, Törnqvsit, H. T., additional, Tscheuschner, J., additional, Uesaka, T., additional, Wagner, V., additional, Wimmer, K., additional, Yamada, H., additional, Yang, B., additional, Yang, L., additional, Yasuda, Y., additional, Yoneda, K., additional, Zanetti, L., additional, and Zenihiro, J., additional

Published
2020
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28. Intruder configurations in 29Ne at the transition into the island of inversion: Detailed structure study of 28Ne

Author

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

Published
2023
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29. STRASSE: a silicon tracker for quasi-free scattering measurements at the RIBF

Author

Liu, H. N., primary, Flavigny, F., additional, Baba, H., additional, Boehmer, M., additional, Bonnes, U., additional, Borshchov, V., additional, Doornenbal, P., additional, Ebina, N., additional, Enciu, M., additional, Frotscher, A., additional, Gernhäuser, R., additional, Girard-Alcindor, V., additional, Goupillière, D., additional, Heuser, J., additional, Kapell, R., additional, Kondo, Y., additional, Lee, H., additional, Lehnert, J., additional, Matsui, T., additional, Matta, A., additional, Nakamura, T., additional, Obertelli, A., additional, Pohl, T., additional, Protsenko, M., additional, Sasano, M., additional, Satou, Y., additional, Schmidt, C. J., additional, Schünemann, K., additional, Simons, C., additional, Sun, Y. L., additional, Tanaka, J., additional, Togano, Y., additional, Tomai, T., additional, Tymchuk, I., additional, Uesaka, T., additional, Visinka, R., additional, Wang, H., additional, and Wienholtz, F., additional

Published
2023
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30. Shape coexistence in Se

Author

Elekes, Z., Panin, V., Rodríguez, T.R., Sieja, K., Ahn, D.S., Al-Adili, A., Baba, H., Stefanescu, A.I., Cook, K.J., Dósa, Cs., Fukuda, N., Gao, J., Gibelin, J., Hahn, K.I., Halász, Z., Huang, S.W., Isobe, T., Juhász, M.M., Kim, D., Kobayashi, T., Kondo, Y., Korkulu, Z., Kurihara, A., Kuti, I., Miki, H., Miki, K., Motobayashi, T., Otsu, H., Saastamoinen, A., Sasano, M., Sato, H., Shimada, T., Shimizu, Y., Sobotka, L.G., Stefanescu, I., Stuhl, L., Suzuki, H., Takeda, H., Togano, Y., Tomai, T., Trache, L., Tudor, D., Uesaka, T., Utsuki, Y., Wang, H., Yasuda, A., Yoneda, K., and Yoshitome, Y.

Abstract

The nuclear structure of $^{66}$Se, nucleus beyond the N=Z line on the proton-rich side of the valley of stability, was investigated by the neutron knock-out reaction $^{67}$Se($^{12}$C,X)$^{66}$Se using a $^{12}$C target. The analysis of the singles spectrum of the γ-rays emitted during the de-excitation of the populated low-lying excited states revealed two previously detected (927(4) keV, 1460(32) keV) and three new (744(6) keV, 1210(17) keV, 1661(23) keV) transitions. The 744-keV, the 1210-keV, and the 1460-keV transitions were found to be in coincidence with the one at 927 keV. The spectrum coincident with the 927-keV transition showed a further possible transition at 299(35) keV, which was obscured by significant atomic background in the singles spectrum. This transition might correspond to a peak previously reported at 273(5) keV that could not be assigned to $^{66}$Se unambiguously. Based on a comparison of the experimental data to theoretical calculations, four new excited states are proposed which suggest that $^{66}$Se exhibits shape coexistence.

Published
2023

31. Intruder configurations in Ne at the transition into the island of inversion: Detailed structure study of Ne

Author

Wang, H., Yasuda, M., Kondo, Y., Nakamura, T., Tostevin, J.A., Ogata, K., Otsuka, T., Poves, A., Shimizu, N., Yoshida, K., 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, Zs., Douma, C., Elekes, Z., Fallon, P., Gašparić, I., Gheller, J.M., Gibelin, J., Gillibert, A., Harakeh, M.N., Hirayama, A., Hoffman, C.R., Holl, M., Horvat, A., Horváth, Á., Hwang, J.W., Isobe, T., Kahlbow, J., Kalantar-Nayestanaki, N., Kawase, S., Kim, S., Kisamori, K., Kobayashi, T., Körper, D., Koyama, S., Kuti, I., Lapoux, V., Lindberg, S., Marqués, F.M., Masuoka, S., Mayer, J., Miki, K., Murakami, T., Najafi, M.A., Nakano, K., Nakatsuka, N., Nilsson, T., Obertelli, A., Orr, N.A., Otsu, H., Ozaki, T., Panin, V., Paschalis, S., Revel, A., 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., Sorlin, O., Stuhl, L., Takeuchi, S., Tanaka, M., Thoennessen, M., Törnqvist, H., Togano, Y., Tomai, T., Tscheuschner, J., Tsubota, J., Uesaka, T., Yang, Z., and Yoneda, K.

