NSR Query Results
Output year order : Descending NSR database version of April 24, 2024. Search: Author = Y.X.Watanabe Found 67 matches. 2024IM02 Phys.Lett. B 850, 138470 (2024) N.Imai, M.Dozono, S.Michimasa, T.Sumikama, S.Ota, S.Hayakawa, J.W.Hwang, K.Iribe, C.Iwamoto, S.Kawase, K.Kawata, N.Kitamura, S.Masuoka, K.Nakano, P.Schrock, D.Suzuki, R.Tsunoda, K.Wimmer, D.S.Ahn, O.Beliuskina, N.Chiga, N.Fukuda, E.Ideguchi, K.Kusaka, H.Miki, H.Miyatake, D.Nagae, S.Ohmika, M.Ohtake, H.J.Ong, H.Otsu, H.Sakurai, H.Shimizu, Y.Shimizu, X.Sun, H.Suzuki, M.Takaki, H.Takeda, S.Takeuchi, T.Teranishi, Y.Watanabe, Y.X.Watanabe, K.Yako, H.Yamada, H.Yamaguchi, L.Yang, R.Yanagihara, Y.Yanagisawa, K.Yoshida, S.Shimoura Neutron capture reaction cross-section of 79Se through the 79Se(d, p) reaction in inverse kinematics NUCLEAR REACTIONS 2H(77Se, p), (79Se, p), E=20 MeV/nucleon; measured reaction products, Eγ, Iγ. 78,80Se; deduced γ-ray energies, γ-emission probabilities, σ, isomer ratio. Comparison with available data, TALYS and code DWUCK5 calculations. The surrogate-ratio method, the RI Beam Factory operated by the RIKEN Nishina Center and the Center for Nuclear Studies (CNS), University of Tokyo, by employing the novel "optimized energy degrading optics" (OEDO) for radioactive isotope (RI) beams.
doi: 10.1016/j.physletb.2024.138470
2024XI06 Phys.Rev. C 109, 035804 (2024) W.Xian, S.Chen, S.Nikas, M.Rosenbusch, M.Wada, H.Ishiyama, D.Hou, S.Iimura, S.Nishimura, P.Schury, A.Takamine, S.Yan, F.Browne, P.Doornenbal, F.Flavigny, Y.Hirayama, Y.Ito, S.Kimura, T.M.Kojima, J.Lee, J.Liu, H.Miyatake, S.Michimasa, J.Y.Moon, S.Naimi, T.Niwase, T.Sonoda, D.Suzuki, Y.X.Watanabe, V.Werner, K.Wimmer, H.Wollnik Mass measurements of neutron-rich A ≈ 90 nuclei constrain element abundances
doi: 10.1103/PhysRevC.109.035804
2023HO11 Phys.Rev. C 108, 054312 (2023) D.S.Hou, A.Takamine, M.Rosenbusch, W.D.Xian, S.Iimura, S.D.Chen, M.Wada, H.Ishiyama, P.Schury, Z.M.Niu, H.Z.Liang, S.X.Yan, P.Doornenbal, Y.Hirayama, Y.Ito, S.Kimura, T.M.Kojima, W.Korten, J.Lee, J.J.Liu, Z.Liu, S.Michimasa, H.Miyatake, J.Y.Moon, S.Naimi, S.Nishimura, T.Niwase, T.Sonoda, D.Suzuki, Y.X.Watanabe, K.Wimmer, H.Wollnik First direct mass measurement for neutron-rich 112Mo with the new ZD-MRTOF mass spectrograph system
doi: 10.1103/PhysRevC.108.054312
2023II01 Phys.Rev.Lett. 130, 012501 (2023) S.Iimura, M.Rosenbusch, A.Takamine, Y.Tsunoda, M.Wada, S.Chen, D.S.Hou, W.Xian, H.Ishiyama, S.Yan, P.Schury, H.Crawford, P.Doornenbal, Y.Hirayama, Y.Ito, S.Kimura, T.Koiwai, T.M.Kojima, H.Koura, J.Lee, J.Liu, S.Michimasa, H.Miyatake, J.Y.Moon, S.Naimi, S.Nishimura, T.Niwase, A.Odahara, T.Otsuka, S.Paschalis, M.Petri, N.Shimizu, T.Sonoda, D.Suzuki, Y.X.Watanabe, K.Wimmer, H.Wollnik Study of the N=32 and N=34 Shell Gap for Ti and V by the First High-Precision Multireflection Time-of-Flight Mass Measurements at BigRIPS-SLOWRI ATOMIC MASSES 55Sc, 56,58Ti, 56,57,58,59V; measured TOF; deduced masses, nonexistence of the N=34 empirical two-neutron shell gaps for Ti and V, and the enhanced energy gap in Ca. Comparison with new Monte Carlo shell model calculations. RIKEN's Radioactive Isotope Beam Factory (RIBF).
doi: 10.1103/PhysRevLett.130.012501
2023NI04 Phys.Rev.Lett. 130, 132502 (2023) T.Niwase, Y.X.Watanabe, Y.Hirayama, M.Mukai, P.Schury, A.N.Andreyev, T.Hashimoto, S.Iimura, H.Ishiyama, Y.Ito, S.C.Jeong, D.Kaji, S.Kimura, H.Miyatake, K.Morimoto, J.-Y.Moon, M.Oyaizu, M.Rosenbusch, A.Taniguchi, M.Wada Discovery of New Isotope 241U and Systematic High-Precision Atomic Mass Measurements of Neutron-Rich Pa-Pu Nuclei Produced via Multinucleon Transfer Reactions NUCLEAR REACTIONS 198Pt(238U, X)235U/236U/237U/238U/239U/240U/241U/242U/235Pa/236Pa/237Pa/239Np/240Np/241Np/239Pu/240Pu/241Pu/242Pu, E=10.75 MeV/nucleon; measured reaction products, TOF. 241U; deduced new isotope production. The KEK Isotope Separation System (KISS) for the nuclear spectroscopy of nuclides produced via MNT reactions, installed at the RIKEN Nishina Center. ATOMIC MASSES 235,236,237,238,239,240,241,242U, 235,236,237Pa, 239,240,241Np, 239,240,241,242Pu; measured frequencies (the first excitation step laser wavelength), TOF; deduced mass excesses. Comparison with AME2020 evaluation.
doi: 10.1103/PhysRevLett.130.132502
2022HI07 Phys.Rev. C 106, 034326 (2022) Y.Hirayama, M.Mukai, Y.X.Watanabe, P.Schury, H.Nakada, J.Y.Moon, T.Hashimoto, S.Iimura, S.C.Jeong, M.Rosenbusch, M.Oyaizu, T.Niwase, M.Tajima, A.Taniguchi, M.Wada, H.Miyatake In-gas-cell laser resonance ionization spectroscopy of 200, 201Pt NUCLEAR MOMENTS 198,200,201Pt; measured time-of-flight (TOF) spectra for ions with mass-to-charge-ratios, laser resonance ionization spectra using Multireflection time-of-flight mass spectrograph (MRTOF-MS) at KEK Isotope Separation System (KISS) of RIKEN facility. 200,201Pt; deduced differential mean-square charge radii and isotope shifts relative to those of 198Pt, magnetic dipole and electric quadrupole moments of 201Pt, β2 deformation parameters Comparison with theoretical calculations using symmetry-conserving configuration-mixing (SCCM) with Gogny D1S energy density functionals (SCCM+Gogny D1S), finite-range droplet model (FRDM), and constrained-Hartree-Fock-Bogoliubov (CHFB) theory with five-dimensional collective Hamiltonian (5DCH) based on the Gogny D1 interaction. 201Pt; deduced most likely spin-parity of 5/2-. 198,200,201Pt produced in 198Pt(136Xe, X), E=10.75 MeV/nucleon multi-nucleon transfer reactions.
