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NSR database version of April 11, 2024.

Search: Author = N.Tsunoda

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2023KO15      Nature(London) 620, 965 (2023)

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

First observation of 28O

NUCLEAR REACTIONS H(29F, X)27O/28O, E=235 MeV/nucleon; measured reaction products; deduced yields. The hydrogen target was surrounded by the MINOS Time Projection Chamber, SAMURAI spectrometer, RIKEN RI Beam Factory.

RADIOACTIVITY 28O(4n), 27O(3n); measured decay products, En, In; deduced decay energy spectra and schemes from the measured momenta using the invariant-mass technique, resonance parameters. Comparison with the large-scale shell-model calculations using the new chiral effective field theory (EEdf3) interaction.

doi: 10.1038/s41586-023-06352-6
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2020BA27      Phys.Rev.Lett. 124, 222504 (2020)

S.Bagchi, R.Kanungo, Y.K.Tanaka, H.Geissel, P.Doornenbal, W.Horiuchi, G.Hagen, T.Suzuki, N.Tsunoda, D.S.Ahn, H.Baba, K.Behr, F.Browne, S.Chen, M.L.Cortes, A.Estrade, N.Fukuda, M.Holl, K.Itahashi, N.Iwasa, G.R.Jansen, W.G.Jiang, S.Kaur, A.O.Macchiavelli, S.Y.Matsumoto, S.S.Momiyama, I.Murray, T.Nakamura, S.J.Novario, H.J.Ong, T.Otsuka, T.Papenbrock, S.Paschalis, A.Prochazka, C.Scheidenberger, P.Schrock, Y.Shimizu, D.Steppenbeck, H.Sakurai, D.Suzuki, H.Suzuki, M.Takechi, H.Takeda, S.Takeuchi, R.Taniuchi, K.Wimmer, K.Yoshida

Two-Neutron Halo is Unveiled in 29F

NUCLEAR REACTIONS C(29F, X), E=255 MeV/nucleon; C(27F, X), E=250 MeV/nucleon; measured reaction products, En, In. 27,29F; deduced two-neutron Borromean halo. Comparison with theoretical calculations.

doi: 10.1103/PhysRevLett.124.222504
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2672. Data from this article have been entered in the XUNDL database. For more information, click here.


2020KI19      Phys.Rev. C 102, 054318 (2020)

N.Kitamura, K.Wimmer, N.Shimizu, V.M.Bader, C.Bancroft, D.Barofsky, T.Baugher, D.Bazin, J.S.Berryman, V.Bildstein, A.Gade, N.Imai, T.Kroll, C.Langer, J.Lloyd, E.Lunderberg, G.Perdikakis, F.Recchia, T.Redpath, S.Saenz, D.Smalley, S.R.Stroberg, J.A.Tostevin, N.Tsunoda, Y.Utsuno, D.Weisshaar, A.Westerberg

Structure of 30Mg explored via in-beam γ-ray spectroscopy

NUCLEAR REACTIONS 9Be(31Mg, 30Mg), E=97.9 MeV; 9Be(32Mg, 30Mg), E=99.1 MeV; 9Be(34Si, 30Mg), E=94.8 MeV; 9Be(35P, 30Mg), E=102.3 MeV, [secondary beams from 9Be(48Ca, X), E=140 MeV/nucleon, followed by separation of fragments using A1900 separator for beam purification at NSCL-MSU facility]; measured reaction products using S800 spectrometer, Eγ, Iγ, γγ-coin, Doppler-corrected add-back γ-ray spectra using the Gamma-Ray Energy Tracking In-beam Nuclear Array (GRETINA) of seven modules, each module housing four HPGe crystals. 30Mg; deduced levels, J, π, population σ of levels, spectroscopic factors, parallel momentum distributions; calculated T-plots in (Q0, Q2) plane. Comparison with shell-model calculations using the SDPF-M and EEdf1 interactions for all states. Systematics of low-energy levels in 30Mg, 32Si, 34S, 36Ar, 38Ca. Relevance to "island of inversion".

doi: 10.1103/PhysRevC.102.054318
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2020NI05      Phys.Rev. C 102, 054327 (2020)

H.Nishibata, K.Tajiri, T.Shimoda, A.Odahara, S.Morimoto, S.Kanaya, A.Yagi, H.Kanaoka, M.R.Pearson, C.D.P.Levy, M.Kimura, N.Tsunoda, T.Otsuka