Abstract

Detailed γ-ray spectroscopy of the exotic neon isotope $^{28}$Ne has been performed for the first time using the one-neutron removal reaction from $^{29}$Ne on a liquid hydrogen target at 240 MeV/nucleon. Based on an analysis of parallel momentum distributions, a level scheme with spin-parity assignments has been constructed for $^{28}$Ne and the negative-parity states are identified for the first time. The measured partial cross sections and momentum distributions reveal a significant intruder p-wave strength providing evidence of the breakdown of the N=20 and N=28 shell gaps. Only a weak, possible f-wave strength was observed to bound final states. Large-scale shell-model calculations with different effective interactions do not reproduce the large p-wave and small f-wave strength observed experimentally, indicating an ongoing challenge for a complete theoretical description of the transition into the island of inversion along the Ne isotopic chain.

Published
2023

32. Enhancement of element production by incomplete fusion reaction with weakly bound deuteron

Author

Wang, H., Otsu, H., Chiga, N., Kawase, S., Takeuchi, S., Sumikama, T., Koyama, S., Sakurai, H., Watanabe, Y., Nakayama, S., Ahn, D. S., Baba, H., Chen, S. D., Chikaato, K., Cortés, M. L., Fukuda, N., Hirayama, A., Hosoda, R., Isobe, T., Kawakami, S., Kondo, Y., Kubono, S., Maeda, Y., Masuoka, S., Michimasa, S., Murray, I., Nakajima, R., Nakamura, T., Nakano, K., Nishimura, M., Ozaki, T., Saito, A., Saito, T., Sato, H., Shimizu, Y., Shimoura, S., Söderström, P. -A., Soudo, Y., Sun, X. H., Suwa, J., Suzuki, D., Suzuki, H., Takeda, H., Takechi, M., Togano, Y., Tomai, T., Yamada, H., Yasuda, M., and Yoshida, K.

Published
2019
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33. Border of the island of inversion: Unbound states in Ne 29

Author

Holl, M, 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, Holl, M, 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, and Yoneda, K

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.

Published
2022

34. Border of the island of inversion: Unbound states in Ne-29

Author

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., Crawford, H. L., Delaunay, F., Delbart, A., Deshayes, Q., Fernandez, P. Diaz, Dombradi, Z., Douma, C. A., Elekes, Z., Fallon, P., Gasparic, I, Gheller, J-M, Gibelin, J., Gillibert, A., Harakeh, M. N., Hirayama, A., Hoffman, C. R., Horvat, A., Horvath, A., Hwang, J. W., Isobe, T., Kahlbow, J., Kalantar-Nayestanaki, N., Kawase, S., Kim, S., Kisamori, K., Kobayashi, T., Koerper, D., Koyama, S., Kuti, I, Lapoux, V, Marques, F. M., Masuoka, S., Mayer, J., Miki, K., Murakami, T., Najafi, M., Nakano, K., Nakatsuka, N., Obertelli, A., Santos, F. de Oliveira, Orr, N. A., Otsu, H., Ozaki, T., Panin, V, Paschalis, S., Revel, A., Rossi, D., Saito, A. T., Saito, T. Y., 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., Toernqvist, H., Togano, Y., Tomai, T., Tscheuschner, J., Tsubota, J., Uesaka, T., Yang, Z., Yasuda, M., Yoneda, K., 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., Crawford, H. L., Delaunay, F., Delbart, A., Deshayes, Q., Fernandez, P. Diaz, Dombradi, Z., Douma, C. A., Elekes, Z., Fallon, P., Gasparic, I, Gheller, J-M, Gibelin, J., Gillibert, A., Harakeh, M. N., Hirayama, A., Hoffman, C. R., Horvat, A., Horvath, A., Hwang, J. W., Isobe, T., Kahlbow, J., Kalantar-Nayestanaki, N., Kawase, S., Kim, S., Kisamori, K., Kobayashi, T., Koerper, D., Koyama, S., Kuti, I, Lapoux, V, Marques, F. M., Masuoka, S., Mayer, J., Miki, K., Murakami, T., Najafi, M., Nakano, K., Nakatsuka, N., Obertelli, A., Santos, F. de Oliveira, Orr, N. A., Otsu, H., Ozaki, T., Panin, V, Paschalis, S., Revel, A., Rossi, D., Saito, A. T., Saito, T. Y., 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., Toernqvist, H., Togano, Y., Tomai, T., Tscheuschner, J., Tsubota, J., Uesaka, T., Yang, Z., Yasuda, M., and Yoneda, K.