doi: 10.1103/PhysRevC.106.034326
2022MU10 Phys.Rev. C 105, 034331 (2022) M.Mukai, Y.Hirayama, Y.X.Watanabe, H.Watanabe, H.Koura, S.C.Jeong, H.Miyatake, M.Brunet, S.Ishizawa, F.G.Kondev, G.J.Lane, Yu.A.Litvinov, T.Niwase, M.Oyaizu, Zs.Podolyak, M.Rosenbusch, P.Schury, M.Wada, P.M.Walker Ground-state β-decay spectroscopy of 187Ta RADIOACTIVITY 187Ta(β-)[from W(136Xe, X), E=7.2 MeV/nucleon]; measured Eγ, Iγ, βγ-coin; deduced Iβ feedings, T1/2, logft, Iγ/β-decay. 187W; deduced Eγ, multipolarities, total conversion coefficients (BrIcc calculations). Comparison to KTUY+gross theory, FRDM+QRPA and RHB+pn-RQRPAKEK calculations. Isotope Separation System (KISS) at RIKEN, an argon-gas-cell-based laser ion source combined with an on-line isotope separator.
doi: 10.1103/PhysRevC.105.034331
2021AH02 Phys.Rev. C 103, 054312 (2021) M.Ahmed, Y.X.Watanabe, Y.Hirayama, M.Mukai, J.H.Park, P.Schury, Y.Kakiguchi, A.Ozawa, M.Oyaizu, M.Wada, H.Miyatake β-γ spectroscopy of the 195Os nucleus RADIOACTIVITY 195Os(β-)[ionized 195Os using laser system from 198Pt(136Xe, X), E=9.4 MeV/nucleon at the KEK isotope separation system (KISS) at RIKEN RIBF facility]; measured Eβ, Iβ, Eγ, Iγ, x rays, βγ- and γγ-coin, half-life of 195Os decay using a multisegmented proportional gas counter (MSPGC) for β radiation, and four clover HPGe detectors for γ rays. 195Ir; deduced levels, J, π, Iβ feedings, logft. 195Os; deduced spin and parity of the ground state. Systematics of half-lives of 195,196,197,198,199,200,201,202,203,204,205,206Os, and comparison with theoretical predictions.
doi: 10.1103/PhysRevC.103.054312
2021HI05 Nucl.Instrum.Methods Phys.Res. A997, 165152 (2021) Y.Hirayama, P.Schury, M.Mukai, H.Choi, S.Iimura, Y.X.Watanabe, M.Wada, H.Watanabe, H.Miyatake Three-dimensional tracking multi-segmented proportional gas counter for β-decay spectroscopy of unstable nuclei RADIOACTIVITY 196Ir(β-); measured decay products, Eβ, Iβ; deduced T1/2 and uncertainties.
doi: 10.1016/j.nima.2021.165152
2021NI08 Phys.Rev. C 104, 044617 (2021) T.Niwase, M.Wada, P.Schury, P.Brionnet, S.D.Chen, T.Hashimoto, H.Haba, Y.Hirayama, D.S.Hou, S.Iimura, H.Ishiyama, S.Ishizawa, Y.Ito, D.Kaji, S.Kimura, J.Liu, H.Miyatake, J.Y.Moon, K.Morimoto, K.Morita, D.Nagae, M.Rosenbusch, A.Takamine, T.Tanaka, Y.X.Watanabe, H.Wollnik, W.Xian, S.X.Yan α-decay-correlated mass measurement of 206, 207g, mRa using an α-TOF detector equipped multireflection time-of-flight mass spectrograph system ATOMIC MASSES 206,207,207mRa; measured time-of-flight spectra by α-decay-correlated mass spectroscopy using multireflection time-of-flight mass spectrograph (MRTOF-MS) system, with an α-TOF detector at SHE-Mass-II facility of RIBF-RIKEN; deduced mass excesses, and compared with evaluated data in AME2020. 207mRa; deduced excitation energy of the isomer, J, π. 206,207,207mRa isotopes produced in 159Tb(51V, X), E=306 MeV, followed by separation of evaporation residues using recoil ion separator GARIS-II at RIKEN. RADIOACTIVITY 206,207mRa(α)[from 159Tb(51V, X), E=306 MeV at RIBF-RIKEN]; measured Eα, Iα, T1/2 of decays of 206Ra and 207mRa, excitation energy of the isomer; deduced α-reduced width, configuration. Systematics of spins, parities, Eα, T1/2, α-branching ratios, reduced α widths for 203,203m,205,205m,207,207mRa. 198,199Po, 202,203At, 202,203Rn, 206,207Fr, 207Ra; observed α spectra from decays.
doi: 10.1103/PhysRevC.104.044617
2021SC14 Phys.Rev. C 104, L021304 (2021) P.Schury, T.Niwase, M.Wada, P.Brionnet, S.Chen, T.Hashimoto, H.Haba, Y.Hirayama, D.S.Hou, S.Iimura, H.Ishiyama, S.Ishizawa, Y.Ito, D.Kaji, S.Kimura, H.Koura, J.J.Liu, H.Miyatake, J.-Y.Moon, K.Morimoto, K.Morita, D.Nagae, M.Rosenbusch, A.Takamine, Y.X.Watanabe, H.Wollnik, W.Xian, S.X.Yan First high-precision direct determination of the atomic mass of a superheavy nuclide ATOMIC MASSES 257Db; measured Eα, time-of flight, distribution of time-of-flight (ToF)-correlated α-decay events using multireflection time-of-flight mass spectrograph (MRTOF-MS) at RIKEN Ring Cyclotron facility; deduced A/q and mass excess for each of the 11 observed correlated events assigned to 257Db. Comparison with AME2016 evaluated data. 257Db isotope produced in 208Pb(51V, 2n), E=306 MeV reaction, followed by separation of fragments using GARIS-II separator.
doi: 10.1103/PhysRevC.104.L021304
2021WA15 Phys.Lett. B 814, 136088 (2021) H.Watanabe, Y.X.Watanabe, Y.Hirayama, A.N.Andreyev, T.Hashimoto, F.G.Kondev, G.J.Lane, Yu.A.Litvinov, J.J.Liu, H.Miyatake, J.Y.Moon, A.I.Morales, M.Mukai, S.Nishimura, T.Niwase, M.Rosenbusch, P.Schury, Y.Shi, M.Wada, P.M.Walker Beta decay of the axially asymmetric ground state of 192Re RADIOACTIVITY 192Re(β-) [from Pt(136Xe, X)192Re, E=10.75 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced γ-ray energies and intensities, level scheme, J, π. Comparison with single-particle structure using the nuclear Skyrme-Hartree-Fock model. KEK Isotope Separation System (KISS) in RIKEN Nishina Center.
doi: 10.1016/j.physletb.2021.136088
2021WA39 Phys.Rev. C 104, 024330 (2021) Y.X.Watanabe, P.M.Walker, Y.Hirayama, M.Mukai, H.Watanabe, G.J.Lane, M.Ahmed, M.Brunet, T.Hashimoto, S.Ishizawa, S.Kimura, F.G.Kondev, Yu.A.Litvinov, H.Miyatake, J.Y.Moon, T.Niwase, M.Oyaizu, J.H.Park, Zs.Podolyak, M.Rosenbusch, P.Schury, M.Wada First direct observation of isomeric decay in neutron-rich odd-odd 186Ta RADIOACTIVITY 186Ta(β-), 186mTa(IT)[from W(136Xe, X), E=7.2 MeV/nucleon, followed by laser ionization and mass separation at the KEK Isotope Separation System (KISS) of RIBF-RIKEN facility]; measured Eγ, Iγ, (particle)γ-coin, half-lives of decays of 186Ta and neutral 186mTa from γ-decay curves. 186Ta; deduced levels, J, π, E3 multipolarity of the 161-keV isomeric transition from a comparison of measured half-life of the neutral isomer with previous measurements of the ionized isomeric state of 186Ta using the Experimental Storage Ring at GSI Darmstadt, no evidence found for the β decay mode of the 186Ta isomer.