Structure of the neutron-rich nucleus 30Mg

RADIOACTIVITY 30Na(β-), (β-n), (β-2n)[nuclear-spin-polarized radioactive beam of 28-keV 30Na from U(p, X), E=500 MeV at TRIUMF cyclotron]; measured Eγ, Iγ, γγ and βγ-coin, γγ(θ), β(θ) from spin-polarized 30Na source, isomer half-life by centroid shift of βγ(t) spectrum using eight sets of detector telescopes consisting of a coaxial high-purity Ge detector (HPGe) and thin plastic scintillator at ISAC-TRIUMF facility. 30Mg; deduced levels, J, π, bands, M1 scissors mode, multipolarities, asymmetry parameters for β transitions, β feedings, logft. 30Na; deduce J, π of the ground state, %β-n or Pn and %β-2n or P2n. Comparison with CHFB + LQRPA, AMD + GCM, and large-scale shell model with the EEdf1 interaction, and with previous experimental data.

COMPILATION 30Mg; compiled levels, J, π from literature, and evaluation in the ENSDF database.

doi: 10.1103/PhysRevC.102.054327
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2020TS03      Nature(London) 587, 66 (2020)

N.Tsunoda, T.Otsuka, K.Takayanagi, N.Shimizu, T.Suzuki, Y.Utsuno, S.Yoshida, H.Ueno

The impact of nuclear shape on the emergence of the neutron dripline

NUCLEAR STRUCTURE 22,24,26,28,30,32,34,36Ne, 24,26,28,30,32,34,36,38,40,42Mg, 23,25,27,29,31,33,35,37Na, 19,21,23,25,27,29F; analyzed available data; calculated 2+ and 4+ energies using configuration interaction, ground-state energies, dripline, magic numbers, J, π and energy levels using nucleon-nucleon interactions, nuclear shapes. Comparison with ENSDF library, available data; deduced mechanism for the formation of the neutron dripline.

doi: 10.1038/s41586-020-2848-x
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2019MA29      Phys.Rev. C 99, 044320 (2019)

A.Matta, W.N.Catford, N.A.Orr, J.Henderson, P.Ruotsalainen, G.Hackman, A.B.Garnsworthy, F.Delaunay, R.Wilkinson, G.Lotay, Na.Tsunoda, T.Otsuka, A.J.Knapton, G.C.Ball, N.Bernier, C.Burbadge, A.Chester, D.S.Cross, S.Cruz, C.Aa.Diget, T.Domingo, T.E.Drake, L.J.Evitts, F.H.Garcia, S.Hallam, E.MacConnachie, M.Moukaddam, D.Muecher, E.Padilla-Rodal, O.Paetkau, J.Park, J.L.Pore, U.Rizwan, J.Smallcombe, J.K.Smith, K.Starosta, C.E.Svensson, J.Williams, M.Williams

Shell evolution approaching the N-20 island of inversion: Structure of 29Mg

NUCLEAR REACTIONS 2H(28Mg, p), E=8.0 MeV/nucleon, [secondary 28Mg beam from C(p, X), E=520 MeV primary reaction at the ISAC2 of TRIUMF]; measured Ep, Ip, Eγ, Iγ, (recoil)γ-coin, and differential σ(θ) using SHARC array of double-sided silicon strip detectors, TIGRESS array of HPGe detectors, and TRIFOIL plastic scintillator. 29Mg; deduced levels, J, π, spectroscopic factors. Comparison with shell model calculations. Systematics of intruder states in 25,27,29,31Mg.

NUCLEAR STRUCTURE 29Mg; calculated levels, J, π, neutron occupancies using shell model with EEdf1 interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.99.044320
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2019MU03      Phys.Rev. C 99, 011302 (2019)

I.Murray, M.MacCormick, D.Bazin, P.Doornenbal, N.Aoi, H.Baba, H.Crawford, P.Fallon, K.Li, J.Lee, M.Matsushita, T.Motobayashi, T.Otsuka, H.Sakurai, H.Scheit, D.Steppenbeck, S.Takeuchi, J.A.Tostevin, N.Tsunoda, Y.Utsuno, H.Wang, K.Yoneda