Abstract

The nucleus Ne-29 is situated at the border of the island of inversion. Despite significant efforts, no bound low-lying intruder f(7/2) state, which would place Ne-29 firmly inside the island of inversion, has yet been observed. Here, the first investigation of unbound states of Ne-29 is reported. The states were populated in Ne-30(p, pn) and Na-30(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 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 f(7/2) single particle strength in Ne-29. The excitation energies and strengths of the observed states are compared to shell-model calculations using the SDPF-U-MIX interaction.

Published
2022

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

Author

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., Crawford, H. L., Delaunay, F., Delbart, A., Deshayes, Q., D��az Fern��ndez, P., Dombr��di, Z., Douma, C. A., Elekes, Z., Fallon, P., Ga��pari��, I., Gheller, J.-M., Gibelin, J., Gillibert, A., Harakeh, M. N., Hirayama, A., Hoffman, C. R., Horvat, A., Horv��th, ��., Hwang, J. W., Isobe, T., Kahlbow, J., Kalantar-Nayestanaki, N., Kawase, S., Kim, S., Kisamori, K., Kobayashi, T., K��rper, D., Koyama, S., Kuti, I., Lapoux, V., Marqu��s, F. M., Masuoka, S., Mayer, J., Miki, K., Murakami, T., Najafi, M., Nakano, K., Nakatsuka, N., Obertelli, A., de Oliveira Santos, F., Orr, N. A., Otsu, H., Ozaki, T., Panin, V., Paschalis, S., Revel, A., Rossi, D., Saito, A. T., Saito, T. Y., 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., T��rnqvist, H., Togano, Y., Tomai, T., Tscheuschner, J., Tsubota, J., Uesaka, T., Yang, Z., Yasuda, M., Yoneda, K., 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)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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), SAMURAI21, Research unit Nuclear & Hadron Physics, and Nuclear Energy

Subjects
Physics, FOS: Physical sciences, Nuclear structure, direct reactions, radioactive beams, ddc:530, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The nucleus $^{29}$Ne is situated at the border of the island of inversion. Despite significant efforts, no bound low-lying intruder $f_{7/2}$-state, which would place $^{29}$Ne firmly inside the island of inversion, has yet been observed. Here, the first investigation of unbound states of $^{29}$Ne is reported. The states were populated in $^{30}\mathrm{Ne}(p,pn)$ and $^{30}\mathrm{Na}(p,2p)$ 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 $\ell$-assignments for the observed states. The lowest-lying resonance at an excitation energy of 1.48(4) MeV shows clear signs of a significant $\ell$=3-component, giving first evidence for $f_{7/2}$ single particle strength in $^{29}$Ne. The excitation energies and strengths of the observed states are compared to shell-model calculations using the sdpf-u-mix interaction, Comment: 12 pages, 14 figures, accepted for publication in Physical Review C

Published
2022
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36. Experimental Study of $$^{4}n$$ by Directly Detecting the Decay Neutrons