doi: 10.1103/PhysRevC.104.024330
2020CH33 Phys.Rev. C 102, 034309 (2020) H.Choi, Y.Hirayama, S.Choi, T.Hashimoto, S.C.Jeong, H.Miyatake, J.Y.Moon, M.Mukai, T.Niwase, M.Oyaizu, M.Rosenbusch, P.Schury, A.Taniguchi, Y.X.Watanabe, M.Wada In-gas-cell laser ionization spectroscopy of 194, 196Os isotopes by using a multireflection time-of-flight mass spectrograph NUCLEAR MOMENTS 194,196Os; measured laser resonance spectra, time-of-flight spectra using the in-gas-cell laser ionization method and multireflection time-of-flight mass spectrograph (MRTOF-MS); deduced isotope shifts, change in mean-square charge radii and quadrupole deformation parameters. 194,196Os produced in 198Pt(136Xe, X), E=10.75 MeV/nucleon reaction at the KEK Isotope Separation System (KISS). 188,189,190,192,194,196Os; systematics of the change in mean-square charge radii and quadrupole deformation parameters, and their comparison with theoretical calculations.
doi: 10.1103/PhysRevC.102.034309
2020HI01 Nucl.Instrum.Methods Phys.Res. B463, 425 (2020) Y.Hirayama, Y.X.Watanabe, M.Mukai, P.Schury, M.Ahmed, H.Ishiyama, S.C.Jeong, Y.Kakiguchi, S.Kimura, J.Y.Moon, M.Oyaizu, J.H.Park, M.Wada, H.Miyatake Nuclear spectroscopy of r-process nuclei using KEK Isotope Separation System NUCLEAR REACTIONS 198Pt(136Xe, X)196Os/197Os/198Os/198Pt/199Pt, E=10.75 MeV/nucleon; measured reaction products, Eβ, Iβ, Eγ, Iγ; deduced T1/2 for osmium, HFS spectra for platinum.
doi: 10.1016/j.nimb.2019.04.035
2020MU16 Phys.Rev. C 102, 054307 (2020) M.Mukai, Y.Hirayama, Y.X.Watanabe, S.Schiffmann, J.Ekman, M.Godefroid, P.Schury, Y.Kakiguchi, M.Oyaizu, M.Wada, S.C.Jeong, J.Y.Moon, J.H.Park, H.Ishiyama, S.Kimura, H.Ueno, M.Ahmed, A.Ozawa, H.Watanabe, S.Kanaya, H.Miyatake In-gas-cell laser resonance ionization spectroscopy of 196, 197, 198Ir NUCLEAR MOMENTS 196,197,198Ir; measured hyperfine structure (HFS) spectra using in-gas-cell laser resonance ionization spectroscopy at the KEK Isotope Separation System at RIBF-RIKEN facility; deduced spins for the ground states, magnetic dipole moments, mean-square charge radii, isotope shifts, β2 deformation parameters. Comparison with theoretical calculations based on the strong coupling model. Comparison with previous experimental results. Systematics of quadrupole moments, magnetic dipole moments, mean-square charge radii and β2 deformation parameters for 189,191,193,196,197,198Ir. NUCLEAR REACTIONS 198Pt(136Xe, X)196Ir/197Ir/198Ir, E=10.75 MeV/nucleon; measured extraction yields, Eβ, half-lives of the decays of 196Ir, 197Ir and 198Ir. The Ir isotopes produced in multi-nucleon transfer reaction. Comparison with previous experimental half-lives.
doi: 10.1103/PhysRevC.102.054307
2020WA12 Phys.Rev. C 101, 041305 (2020), Erratum Phys.Rev. C 103, 019902 (2021) Y.X.Watanabe, M.Ahmed, Y.Hirayama, M.Mukai, J.H.Park, P.Schury, Y.Kakiguchi, S.Kimura, A.Ozawa, M.Oyaizu, M.Wada, H.Miyatake Deexcitation γ-ray transitions from the long-lived Iπ = 13/2+ metastable state in 195Os RADIOACTIVITY 195mOs(IT)[from 198Pt(136Xe, X), E=9.4 MeV/nucleon, followed by separation of fragments using KEK Isotope Separation System (KISS) at RIBF-RIKEN facility, and laser excitation of 195Os isomer]; measured Eγ, Iγ, ce, γγ- and (ce)γ-coin, neutral atom T1/2 of the 47-s, (13/2+) isomer from x-ray and γ-ray decay curves using multi-segmented proportional gas counter (MSPGC) for β, x-rays and conversion electrons, and four HPGe clover detectors for γ radiation. 195Os; deduced levels, J, π; discussed multipolarity of the low-energy γ transition from the isomer. Comparison with previous measurement of the 195mOs isomer and half-life of the fully-stripped isomer using the ESR at GSI. Comparison with experimental results for level schemes from the decays of the 13/2+ isomers in 197Pt and 199Hg.
doi: 10.1103/PhysRevC.101.041305
2020WA29 Phys.Rev.Lett. 125, 192505 (2020) P.M.Walker, Y.Hirayama, G.J.Lane, H.Watanabe, G.D.Dracoulis, M.Ahmed, M.Brunet, T.Hashimoto, S.Ishizawa, F.G.Kondev, Y.A.Litvinov, H.Miyatake, J.Y.Moon, M.Mukai, T.Niwase, J.H.Park, Z.Podolyak, M.Rosenbusch, P.Schury, M.Wada, X.Y.Watanabe, W.Y.Liang, F.R.Xu Properties of 187Ta Revealed through Isomeric Decay RADIOACTIVITY 187Ta(IT) [from W(136Xe, X), E=7.2 MeV/nucleon]; measured decay products, Eγ, Iγ, Eβ, Iβ, γ-γ-, β-γ-coin.; deduced level energies, J, π, T1/2. Comparison with theoretical calculations.
doi: 10.1103/PhysRevLett.125.192505
2019MA58 Phys.Rev. C 100, 024602 (2019) M.Mazzocco, N.Keeley, A.Boiano, C.Boiano, M.La Commara, C.Manea, C.Parascandolo, D.Pierroutsakou, C.Signorini, E.Strano, D.Torresi, H.Yamaguchi, D.Kahl, L.Acosta, P.Di Meo, J.P.Fernandez-Garcia, T.Glodariu, J.Grebosz, A.Guglielmetti, Y.Hirayama, N.Imai, H.Ishiyama, N.Iwasa, S.C.Jeong, H.M.Jia, Y.H.Kim, S.Kimura, S.Kubono, G.La Rana, C.J.Lin, P.Lotti, G.Marquinez-Duran, I.Martel, H.Miyatake, M.Mukai, T.Nakao, M.Nicoletto, A.Pakou, K.Rusek, Y.Sakaguchi, A.M.Sanchez-Benitez, T.Sava, O.Sgouros, V.Soukeras, F.Soramel, E.Stiliaris, L.Stroe, T.Teranishi, N.Toniolo, Y.Wakabayashi, Y.X.Watanabe, L.Yang, Y.Y.Yang, H.Q.Zhang Elastic scattering for the 8B and 7Be + 208Pb systems at near-Coulomb barrier energies NUCLEAR REACTIONS 208Pb(8B, 8B), E=50 MeV, [8B secondary beam from 3He(6Li, 8B), E=11.2 MeV/nucleon primary reaction at RIKEN]; 208Pb(7Be, 7Be), E=37.4, 40.5, 42.2 MeV, [7Be secondary beam from 1H(7Li, 7Be), E=48.8 MeV primary reaction at LNL-Legnaro]; measured charged particles, σ(θ, E) using the EXPADES detector array, and angular distribution; analyzed by optical model and the continuum discretized coupled channels (CDCC) formalisms. Experiments performed at the CNS Radioactive Ion Beams (CRIB) facility at RIKEN, and EXOTIC facility at the Laboratori Nazionali di Legnaro (LNL).