Spectroscopy of strongly deformed 32Ne by proton knockout reactions

NUCLEAR REACTIONS 9Be(33Na, 32Ne), (34Mg, 32Ne), E=235, 221 MeV/nucleon; measured reaction products, Eγ, Iγ, γγ-coin, time of flight and energy loss, σ for one- and two-proton knockout reactions populating levels in 32Ne using the ZeroDegree spectrometer for particle identification and the DALI2 array for γ detection at the RIKEN-RIBF facility. 32Ne; deduced first 2+ and 4+ levels, configuration, E(first 4+)/E(first 2+) ratio. Systematics of energies of the first 2+ and 4+ levels in 26,28,30,32,34,36Ne, 28,30,32,34,36,38Mg, 30,32,34,36,38,40Si. Systematics of cross sections of two-proton knockout reactions for residues of 26,28,30,32Ne. Comparison of experimental inclusive and exclusive reaction cross sections with shell-model and eikonal reaction dynamical calculations.

doi: 10.1103/PhysRevC.99.011302
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2623. Data from this article have been entered in the XUNDL database. For more information, click here.


2019NI04      Phys.Rev. C 99, 024322 (2019)

H.Nishibata, S.Kanaya, T.Shimoda, A.Odahara, S.Morimoto, A.Yagi, H.Kanaoka, M.R.Pearson, C.D.P.Levy, M.Kimura, N.Tsunoda, T.Otsuka

Structure of 31Mg: Shape coexistence revealed by β-ψ spectroscopy with spin-polarized 31Na

RADIOACTIVITY 31Na(β-), (β-n)[from 238U(p, X), E=500 MeV, followed by high-resolution mass separation and spin-polarization of 31Na beam at ISAC-I-TRIUMF facility]; measured β spectra, polarization asymmetry of β particles emitted by the decay of 31Na, Eβ, Iβ, Eγ, Iγ, βγ(θ), γ(polarization), βγ- and γγ-coin, half-life of the 50-keV level in 31Mg by βγ(t) using thin plastic scintillators for β- detection and Ge detectors for γ detection at TRIUMF. 31Mg; deduced levels, J, π, %β-n and %β-2n, deformed rotational bands with Kπ=1/2+ and 1/2-. 31Mg(β-)[from 31Na β- decay]; observed γ rays. Comparison with previous experimental data, and with theoretical calculations. Systematics of energies of the lowest 1/2+, 3/2+, 3/2-, and 7/2- levels in 31Mg, 33Si, 35S, 37Ar, 39Ca.

NUCLEAR STRUCTURE 31Mg; calculated levels, J, π using antisymmetrized molecular dynamics (AMD) plus generator coordinate method (GCM), and shell model with the EEdf1 interaction, microscopically derived from chiral effective field theory. Comparison with experimental data.

COMPILATION 31Mg; compiled and discussed experimental and evaluated data for levels, J, π from 1984 to 2013.

doi: 10.1103/PhysRevC.99.024322
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2018FE05      Phys.Lett. B 779, 124 (2018)

B.Fernandez-Dominguez, B.Pietras, W.N.Catford, N.A.Orr, M.Petri, M.Chartier, S.Paschalis, N.Patterson, J.S.Thomas, M.Caamano, T.Otsuka, A.Poves, N.Tsunoda, N.L.Achouri, J.-C.Angelique, N.I.Ashwood, A.Banu, B.Bastin, R.Borcea, J.Brown, F.Delaunay, S.Franchoo, M.Freer, L.Gaudefroy, S.Heil, M.Labiche, B.Laurent, R.C.Lemmon, A.O.Macchiavelli, F.Negoita, E.S.Paul, C.Rodriguez-Tajes, P.Roussel-Chomaz, M.Staniou, M.J.Taylor, L.Trache, G.L.Wilson

Re-examining the transition into the N = 20 island of inversion: Structure of 30Mg

NUCLEAR REACTIONS C(31Mg, n)30Mg, E=55.1 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies and intensities, J, π, single-particle σ, spectroscopic factors. Comparison with shell model calculations.

doi: 10.1016/j.physletb.2018.02.002
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0931. Data from this article have been entered in the XUNDL database. For more information, click here.