Author

Huang, S. W., primary, Yang, Z. H., additional, Marqués, F. M., additional, Achouri, N. L., additional, Ahn, D. S., additional, Aumann, T., additional, Baba, H., additional, Beaumel, D., additional, Böhmer, M., additional, Boretzky, K., additional, Caamaño, M., additional, Chen, S., additional, Chiga, N., additional, Cortés, M. L., additional, Cortina, D., additional, Doornenbal, P., additional, Douma, C. A., additional, Dufter, F., additional, Feng, J., additional, Fernández-Domínguez, B., additional, Elekes, Z., additional, Forsberg, U., additional, Fujino, T., additional, Fukuda, N., additional, Gašparić, I., additional, Ge, Z., additional, Gernhäuser, R., additional, Gheller, J. M., additional, Gibelin, J., additional, Gillibert, A., additional, Halász, Z., additional, Harada, T., additional, Harakeh, M. N., additional, Hirayama, A., additional, Inabe, N., additional, Isobe, T., additional, Kahlbow, J., additional, Kalantar-Nayestanaki, N., additional, Kim, D., additional, Kim, S., additional, Kiyotake, S., additional, Kobayashi, T., additional, Kondo, Y., additional, Koseoglou, P., additional, Kubota, Y., additional, Kuti, I., additional, Lehr, C., additional, Lenain, C., additional, Li, P. J., additional, Liu, Y., additional, Maeda, Y., additional, Masuoka, S., additional, Matsumoto, M., additional, Matta, A., additional, Mayer, J., additional, Miki, H., additional, Miwa, M., additional, Monteagudo, B., additional, Murray, I., additional, Nakamura, T., additional, Obertelli, A., additional, Orr, N. A., additional, Otsu, H., additional, Panin, V., additional, Park, S., additional, Parlog, M., additional, Paschalis, S., additional, Potlog, M., additional, Reichert, S., additional, Revel, A., additional, Rossi, D., additional, Saito, A., additional, Sasano, M., additional, Sato, H., additional, Scheit, H., additional, Schindler, F., additional, Shimada, T., additional, Shimizu, Y., additional, Shimoura, S., additional, Simon, H., additional, Stefan, I., additional, Storck, S., additional, Stuhl, L., additional, Suzuki, H., additional, Symochko, D., additional, Takeda, H., additional, Takeuchi, S., additional, Tanaka, J., additional, Togano, Y., additional, Tomai, T., additional, Törnqvist, H. T., additional, Tronchin, E., additional, Tscheuschner, J., additional, Uesaka, T., additional, Wagner, V., additional, Wimmer, K., additional, Yamada, H., additional, Yang, B., additional, Yang, L., additional, Yasuda, Y., additional, Yoneda, K., additional, Zanetti, L., additional, and Zenihiro, J., additional

Published
2021
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37. Experimental study of 4n with 8He(p,2p) reaction

Author

Huang, S. W., Marqués, F. M., Achouri, N. L., Ahn, D. S., Aumann, T., Baba, H., Beaumel, D., Böhmer, M., Boretzky, K., Caamano, M., Chiga, N., Cortés, M. L., Cortina, D., Doornenbal, P., Douma, C. A., Dufter, F., Feng, J., Fernández-Domínguez, B., Elekes, Z., Forsberg, U., Fujino, T., Fukuda, N., Gašparić, I., Ge, Z., Gernhauser, R., Gheller, J. M., Gibelin, J., Gillibert, A., Godoy, B. M., Halász, Z., Harada, T., Harakeh, M. N., Hirayama, A., Inabe, N., Isobe, T., Kahlbow, J., Kalantar-Nayestanaki, N., Knösel, M. A., Kobayashi, T., Kondo, Y., Koseoglou, P., Kubota, Y., Kuti, I., Lehr, C., Maeda, Y., Masuoka, S., Matsumoto, M., Mayer, J., Miki, H., Miwa, M., Murray, I., Nakamura, T., Obertelli, A., Orr, N., Otsu, H., Panin, V., Parlog, M., Paschalis, S., Potlog, M., Reichert, S., Revel, A., Rossi, D., Saito, A., Sasano, M., Sato, H., Scheit, H., Schindler, F., Shimada, T., Shimizu, Y., Shimoura, S., Stefan, I., Storck, S., Stuhl, L., Suzuki, H., Symochko, D., Takeda, H., Takeuchi, S., Tanaka, J., Togano, Y., Tomai, T., Törnqvsit, H. T., Tscheuschner, J., Uesaka, T., Wagner, V., Wimmer, K., Yamada, H., Yasuda, Y., Yoneda, K., Zanetti, L., Zenihiro, J., Elidiano, T., and Lenain, C.

Abstract

The tetraneutron has attracted the attention of nuclear physicists during the past decades, but there is still no unambiguous confirmation of its existence or non-existence. A new experiment based on 8He(p,2p)7H{t+4 n} reaction, with direct detection of the four neutrons, has been carried out at RIBF, which can hopefully help to draw a definite conclusion on the tetraneutron system.