doi: 10.1103/PhysRevC.100.024602
2018GA14 Phys.Rev. C 97, 054606 (2018) F.Galtarossa, L.Corradi, S.Szilner, E.Fioretto, G.Pollarolo, T.Mijatovic, D.Montanari, D.Ackermann, D.Bourgin, S.Courtin, G.Fruet, A.Goasduff, J.Grebosz, F.Haas, D.Jelavic Malenica, S.C.Jeong, H.M.Jia, P.R.John, D.Mengoni, M.Milin, G.Montagnoli, F.Scarlassara, N.Skukan, N.Soic, A.M.Stefanini, E.Strano, V.Tokic, C.A.Ur, J.J.Valiente-Dobon, Y.X.Watanabe Mass correlation between light and heavy reaction products in multinucleon transfer 197Au + 130Te collisions NUCLEAR REACTIONS 130Te(197Au, X), E=1.07 GeV; measured reaction products, energy loss, total energy, time of flight, mass distribution of Te isotopes and (Te-like)(Au-like)coin using the PRISMA magnetic spectrometer coupled to NOSE detector for coincidence measurements at LNL-Legnaro Tandem-ALPI facility; deduced total kinetic energy loss (TKEL) for 0n-, 2n-, 4n- and 6n-transfer channels, mass-mass correlation matrix of Te isotopes, and mass distributions from the projection of the corresponding mass-mass matrix for 0n to 6n transfer channels and compared with simulations, σ(total) of Te isotopes and compared with calculations using GRAZING code.
doi: 10.1103/PhysRevC.97.054606
2018HI07 Phys.Rev. C 98, 014321 (2018), Erratum Phys.Rev. C 106, 069902 (2022) Y.Hirayama, Y.X.Watanabe, M.Mukai, M.Ahmed, S.C.Jeong, Y.Kakiguchi, S.Kimura, M.Oyaizu, J.H.Park, P.Schury, M.Wada, H.Watanabe, H.Miyatake β- and γ-decay spectroscopy of 197, 198Os RADIOACTIVITY 196,197,198Os, 198Ir(β-)[from 198Pt(136Xe, X), E=10.75 MeV/nucleon using KEK Isotope Separation System (KISS) at RIKEN, an argon-gas-cell-based laser ion source combined with an on-line isotope separator]; measured β- radiation using multisegmented proportional gas counter (MSPGC), Eγ, Iγ, γγ- and βγ-coin with particle selection condition of Os and Ir, half-lives of decays of 196,197,198Os and 198Ir. 197,198Ir, 198Pt; deduced levels, Iβ feedings, logft, configurations of parent and daughter states. 197mTl(IT); measured Eγ, Iγ, T1/2; deduced conversion coefficients and compared with previous results. Comparison with previous experimental data. A=195-206, Z=76; comparison of measured β-decay half-lives with theoretical results from DF3, FRDM, and KUTY models.
doi: 10.1103/PhysRevC.98.014321
2018IT04 Phys.Rev.Lett. 120, 152501 (2018) Y.Ito, P.Schury, M.Wada, F.Arai, H.Haba, Y.Hirayama, S.Ishizawa, D.Kaji, S.Kimura, H.Koura, M.MacCormick, H.Miyatake, J.Y.Moon, K.Morimoto, K.Morita, M.Mukai, I.Murray, T.Niwase, K.Okada, A.Ozawa, M.Rosenbusch, A.Takamine, T.Tanaka, Y.X.Watanabe, H.Wollnik, S.Yamaki First Direct Mass Measurements of Nuclides around Z=100 with a Multireflection Time-of-Flight Mass Spectrograph NUCLEAR REACTIONS 232Th(19F, 5n)246Es, E=99.6, 103 MeV;238U(18O, 5n)251Fm, E=93.9 MeV; 203Tl(48Ca, 2n)249Md, E=215 MeV; 205Tl(48Ca, 3n)250Md, E=223 MeV; 205Tl(48Ca, 2n)251Md, E=215 MeV; 238U(19F, 5n)252md, E=98.6 MeV; 208Pb(48Ca, 2n)254No, E=219 MeV; measured reaction products, TOF; deduced mass excesses. Comparison with available data. ATOMIC MASSES 253,254Lr, 257,258Db, 261,262Bh, 266Mt; analyzed available data; deduced mass excesses.
doi: 10.1103/PhysRevLett.120.152501
2018KI21 Int.J. Mass Spectrom. 430, 134 (2018) S.Kimura, Y.Ito, D.Kaji, P.Schury, M.Wada, H.Haba, T.Hashimoto, Y.Hirayama, M.MacCormick, H.Miyatake, J.Y.Moon, K.Morimoto, M.Mukai, I.Murray, A.Ozawa, M.Rosenbusch, H.Schatz, A.Takamine, T.Tanaka, Y.X.Watanabe, H.Wollnik Atomic masses of intermediate-mass neutron-deficient nuclei with relative uncertainty down to 35-ppb via multireflection time-of-flight mass spectrograph ATOMIC MASSES 63Cu, 64,65,66Zn, 65Ga, 65,66,67Ge, 67As, 78,81Br, 80Rb, 79Sr; measured frequencies, TOF; deduced masses, new mass excess values. Comparison with AME16 evaluations. NUCLEAR REACTIONS S(36Ar, X)63Cu/64Zn/65Zn/66Zn/65Ga/65Ge/66Ge/67Ge/67As/78Br/81Br/80Rb/79Sr, E=3.30 MeV/nucleon; measured reaction products; deduced σ. Comparison with theoretical calculations of fusion-evaporation reactions.
doi: 10.1016/j.ijms.2018.05.001
2018MU19 Nucl.Instrum.Methods Phys.Res. A884, 1 (2018) M.Mukai, Y.Hirayama, Y.X.Watanabe, P.Schury, H.S.Jung, M.Ahmed, H.Haba, H.Ishiyama, S.C.Jeong, Y.Kakiguchi, S.Kimura, J.Y.Moon, M.Oyaizu, A.Ozawa, J.H.Park, H.Ueno, M.Wada, H.Miyatake High-efficiency and low-background multi-segmented proportional gas counter for β-decay spectroscopy RADIOACTIVITY 198Ir(β-), 199Pt(IT), (β-) [from 198Pt(136Xe, X), E=9.6 MeV/nucleon]; measured decay products, Eγ, Iγ, Eβ, Iβ, β-γ-coin.; deduced T1/2 and uncertainties. Comparison with available data.