2018LO20      Phys.Rev.Lett. 121, 262501 (2018)

C.Loelius, N.Kobayashi, H.Iwasaki, D.Bazin, J.Belarge, P.C.Bender, B.A.Brown, R.Elder, B.Elman, A.Gade, M.Grinder, S.Heil, A.Hufnagel, B.Longfellow, E.Lunderberg, M.Mathy, T.Otsuka, M.Petri, I.Syndikus, N.Tsunoda, D.Weisshaar, K.Whitmore

Enhanced Electric Dipole Strength for the Weakly Bound States in 27Ne

NUCLEAR REACTIONS 9Be(29Na, 27Ne), E=90.5 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, B(E1). Comparison with he shell-model calculations with the WBP-M and EEdf1 interactions.

doi: 10.1103/PhysRevLett.121.262501
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2018XU05      Phys.Lett. B 782, 619 (2018)

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

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

NUCLEAR MOMENTS 32,34Al; measured transition frequencies using β-NMR/NQR techniques; deduced nuclear g factor and quadrupole moments. Comparison with large-scale shell-model calculations using several effective interactions.

doi: 10.1016/j.physletb.2018.06.009
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2017TS01      Phys.Rev. C 95, 021304 (2017)

N.Tsunoda, T.Otsuka, N.Shimizu, M.Hjorth-Jensen, K.Takayanagi, T.Suzuki

Exotic neutron-rich medium-mass nuclei with realistic nuclear forces

NUCLEAR STRUCTURE 20,22,24,26,28,30,32Ne, 24,26,28,30,32,34Mg, 28,30,32,34,36Si; calculated energies of the first 2+ and 4+ states, B(E2), expectation values of the number of the particle-hole excitations in the ground states of Mg isotopes. 31,32Mg; calculated levels, J, π. 28O, 30Ne, 32Mg, 34Si, 36S, 38Ar, 40Ca; calculated effective neutron single-particle energies (ESPEs) of N=20 isotones. Extended Kuo-Krenciglowa (EKK) theory of effective nucleon-nucleon interaction for exotic nuclei. Comparison with experimental data.

doi: 10.1103/PhysRevC.95.021304
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2014TS01      Phys.Rev. C 89, 024313 (2014)

N.Tsunoda, K.Takayanagi, M.Hjorth-Jensen, T.Otsuka

Multi-shell effective interactions

NUCLEAR STRUCTURE 18O, 18F, 42Ca, 42Sc; calculated nucleon-nucleon effective interaction for shell-model calculations for degenerate and nondegenerate model spaces. 42Ca, 42Sc; calculated levels, J, π, two-body matrix elements. Kuo-Krenciglowa (KK) and extended KK (EKK) methods. Comparison with experimental values.

doi: 10.1103/PhysRevC.89.024313
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2013TA19      J.Phys.:Conf.Ser. 445, 012003 (2013)

K.Takayanagi, N.Tsunoda, M.Hjorth-Jensen, T.Otsuka

Effective Hamiltonian in non-degenerate model space

doi: 10.1088/1742-6596/445/1/012003
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2012YU07      Phys.Rev. C 85, 064324 (2012)

C.Yuan, T.Suzuki, T.Otsuka, F.Xu, N.Tsunoda

Shell-model study of boron, carbon, nitrogen, and oxygen isotopes with a monopole-based universal interaction

NUCLEAR STRUCTURE 10,12Be, 10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25B, 12,13,14,15,16,17,18,19,20,21,22,23,24,25,26C, 14,15,16,17,18,19,20,21,22,23,24,25,26,27N, 15,16,17,18,19,20,21,22,23,24,25,26,27,28O; calculated ground-state energies, levels, J, π, S(n), S(2n), quadrupole moments, magnetic dipole moments, B(E2), B(GT) using Shell-model. Comparison with experimental data.

doi: 10.1103/PhysRevC.85.064324
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2011TS07      Phys.Rev. C 84, 044322 (2011)

N.Tsunoda, T.Otsuka, K.Tsukiyama, M.Hjorth-Jensen

Renormalization persistency of the tensor force in nuclei

doi: 10.1103/PhysRevC.84.044322
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2010OT01      Phys.Rev.Lett. 104, 012501 (2010)

T.Otsuka, T.Suzuki, M.Honma, Y.Utsuno, N.Tsunoda, K.Tsukiyama, M.Hjorth-Jensen

Novel Features of Nuclear Forces and Shell Evolution in Exotic Nuclei

NUCLEAR STRUCTURE Z=8-20, 28, 40, N=20, 40-50; 40Ca, 68Ni, 78Ni, 90Zr, 100Sn; calculated monopole matrix elements, single-particle energies for pf and sd-shells; deduced monopole-based universal interaction, shell evolution. Comparison with USD, KB3, GXPF1A interactions.

doi: 10.1103/PhysRevLett.104.012501
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