Published
2020

38. Experimental study of 4 n with 8He(p,2p) reaction

Author

Huang, S. W., primary, Yang, H., additional, Marqués, F. M., additional, Achouri, N. L., additional, Ahn, D.S., additional, Aumann, T., additional, Baba, H., additional, Beaumel, D., additional, Böhmer, M., additional, Boretzky, K., additional, Caamaño, M., additional, Chen, S., additional, Chiga, N., additional, Cortés, M.L., additional, Cortina, D., additional, Doornenbal, P., additional, Douma, C. A., additional, Dufter, F., additional, Feng, J., additional, Fernández-Domínguez, B., additional, Elekes, Z., additional, Forsberg, U., additional, Fujino, T., additional, Fukuda, N., additional, Gašparić, I., additional, Ge, Z., additional, Gernhäuser, R., additional, Gheller, J. M., additional, Gibelin, J., additional, Gillibert, A., additional, Godoy, B. M., additional, Halász, Z., additional, Harada, T., additional, Harakeh, M. N., additional, Hirayama, A., additional, Inabe, N., additional, Isobe, T., additional, Kahlbow, J., additional, Kalantar-Nayestanaki, N., additional, Kim, D., additional, Kim, S., additional, Knösel, M. A., additional, Kobayashi, T., additional, Kondo, Y., additional, Koseoglou, P., additional, Kubota, Y., additional, Kuti, I., additional, Lehr, C., additional, Li, P. J., additional, Liu, Y., additional, Maeda, Y., additional, Masuoka, S., additional, Matsumoto, M., additional, Mayer, J., additional, Miki, H., additional, Miwa, M., additional, Murray, I., additional, Nakamura, T., additional, Obertelli, A., additional, Orr, N., additional, Otsu, H., additional, Panin, V., additional, Park, S., additional, Parlog, M., additional, Paschalis, S., additional, Potlog, M., additional, Reichert, S., additional, Revel, A., additional, Rossi, D., additional, Saito, A., additional, Sasano, M., additional, Sato, H., additional, Scheit, H., additional, Schindler, F., additional, Shimada, T., additional, Shimizu, Y., additional, Shimoura, S., additional, Stefan, I., additional, Storck, S., additional, Stuhl, L., additional, Suzuki, H., additional, Symochko, D., additional, Takeda, H., additional, Takeuchi, S., additional, Tanaka, J., additional, Togano, Y., additional, Tomai, T., additional, Törnqvsit, H. T., additional, Tscheuschner, J., additional, Uesaka, T., additional, Wagner, V., additional, Wimmer, K., additional, Yamada, H., additional, Yang, B., additional, Yang, L., additional, Yasuda, Y., additional, Yoneda, K., additional, Zanetti, L., additional, Zenihiro, J., additional, Elidiano, T., additional, and Lenain, C., additional

Published
2020
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39. Lifetime measurement of the 260 g.s. at SAMURAI

Author

Storck, S, primary, Caesar, C, additional, Kahlbow, J, additional, Panin, V, additional, Ahn, D S, additional, Atar, L, additional, Aumann, T, additional, Baba, H, additional, Boretzky’, K, additional, Chae, H, additional, Chiga, N, additional, Choi, S, additional, Cortés, M L, additional, Cortina-Gil, D, additional, Deshayes, Q, additional, Doornenbal, P, additional, Elekes, Z, additional, Fukuda, N, additional, Gašparić, I, additional, Hahn, K I, additional, Halász, Z, additional, Hirayama, A, additional, Hwang, J, additional, Inabe, N, additional, Isobe, T, additional, Kim, S, additional, Kobayashi, T, additional, Körper, D, additional, Marques, M, additional, Matsumoto, M, additional, Murakami, T, additional, Murray, I, additional, Nakamura, T, additional, Nilsson, T, additional, Otsu, H, additional, Paschalis, S, additional, Parlog, M, additional, Petri, M, additional, Rossi, D, additional, Saito, A, additional, Sasano, M, additional, Scheit, H, additional, Schrock, P, additional, Shimizu, Y, additional, Simon, H, additional, Sohler, D, additional, Sorlin, O, additional, Stuhl, L, additional, Suzuki, H, additional, Syndikus, I, additional, Takeda, H, additional, Törnqvist, H, additional, Togano, Y, additional, Tomai, T, additional, Uesaka, T, additional, Yamada, H, additional, Yang, Z, additional, Yasuda, M, additional, and Yoneda, K I, additional

Published
2020
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40. Study of spin-isospin response of 11Li neutron-drip-line nucleus with PANDORA