doi: 10.1016/j.nima.2017.12.013
2017DA11 Phys.Rev. C 95, 055805 (2017) S.K.Das, T.Fukuda, Y.Mizoi, H.Ishiyama, H.Miyatake, Y.X.Watanabe, Y.Hirayama, S.C.Jeong, H.Ikezoe, M.Matsuda, K.Nishio, T.Hashimoto New measurement of the 8Li(α, n)11B reaction in a lower-energy region below the Coulomb barrier NUCLEAR REACTIONS 4He(8Li, n)11B, E=15.1 MeV, [secondary 8Li beam from 9Be(7Li, X), E=24.0 MeV primary reaction using recoil-mass separator at JAERI tandem accelerator facility]; measured 8Li ion energies using time-of-flight method, 11B particle spectra by an active-target-type gas counter MSTPC, and neutron spectra by segmented plastic-scintillator detector, σ as function of center of mass energy including Gamow window region, and predominant energy region for the big bang nucleosynthesis. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.95.055805
2017HI05 Phys.Rev. C 96, 014307 (2017) Y.Hirayama, M.Mukai, Y.X.Watanabe, M.Ahmed, S.C.Jeong, H.S.Jung, Y.Kakiguchi, S.Kanaya, S.Kimura, J.Y.Moon, T.Nakatsukasa, M.Oyaizu, J.H.Park, P.Schury, A.Taniguchi, M.Wada, K.Washiyama, H.Watanabe, H.Miyatake In-gas-cell laser spectroscopy of the magnetic dipole moment of the N ≈ 126 isotope 199Pt NUCLEAR MOMENTS 199Pt, 199mPt; measured magnetic dipole and electric quadrupole moments, isotope shifts, mean-square charge radii by hyperfine splitting of the 48.792-nm transition using the in-gas-cell laser ionization spectroscopy (IGLIS), and the half-lives of the ground state and the isomer; discussed configurations. 192,196,198Pt; measured mean-square charge radii relative to that of 194Pt by hyperfine structure. Pt isotopes produced in 198Pt(136Xe, X), E=10.75 MeV/nucleon reaction using the on-line KEK Isotope Separation System (KISS) at RIKEN. Comparison with previous experimental results, and with self-consistent Bogoliubov (HFB) model calculations. Systematics of magnetic dipole moments of 5/2- and 13/2+ states in 193,195,197,199Pt and 197,199Hg. Systematics of mean square charge radius and quadrupole deformation in A=178-199 Pt isotopes.
doi: 10.1103/PhysRevC.96.014307
2016HI09 Nuovo Cim. C 39, 359 (2016) Y.Hirayama, Y.X.Watanabe, H.Miyatake, P.Schury, M.Wada, M.Oyaizu, Y.Kakiguchi, M.Mukai, S.Kimura, M.Ahmed, S.C.Jeong, J.Y.Moon, J.H.Park Nuclear spectroscopy of r-process nuclei around N=126 using KISS RADIOACTIVITY 199Pt, 196Ir(β-); measured decay products; deduced T1/2 and their uncertainties. Laser resonance ionization technique in the gas cell.
doi: 10.1393/ncc/i2016-16359-9
2015MO17 Phys.Rev. C 92, 024608 (2015) S.Momota, I.Tanihata, A.Ozawa, M.Notani, K.Yoshida, K.Morimoto, T.Yamaguchi, T.Onishi, A.Yoshida, Y.X.Watanabe, Z.Liu, A.Ono Velocity-dependent transverse momentum distribution of fragments produced from 40Ar+9Be at 95 MeV/nucleon NUCLEAR REACTIONS 9Be(40Ar, X), E=95 MeV/nucleon; measured time-of-flight, energy loss and angular distribution of fragments using Rikagaku Kenkyusho (RIKEN) Projectile Fragment Separator at RIKEN. 10,11,12Be, 11,12,13,14,15B, 13,14,15,16,17,18C, 14,15,16,17,18,19,20,21N, 17,18,19,20,21,22,23,24O, 19,20,21,22,23,24,25,26F, 21,22,23,24,25,26,27,28,29Ne, 24,25,26,27,28,29,30,31Na, 26,27,28,29,30,31,32,33,34Mg, 28,29,30,31,32,33,34,35,36Al, 30,31,32,33,34,35,36,37Si; analyzed transverse momentum distributions for fragments; deduced formulation for the width of transverse momentum distribution. Comparison with antisymmetrized molecular-dynamics model calculations to investigate reaction mechanism.
doi: 10.1103/PhysRevC.92.024608
2015PA24 Eur.Phys.J. A 51, 55 (2015) A.Pakou, D.Pierroutsakou, M.Mazzocco, L.Acosta, X.Aslanoglou, A.Boiano, C.Boiano, D.Carbone, M.Cavallaro, J.Grebosz, N.Keeley, M.La Commara, C.Manea, G.Marquinez-Duran, I.Martel, C.Parascandolo, K.Rusek, A.M.Sanchez-Benitez, O.Sgouros, C.Signorini, F.Soramel, V.Soukeras, E.Stiliaris, E.Strano, D.Torresi, A.Trzcinska, Y.X.Watanabe, H.Yamaguchi Total reaction cross sections for 8Li + 90Zr at near-barrier energies NUCLEAR REACTIONS 90Zr(8Li, 8Li'), E=18.5-21.5 MeV; measured halo nucleus reaction products; deduced quasielastic scattering σ(θ), total reaction σ, ratio direct-to-total σ and systematics of total σ using data from other reactions; calculated quasielastic scattering σ(θ) using optical model with double-folded potentials based on BDM3Y1, ratio direct-to-total σ using CC.
doi: 10.1140/epja/i2015-15055-6
2015PA33 Eur.Phys.J. A 51, 90 (2015) A.Pakou, N.Keeley, D.Pierroutsakou, M.Mazzocco, L.Acosta, X.Aslanoglou, A.Boiano, C.Boiano, D.Carbone, M.Cavallaro, J.Grebosz, M.La Commara, C.Manea, G.Marquinez-Duran, I.Martel, C.Parascandolo, K.Rusek, A.M.Sanchez-Benitez, O.Sgouros, C.Signorini, F.Soramel, V.Soukeras, E.Stiliaris, E.Strano, D.Torresi, A.Trzcinska, Y.X.Watanabe, H.Yamaguchi Important influence of single neutron stripping coupling on near-barrier 8Li + 90Zr quasi-elastic scattering NUCLEAR REACTIONS 90Zr(8Li, 8Li'), E=18.5 MeV; measured Li ions using EXOTIC detector array telescopes; deduced σ(θ); calculated σ(θ) (also for 6,7Li+90Zr), B(E2) using no-coupling and CC with optical potential with double-folded real part and deformation from 6Li+90Zr; deduced strong coupling effect for single neutron stripping.
doi: 10.1140/epja/i2015-15090-3
2015WA30 Phys.Rev.Lett. 115, 172503 (2015) Y.X.Watanabe, Y.H.Kim, S.C.Jeong, Y.Hirayama, N.Imai, H.Ishiyama, H.S.Jung, H.Miyatake, S.Choi, J.S.Song, E.Clement, G.de France, A.Navin, M.Rejmund, C.Schmitt, G.Pollarolo, L.Corradi, E.Fioretto, D.Montanari, M.Niikura, D.Suzuki, H.Nishibata, J.Takatsu Pathway for the Production of Neutron-Rich Isotopes around the N=126 Shell Closure NUCLEAR REACTIONS 198Pt(136Xe, X)138Ba/140Ba/194Os/196Os, E=7.98 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced σ.
doi: 10.1103/PhysRevLett.115.172503
2014IM02 Phys.Rev. C 90, 011302 (2014) N.Imai, M.Mukai, J.Cederkall, H.Aghai, P.Golubev, H.T.Johansson, D.Kahl, J.Kurcewics, T.Teranishi, Y.X.Watanabe Isobaric analog resonances of 31Mg and the border of the island of inversion NUCLEAR REACTIONS 1H, C(30Mg, p), E=2.92 MeV/nucleon, [30Mg secondary beam from U(p, X), E=1.4 GeV primary reaction]; measured particle spectra, differential σ using High-resolution Separator at REX-ISOLDE-CERN facility. Thick polyethylene secondary target. 31Mg; deduced energies of proton resonances, levels, width, partial proton width, spectroscopic factor. R-matrix analysis. Configurations of 31Mg and 30Mg. Boundary of "Island of Inversion". Comparison with shell-model calculations.