Author

Stuhl, L., primary, Sasano, M., additional, Gao, J., additional, Hirai, Y., additional, Yako, K., additional, Wakasa, T., additional, Ahn, D. S., additional, Baba, H., additional, Chilug, A. I., additional, Franchoo, S., additional, Fujino, Y., additional, Fukuda, N., additional, Gibelin, J., additional, Hahn, I. S., additional, Halász, Z., additional, Harada, T., additional, Harakeh, M. N., additional, Inomoto, D., additional, Isobe, T., additional, Kasahara, H., additional, Kim, D., additional, Kiss, G. G., additional, Kobayashi, T., additional, Kondo, Y., additional, Korkulu, Z., additional, Koyama, S., additional, Kubota, Y., additional, Kurihara, A., additional, Liu, H. N., additional, Matsumoto, M., additional, Michimasa, S., additional, Miki, H., additional, Miwa, M., additional, Motobayashi, T., additional, Nakamura, T., additional, Nishimura, M., additional, Otsu, H., additional, Panin, V., additional, Park, S., additional, Saito, A. T., additional, Sakai, H., additional, Sato, H., additional, Shimada, T., additional, Shimizu, Y., additional, Shimoura, S., additional, Spiridon, A., additional, Stefanescu, I. C., additional, Sun, X., additional, Sun, Y. L., additional, Suzuki, H., additional, Togano, Y., additional, Tomai, T., additional, Trache, L., additional, Tudor, D., additional, Uesaka, T., additional, Yamada, H., additional, Yang, Z., additional, Yasuda, M., additional, Yoneda, K., additional, Yoshida, K., additional, Zenihiro, J., additional, and Zhang, N., additional

Published
2020
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41. Extending the Southern Shore of the Island of Inversion to F-28

Author

Revel, A., Sorlin, O., Marques, 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., Dombradi, Z., Douma, C. A., Elekes, Z., Fallon, P., Gasparic, I, Gheller, J-M, Gibelin, J., Gillibert, A., Harakeh, M. N., He, W., Hirayama, A., Hoffman, C. R., Holl, M., Horvat, A., Horvath, A., Hwang, J. W., Isobe, T., Kalantar-Nayestanaki, N., Kawase, S., Kim, S., Kisamori, K., Kobayashi, T., Koerper, 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., Santos, F. de Oliveira, 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., Tornqvist, H., Togano, Y., Tomai, T., Tscheuschner, J., Tsubota, J., Uesaka, T., Yang, Z., Yasuda, M., Yoneda, K., Revel, A., Sorlin, O., Marques, 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., Dombradi, Z., Douma, C. A., Elekes, Z., Fallon, P., Gasparic, I, Gheller, J-M, Gibelin, J., Gillibert, A., Harakeh, M. N., He, W., Hirayama, A., Hoffman, C. R., Holl, M., Horvat, A., Horvath, A., Hwang, J. W., Isobe, T., Kalantar-Nayestanaki, N., Kawase, S., Kim, S., Kisamori, K., Kobayashi, T., Koerper, 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., Santos, F. de Oliveira, 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., Tornqvist, H., Togano, Y., Tomai, T., Tscheuschner, J., Tsubota, J., Uesaka, T., Yang, Z., Yasuda, M., and Yoneda, K.

Abstract

Detailed spectroscopy of the neutron-unbound nucleus F-28 has been performed for the first time following proton/neutron removal from Ne-29/F-29 beams at energies around 230 MeV=nucleon. The invariant-mass spectra were reconstructed for both the F-27((*)) + n and F-26((*)) + 2n coincidences and revealed a series of well-defined resonances. A near-threshold state was observed in both reactions and is identified as the F-28 ground state, with S-n(F-28) = -199(6) keV, while analysis of the 2n decay channel allowed a considerably improved S-n(F-27) = 1620(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 F-28. Importantly, in the case of the ground state, the reconstructed F-27 + n momentum distribution following neutron removal from F-29 indicates that it arises mainly from the 1p(3/2) neutron intruder configuration. This demonstrates that the island of inversion around N = 20 includes F-28, and most probably F-29, and suggests that O-28 is not doubly magic.