doi: 10.1103/PhysRevC.90.011302
2013SO02 Nucl.Instrum.Methods Phys.Res. B295, 1 (2013) T.Sonoda, M.Wada, H.Tomita, C.Sakamoto, T.Takatsuka, T.Furukawa, H.Iimura, Y.Ito, T.Kubo, Y.Matsuo, H.Mita, S.Naimi, S.Nakamura, T.Noto, P.Schury, T.Shinozuka, T.Wakui, H.Miyatake, S.Jeong, H.Ishiyama, Y.X.Watanabe, Y.Hirayama, K.Okada, A.Takamine Development of a resonant laser ionization gas cell for high-energy, short-lived nuclei ATOMIC PHYSICS Fe, Co, Nb, Cu; measured laser wavelength for resonance ionization, transport efficiency. Comparison with calculations.
doi: 10.1016/j.nimb.2012.10.009
2013WA29 Nucl.Instrum.Methods Phys.Res. B317, 752 (2013) Y.X.Watanabe, Y.Hirayama, N.Imai, H.Ishiyama, S.C.Jeong, H.Miyatake, E.Clement, G.de France, A.Navin, M.Rejmund, C.Schmitt, G.Pollarolo, L.Corradi, E.Fioretto, D.Montanari, S.H.Choi, Y.H.Kim, J.S.Song, M.Niikura, D.Suzuki, H.Nishibata, J.Takatsu Study of collisions of 136Xe + 198Pt for the KEK isotope separator NUCLEAR REACTIONS 198Pt(136Xe, X), E=8 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced isotopic distribution of projectile like fragments around the neutron magic number N=126.
doi: 10.1016/j.nimb.2013.04.036
2012HI03 Eur.Phys.J. A 48, 54 (2012) Y.Hirayama, M.Mihara, Y.X.Watanabe, S.C.Jeong, H.Miyatake, S.Momota, T.Hashimoto, N.Imai, K.Matsuta, H.Ishiyama, S.Ichikawa, T.Ishii, T.Izumikawa, I.Katayama, H.Kawakami, H.Kawamura, I.Nishinaka, K.Nishio, H.Makii, S.Mitsuoka, A.Osa, Y.Otokawa, T.K.Sato Tilted-foil technique for producing a spin-polarized radioactive isotope beam
doi: 10.1140/epja/i2012-12054-1
2012ID06 Prog.Theor.Phys.(Kyoto), Suppl. 196, 427 (2012) E.Ideguchi, S.Ota, T.Morikawa, M.Oshima, M.Koizumi, Y.Toh, A.Kimura, H.Harada, K.Furutaka, S.Nakamura, F.Kitatani, Y.Hatsukawa, T.Shizuma, M.Sugawara, Y.X.Watanabe, Y.Hirayama, M.Oi Superdeformed Band in Asymmetric N > Z Nucleus, 40Ar and High-Spin States in A = 30 ∼ 40 Nuclei NUCLEAR REACTIONS 37Cl(α, pγ)40Ar, E not given; 26Mg(18O, 2n2p)40Ar, E=70 MeV; analyzed experimental data; calculated excitation energy and pairing gap, angular momentum, moment of inertia, structure of superdeformed band. HFB calculations, comparison with experimental data.
doi: 10.1143/PTPS.196.427
2012IM01 Phys.Rev. C 85, 034313 (2012) N.Imai, Y.Hirayama, Y.X.Watanabe, T.Teranishi, T.Hashimoto, S.Hayakawa, Y.Ichikawa, H.Ishiyama, S.C.Jeong, D.Kahl, S.Kubono, H.Miyatake, H.Ueno, H.Yamaguchi, K.Yoneda, A.Yoshimi Isobaric analog resonances of the N=21 nucleus 35Si NUCLEAR REACTIONS 1H(34Si, p), [secondary 34Si from fragmentation of 63 MeV/nucleon 40Ar beam], E=5 MeV/nucleon; measured particle spectra, energy loss, cross sections of the proton elastic scattering at E(p)(cm)=2.5-5.5 MeV. 35P; deduced resonances, proton widths, total widths, spectroscopic factors; IAR of 35Si states. R-matrix analysis. 35Si; deduced levels, J, π from IAR assignment. Thick target inverse kinematics (TTIK) experiments at RIKEN facility. Comparison of 35Si levels with those in N=21 nuclei of 33Mg, 37S, 39Ar, 41Ca. Comparison with previous studies.
doi: 10.1103/PhysRevC.85.034313
2011HI15 Eur.Phys.J. A 47, 138 (2011) Y.Hirayama, M.Mihara, Y.X.Watanabe, S.C.Jeong, N.Imai, K.Matsuta, H.Miyatake, T.Hashimoto, H.Ishiyama, S.Ichikawa, T.Ishii, T.Izumikawa, I.Katayama, H.Kawakami, I.Nishinaka, K.Nishio, H.Makii, S.Mitsuoka, S.Momota, A.Osa, Y.Otokawa, T.K.Sato, Y.Wakabayashi Spin-polarization of radioactive 123Ing.s. by the tilted-foil method RADIOACTIVITY 123In(β-)[from U(p, F), E=34 MeV]; measured Iβ(θ, t), β polarization using tilted multifoils at ISOL-based facility TRIAC and β-NMR technique; deduced asymmetry.
doi: 10.1140/epja/i2011-11138-8
2010ID02 Phys.Lett. B 686, 18 (2010) E.Ideguchi, S.Ota, T.Morikawa, M.Oshima, M.Koizumi, Y.Toh, A.Kimura, H.Harada, K.Furutaka, S.Nakamura, F.Kitatani, Y.Hatsukawa, T.Shizuma, M.Sugawara, H.Miyatake, Y.X.Watanabe, Y.Hirayama, M.Oi Superdeformation in asymmetric N > Z nucleus 40Ar NUCLEAR REACTIONS 26Mg(18O, 2n2p), E=69 MeV; measured Eγ, Iγ, γγ-coin, (particle)γ-coin using Gemini-II and Si-Ball detector arrays. 40Ar; deduced levels, J, π, deformation, related features and lifetimes using DSA; calculated configuration using HFB method. Comparison with 36Ar and 40Ca systematics.
doi: 10.1016/j.physletb.2010.02.031
2010IM01 Eur.Phys.J. A 46, 157 (2010) N.Imai, Y.Hirayama, H.Ishiyama, S.C.Jeong, H.Miyatake, Y.X.Watanabe, H.Makii, S.Mitsuoka, D.Nagae, I.Nishinaka, K.Nishio, K.Yamaguchi Proton resonance elastic scattering in inverse kinematics on the medium heavy nucleus 68Zn NUCLEAR REACTIONS 1H(68Zn, p), E=5.5 MeV/nucleon; measured reaction products, proton spectrum. 69Zn; deduced proton yields, σ(θ), isobaric analogue resonance angular momentum, proton and total widths. Comparison with R-matrix calculations.
doi: 10.1140/epja/i2010-11054-5
2009HA11 Phys.Lett. B 674, 276 (2009) T.Hashimoto, H.Ishiyama, Y.X.Watanabe, Y.Hirayama, N.Imai, H.Miyatake, S.C.Jeong, M.-H.Tanaka, N.Yoshikawa, T.Nomura, S.Mitsuoka, K.Nishio, T.K.Sato, A.Osa, S.Ichikawa, M.Matsuda, H.Ikezoe, S.K.Das, Y.Mizoi, T.Fukuda, A.Sato, T.Shimoda, K.Otsuki, T.Kajino A new measurement of the astrophysical 8Li(d, t)7Li reaction NUCLEAR REACTIONS 2H(8Li, t), E=0.18, 0.24, 0.30, 0.40, 0.46, 0.60, 0.75 MeV/nucleon; measured charged-particle spectra, σ, σ(θ), σ(E); deduced 7Li excitation energy spectra, astrophysical reaction rate. Comparison with other data.