Published
2020

42. Experimental study of 4n with 8He(p,2p) reaction

Author

RIKEN Nishina Center for Accelerator-Based Science, German Research Foundation, Federal Ministry of Education and Research (Germany), Huang, S. V., Yang, H., Marqués, F.M., Achouri, N.L., Ahn, D.S., Aumann, T., Baba, H., Beaumel, D., Böhmer, M., Boretzky, K., Caamano, M., Uesaka, T., Wagner, V., Wimmer, K., Yamada, H., Yang, B., Yang, L., Yasuda, Y., Yoneda, K., Zanetti, L., Zenihiro, J., Elidiano, T., Lenain, C., Chen, S., Chiga, N., Cortés, M.L., Cortina, D., Doornenbal, P., Douma, C.A., Dufter, F., Feng, J., Fernández-Domínguez, B., Elekes, Z., Forsberg, U., Fujino, T., Fukuda, N., Gašparić, I., Ge, Z., Gernhäuser, R., Gheller, J.M., Gibelin, J., Gillibert, A., Godoy, B.M., Halász, Z., Harada, T., Harakeh, M.N., Hirayama, A., Inabe, N., Isobe, T., Kahlbow, J., Kalantar-Nayestanaki, N., Kim, D., Knösel, M.A., Kobayashi, T., Kondo, Y., Koseoglou, P., Kubota, Y., Kuti, I., Lehr, C., Li, P.J., Liu, Y., Maeda, Y., Masuoka, S., Matsumoto, M., Mayer, J., Miki, H., Miwa, M., Murray, I., Nakamura, T., Obertelli, A., Orr, N., Otsu, H., Panin, V., Park, S., Parlog, M., Paschalis, S., Potlog, M., Reichert, S., Revel, A., Rossi, D., Saito, A., Sasano, M., Sato, H., Scheit, H., Schindler, F., Shimada, T., Shimizu, Y., Shimoura, S., Stefan, I., Storck, Sonja, Stuhl, L., Suzuki, H., Symochko, D., Takeda, H., Takeuchi, S., Tanaka, J., Togano, Y., Tomai, T., Törnqvsit, H.T., Tscheuschner, J., RIKEN Nishina Center for Accelerator-Based Science, German Research Foundation, Federal Ministry of Education and Research (Germany), Huang, S. V., Yang, H., Marqués, F.M., Achouri, N.L., Ahn, D.S., Aumann, T., Baba, H., Beaumel, D., Böhmer, M., Boretzky, K., Caamano, M., Uesaka, T., Wagner, V., Wimmer, K., Yamada, H., Yang, B., Yang, L., Yasuda, Y., Yoneda, K., Zanetti, L., Zenihiro, J., Elidiano, T., Lenain, C., Chen, S., Chiga, N., Cortés, M.L., Cortina, D., Doornenbal, P., Douma, C.A., Dufter, F., Feng, J., Fernández-Domínguez, B., Elekes, Z., Forsberg, U., Fujino, T., Fukuda, N., Gašparić, I., Ge, Z., Gernhäuser, R., Gheller, J.M., Gibelin, J., Gillibert, A., Godoy, B.M., Halász, Z., Harada, T., Harakeh, M.N., Hirayama, A., Inabe, N., Isobe, T., Kahlbow, J., Kalantar-Nayestanaki, N., Kim, D., Knösel, M.A., Kobayashi, T., Kondo, Y., Koseoglou, P., Kubota, Y., Kuti, I., Lehr, C., Li, P.J., Liu, Y., Maeda, Y., Masuoka, S., Matsumoto, M., Mayer, J., Miki, H., Miwa, M., Murray, I., Nakamura, T., Obertelli, A., Orr, N., Otsu, H., Panin, V., Park, S., Parlog, M., Paschalis, S., Potlog, M., Reichert, S., Revel, A., Rossi, D., Saito, A., Sasano, M., Sato, H., Scheit, H., Schindler, F., Shimada, T., Shimizu, Y., Shimoura, S., Stefan, I., Storck, Sonja, Stuhl, L., Suzuki, H., Symochko, D., Takeda, H., Takeuchi, S., Tanaka, J., Togano, Y., Tomai, T., Törnqvsit, H.T., and Tscheuschner, J.

Abstract

The tetraneutron has attracted the attention of nuclear physicists during the past decades, but there is still no unambiguous confirmation of its existence or nonexistence. A new experiment based on 8 He(p,2p)7H{t+4n} reaction, with direct detection of the four neutrons, has been carried out at RIBF, which can hopefully help to draw a definite conclusion on the tetraneutron system.

Published
2020

43. Proton elastic scattering at 200 A MeV and high momentum transfers of 1.7–2.7 fm−1 as a probe of the nuclear matter density of 6He

Author

Chebotaryov, S, primary, Sakaguchi, S, additional, Uesaka, T, additional, Akieda, T, additional, Ando, Y, additional, Assie, M, additional, Beaumel, D, additional, Chiga, N, additional, Dozono, M, additional, Galindo-Uribarri, A, additional, Heffron, B, additional, Hirayama, A, additional, Isobe, T, additional, Kaki, K, additional, Kawase, S, additional, Kim, W, additional, Kobayashi, T, additional, Kon, H, additional, Kondo, Y, additional, Kubota, Y, additional, Leblond, S, additional, Lee, H, additional, Lokotko, T, additional, Maeda, Y, additional, Matsuda, Y, additional, Miki, K, additional, Milman, E, additional, Motobayashi, T, additional, Mukai, T, additional, Nakai, S, additional, Nakamura, T, additional, Ni, A, additional, Noro, T, additional, Ota, S, additional, Otsu, H, additional, Ozaki, T, additional, Panin, V, additional, Park, S, additional, Saito, A, additional, Sakai, H, additional, Sasano, M, additional, Sato, H, additional, Sekiguchi, K, additional, Shimizu, Y, additional, Stefan, I, additional, Stuhl, L, additional, Takaki, M, additional, Taniue, K, additional, Tateishi, K, additional, Terashima, S, additional, Togano, Y, additional, Tomai, T, additional, Wada, Y, additional, Wakasa, T, additional, Wakui, T, additional, Watanabe, A, additional, Yamada, H, additional, Yang, Zh, additional, Yasuda, M, additional, Yasuda, J, additional, Yoneda, K, additional, and Zenihiro, J, additional

Published
2018
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47. CSF neuropeptides in euthymic bipolar patients and controls.

Author

Berrettini, W H, Nurnberger, J I Jr, Zerbe, R L, Gold, P W, Chrousos, G P, and Tomai, T

Abstract

Levels of vasopressin, somatostatin, neurotensin, vasoactive intestinal peptide, corticotrophin-releasing factor and adrenocorticotrophin in CSF were determined in lithium-treated and unmedicated euthymic bipolar patients and controls, in a search for a trait marker in affective disorder. No group differences in levels of these peptides were found. Highly significant positive correlations were found among these peptides (with the exception of neurotensin), suggesting that their presence in CSF is functionally significant, as opposed to the result of random diffusion from the interstitial space of the brain. [ABSTRACT FROM AUTHOR]

Published
1987
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49. Isotope-production cross sections of residual nuclei in proton- and deuteron-induced reactions on 93Zr at 50 MeV/u

Author

Nakano Keita, Watanabe Yukinobu, Kawase Shoichiro, Wang He, Otsu Hideaki, Sakurai Hiroyoshi, Chiga Nobuyuki, Suwa Junki, Sumikama Toshiyuki, Takeuchi Satoshi, Nakamura Takashi, Chikaato Kazuya, Takechi Maya, Koyama Shunpei, Soon Ahn Deuk, Baba Hidetada, Chen Sidong, Cortes Martha Liliana, Doornenbal Pieter, Fukuda Naoki, Hirayama Akihiro, Hosoda Ryohei, Isobe Tadaaki, Kawakami Shunsuke, Kondo Yosuke, Kubono Shigeru, Maeda Yukie, Masuoka Shoichiro, Michimasa Shin’ichiro, Murray Ian, Nakajima Ryo, Niikura Megumi, Ozaki Tomoyuki, Saito Atsumi, Saito Takeshi, Sato Hiromi, Shimizu Yohei, Shimoura Susumu, Soudo Yoshiki, Söderström Pär-Anders, Sun Xiaohui, Suzuki Daisuke, Suzuki Hiroshi, Takeda Hiroyuki, Togano Yasuhiro, Tomai Takato, Yamada Hiroki, Yasuda Masahiro, and Yoshida Koichi

Subjects
Physics, QC1-999
Abstract

The isotope-production cross sections in p- and d-induced reactions on 93Zr at approximately 50 MeV/nucleon were measured by using the inverse-kinematics method at RIKEN RI Beam Factory. The measured data were compared with the previous experimental 93Zr + p, d at 105 and 209 MeV/nucleon data. This comparison represents that the isotopic distribution of production cross sections at 51 MeV p-induced reaction is appreciably different from those at 105 and 209 MeV. On the other hand, these three data sets show that the shape of isotopic distribution is similar in the case of the d-induced reaction. Also, the measured production cross sections were compared with the theoretical model calculations with Particle and Heavy Ion Transport code System (PHITS) version 3.10 in order to investigate the reproducibility of the models implemented in PHITS. The calculations well reproduced the experimental data even in such low incident energy, while several discrepancies were still seen as in the p- and d-induced reactions at 105 and 209 MeV/nucleon.

Published
2020
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50. Cerebrospinal fluid concentrations of corticotropinreleasing hormone CRH and corticotropin ACTH are reduced in patients with Alzheimer's disease

Author

May, C., Rapoport, S. I., Tomai, T. P., Chrousos, G. P., and Gold, P. W.

Abstract

We examined corticotropin-releasing hormone-like immunoreactivity (CRH-LI) and corticotropin (ACTH) levels in the CSF of 33 patients with presumptive Alzheimer's disease (AD) and 13 healthy, age-matched controls. The mean CRH-LI and ACTH levels of the AD patients were significantly less than controls. Despite these reductions, none of the patients had evidence of pituitary-adrenal dysfunction. A disorder of extrahypothalamic CRH may be involved in the pathophysiology of AD.

Published
1987

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