doi: 10.1016/j.physletb.2009.03.031
2009NA07 Phys.Rev. C 79, 035805 (2009) T.Nakamura, N.Fukuda, N.Aoi, N.Imai, M.Ishihara, H.Iwasaki, T.Kobayashi, T.Kubo, A.Mengoni, T.Motobayashi, M.Notani, H.Otsu, H.Sakurai, S.Shimoura, T.Teranishi, Y.X.Watanabe, K.Yoneda Neutron capture cross section of 14C of astrophysical interest studied by Coulomb breakup of 15C NUCLEAR REACTIONS 15C(Pb, X)14C, E=68 MeV/nucleon; measured breakup σ as a function of energy; deduced B(E1) as a function of excitation. 14C(n, γ), E=0-2.8 MeV; deduced σ using principle of detailed balance and direct radiative capture model. Coulomb breakup process. Comparison with experimental data.
doi: 10.1103/PhysRevC.79.035805
2007NO13 Phys.Rev. C 76, 044605 (2007) M.Notani, H.Sakurai, N.Aoi, H.Iwasaki, N.Fukuda, Z.Liu, K.Yoneda, H.Ogawa, T.Teranishi, T.Nakamura, H.Okuno, A.Yoshida, Y.X.Watanabe, S.Momota, N.Inabe, T.Kubo, S.Ito, A.Ozawa, T.Suzuki, I.Tanihata, M.Ishihara Projectile fragmentation reactions and production of nuclei near the neutron drip line NUCLEAR REACTIONS 9Be(40Ar, X)6Li/7Li/8Li/9Li/7Be/8Be/9Be/10Be/11Be/12Be/10B/11B/12B/13B/14B/15B/11C/12C/13C/14C/15C/16C/17C/18C/13N/14N/15N/16N/17N/18N/19N/20N/21N/15O/16O/17O/18O/19O/20O/21O/22O/23O/24O/17F/18F/19F/20F/21F/22F/23F/24F/25F/26F/27F/19Ne/20Ne/21Ne/22Ne/23Ne/24Ne/25Ne/26Ne/27Ne/28Ne/29Ne/21Na/22Na/23Na/24Na/25Na/26Na/27Na/28Na/29Na/30Na/31Na/32Na/23Mg/24Mg/25Mg/26Mg/27Mg/28Mg/29Mg/30Mg/31Mg/32Mg/33Mg/34Mg/25Al/26Al/27Al/28Al/29Al/30Al/31Al/32Al/33Al/34Al/35Al/36Al/27Si/28Si/29Si/30Si/31Si/32Si/33Si/34Si/35Si/36Si/37Si/38Si/29P/30P/31P/32P/33P/34P/35P/36P/37P/38P/39P/33S/34S/35S/36S/37S/38S/36Cl/37Cl/38Cl/39Cl/39Ar, E=100 MeV/nucleon; 181Ta(40Ar, X)6Li/7Li/8Li/9Be/10Be/11Be/10B/11B/12B/13B/14B/11C/12C/13C/14C/15C/16C/17C/13N/14N/15N/16N/17N/18N/19N/15O/16O/17O/18O/19O/20O/21O/17F/18F/19F/20F/21F/22F/23F/24F/19Ne/20Ne/21Ne/22Ne/23Ne/24Ne/25Ne/26Ne/27Ne/21Na/22Na/23Na/24Na/25Na/26Na/27Na/28Na/29Na/23Mg/24Mg/25Mg/26Mg/27Mg/28Mg/29Mg/30Mg/31Mg/24/25Al/26Al/27Al/28Al/29Al/30Al/31Al/32Al/33Al/34Al/26Si/27Si/28Si/29Si/30Si/31Si/32Si/33Si/34Si/29P/30P/31P/32P/33P/34P/35P/36P/30S/31S/32S/33S/34S/35S/36S/37S/33Cl/34Cl/35Cl/36Cl/37Cl/35Ar/36Ar/37Ar/38Ar/39Ar/37K/38K/39K/40K, E=100 MeV/nucleon; measured momentum distribution, production cross sections. RIKEN.
doi: 10.1103/PhysRevC.76.044605
2007SU20 Phys.Lett. B 654, 160 (2007) T.Sugimoto, T.Nakamura, Y.Kondo, N.Aoi, H.Baba, D.Bazin, N.Fukuda, T.Gomi, H.Hasegawa, N.Imai, M.Ishihara, T.Kobayashi, T.Kubo, M.Miura, T.Motobayashi, H.Otsu, A.Saito, H.Sakurai, S.Shimoura, A.M.Vinodkumar, K.Watanabe, Y.X.Watanabe, T.Yakushiji, Y.Yanagisawa, K.Yoneda The first 2+ state of 14Be NUCLEAR REACTIONS 12C(14Be, 2n12Be), E=68.1 MeV/nucleon; measured relative energy spectra, Eγ, Iγ, (residual)γ-coin. 14Be deduced energy level, J, π, deformation length, configurations. Comparison with other data and shell model.
doi: 10.1016/j.physletb.2007.08.052
2006IS02 Nucl.Instrum.Methods Phys.Res. A560, 366 (2006) H.Ishiyama, T.Ishikawa, T.Hashimoto, Y.X.Watanabe, Y.Hirayama, N.Imai, H.Miyatake, M.H.Tanaka, Y.Fuchi, N.Yoshikawa, S.C.Jeong, H.Kawakami, I.Katayama, T.Nomura, S.Mitsuoka, K.Nishio, M.Matsuda, P.K.Saha, H.Ikezoe, S.K.Das, Y.Mizoi, T.Fukuda Production of a low-energy radioactive nuclear beam with high purity using JAERI-RMS NUCLEAR REACTIONS 9Be(7Li, 8Li), E=24 MeV; 2H(11B, 12B), E=40 MeV; 2H(18O, 16N), E=73 MeV; measured particle spectra, yields. Radioactive beam production.
doi: 10.1016/j.nima.2005.12.244
2006IS04 Phys.Lett. B 640, 82 (2006) H.Ishiyama, T.Hashimoto, T.Ishikawa, Y.X.Watanabe, S.K.Das, H.Miyatake, Y.Mizoi, T.Fukuda, M.-H.Tanaka, Y.Fuchi, N.Yoshikawa, Y.Hirayama, S.C.Jeong, T.Nomura, I.Katayama, S.Mitsuoka, K.Nishio, M.Matsuda, P.K.Saha, S.Ichikawa, H.Ikezoe, T.Furukawa, H.Izumi, T.Shimoda, K.Nakai A new measurement of the astrophysical 8Li(α, n)11B reaction NUCLEAR REACTIONS 4He(8Li, n), E(cm)=0.7-2.6 MeV; measured σ(E), particle spectra. Comparison with other results.
doi: 10.1016/j.physletb.2006.07.036
2006NA21 Phys.Rev.Lett. 96, 252502 (2006) T.Nakamura, A.M.Vinodkumar, T.Sugimoto, N.Aoi, H.Baba, D.Bazin, N.Fukuda, T.Gomi, H.Hasegawa, N.Imai, M.Ishihara, T.Kobayashi, Y.Kondo, T.kubo, M.Miura, T.Motobayashi, H.Otsu, A.Saito, H.Sakurai, S.Shimoura, K.Watanabe, Y.X.Watanabe, T.Yakushiji, Y.Yanagisawa, K.Yoneda Observation of Strong Low-Lying E1 Strength in the Two-Neutron Halo Nucleus 11Li NUCLEAR REACTIONS Pb(11Li, 2n9Li), E=70 MeV/nucleon; measured relative energy spectra. 11Li deduced B(E1) distribution.
doi: 10.1103/PhysRevLett.96.252502
2005IW02 Phys.Lett. B 620, 118 (2005) H.Iwasaki, T.Motobayashi, H.Sakurai, K.Yoneda, T.Gomi, N.Aoi, N.Fukuda, Zs.Fulop, U.Futakami, Z.Gacsi, Y.Higurashi, N.Imai, N.Iwasa, T.Kubo, M.Kunibu, M.Kurokawa, Z.Liu, T.Minemura, A.Saito, M.Serata, S.Shimoura, S.Takeuchi, Y.X.Watanabe, K.Yamada, Y.Yanagisawa, M.Ishihara Quadrupole collectivity of 28Ne and the boundary of the island of inversion NUCLEAR REACTIONS C, Pb(28Ne, 28Ne'), E=46 MeV/nucleon; measured Eγ, Iγ, (particle)γ-coin. 28Ne deduced transition B(E2), suppressed collectivity. Comparison with neighboring nuclides, model predictions.
doi: 10.1016/j.physletb.2005.06.032
2005KO13 Phys.Rev. C 71, 044611 (2005) Y.Kondo, T.Nakamura, N.Aoi, H.Baba, D.Bazin, N.Fukuda, T.Gomi, H.Hasegawa, N.Imai, M.Ishihara, T.Kobayashi, T.Kubo, M.Miura, T.Motobayashi, A.Saito, H.Sakurai, S.Shimoura, T.Sugimoto, K.Watanabe, Y.X.Watanabe, T.Yakushiji, Y.Yanagisawa, K.Yoneda In-beam γ-ray spectroscopy of neutron-rich boron isotopes 15, 17B via inelastic scattering on 12C NUCLEAR REACTIONS 12C(17B, 17B'), (17B, 15BX), (15B, 15B'), (17B, 14BX), (17B, 12BX), (15B, 14BX), (15B, 12BX), E ≈ 70 MeV/nucleon; measured Eγ, Iγ, (particle)γ-coin. 12C(17B, 17B'), (15B, 15B'), E ≈ 70 MeV; measured σ(E, θ). 15,17B deduced levels, transitions, quadrupole deformation lengths. 12,14B deduced transitions.
doi: 10.1103/PhysRevC.71.044611
2005KU27 Nucl.Phys. A758, 733c (2005) S.Kubono, T.Teranishi, M.Notani, H.Yamaguchi, A.Saito, J.J.He, M.Wakabayashi, H.Fujikawa, G.Amadio, H.Baba, T.Fukuchi, S.Shimoura, S.Michimasa, S.Nishimura, M.Nishimura, Y.Gono, A.Odahara, S.Kato, J.Y.Moon, J.H.Lee, C.S.Lee, J.C.Kim, K.I.Hahn, T.Ishikawa, T.Hashimoto, H.Ishiyama, Y.X.Watanabe, M.H.Tanaka, H.Miyatake, Zs.Fulop, V.Guimaraes, R.Lichtenthaler Study of Stellar Reactions in Explosive Hydrogen Burning with CRIB NUCLEAR REACTIONS 4He(14O, p), E(cm) ≈ 1-3.6 MeV; measured proton spectrum. 1H(23Mg, p), E(cm) ≈ 0.6-3.5 MeV; measured elastic σ(θ). 24Al deduced excited states energies.
doi: 10.1016/j.nuclphysa.2005.05.132
2004FU29 Phys.Rev. C 70, 054606 (2004) N.Fukuda, T.Nakamura, N.Aoi, N.Imai, M.Ishihara, T.Kobayashi, H.Iwasaki, T.Kubo, A.Mengoni, M.Notani, H.Otsu, H.Sakurai, S.Shimoura, T.Teranishi, Y.X.Watanabe, K.Yoneda Coulomb and nuclear breakup of a halo nucleus 11Be NUCLEAR REACTIONS C, Pb(11Be, n10Be), E ≈ 68 MeV/nucleon; measured σ, σ(θ), fragments relative energy spectra; deduced Coulomb and nuclear contributions. 11Be deduced levels, J, π, deformation lengths, spectroscopic factor.
doi: 10.1103/PhysRevC.70.054606
2004HA54 Nucl.Phys. A746, 330c (2004) T.Hashimoto, T.Ishikawa, T.Kawamura, K.Nakai, H.Ishiyama, Y.X.Watanabe, H.Miyatake, M.H.Tanaka, N.Yoshikawa, S.C.Jeong, Y.Fuchi, I.Katayama, T.Nomura, S.K.Das, P.K.Saha, T.Fukuda, K.Nishio, S.Mitsuoka, H.Ikezoe, M.Matsuda, S.Ichikawa, T.Furukawa, H.Izumi, T.Shimoda, Y.Mizoi, M.Terasawa Measurement of the 8Li(α, n)11B reaction cross sections of astrophysical interest NUCLEAR REACTIONS 4He(8Li, n), E=14.6 MeV; measured excitation energy spectra. 8Li(α, n), E(cm)=0.5-3 MeV; deduced excitation function. Astrophysical implications discussed.
doi: 10.1016/j.nuclphysa.2004.09.040
2004MI34 Nucl.Phys. A738, 401 (2004) H.Miyatake, H.Ishiyama, M.-H.Tanaka, Y.X.Watanabe, N.Yoshikawa, S.C.Jeong, Y.Matsuyama, Y.Fuchi, T.Nomura, T.Hashimoto, T.Ishikawa, K.Nakai, S.K.Das, P.K.Saha, T.Fukuda, K.Nishio, S.Mitsuoka, H.Ikezoe, S.Ichikawa, M.Matsuda, Y.Mizoi, T.Furukawa, H.Izumi, T.Shimoda, M.Terasawa Exclusive measurement of the astrophysical 8Li(α, n) reaction cross section NUCLEAR REACTIONS 4He(8Li, n), E(cm)=0.9-2.8 MeV; measured σ, excitation energy spectrum. Comparison with previous results.
doi: 10.1016/j.nuclphysa.2004.04.070
2004MO48 Nucl.Phys. A746, 407c (2004) S.Momota, I.Tanihata, A.Ozawa, M.Notani, K.Yoshida, K.Morimoto, T.Onishi, T.Yamaguchi, A.Yoshida, Y.X.Watanabe, L.Zhong, M.Kanazawa, A.Kitagawa, M.Suda, Y.Nojiri Momentum distributions and production cross sections of projectile-like fragments NUCLEAR REACTIONS 9Be(40Ar, X), E=95 MeV/nucleon; 12C, 27Al, 197Au(12C, X), (40Ar, X), E=290 MeV/nucleon; measured projectile-like fragments production σ, momentum distributions.
doi: 10.1016/j.nuclphysa.2004.09.084
2003NA37 Nucl.Phys. A722, 301c (2003) T.Nakamura, N.Fukuda, N.Aoi, H.Iwasaki, T.Kobayashi, T.Kubo, A.Mengoni, M.Notani, H.Otsu, H.Sakurai, S.Shimoura, T.Teranishi, Y.X.Watanabe, K.Yoneda, M.Ishihara Coulomb dissociation of halo nuclei NUCLEAR REACTIONS 208Pb(11Be, n10Be), (15C, 14CX), (19C, 18CX), E=68 MeV/nucleon; measured relative energy spectra. 12C(11Be, n10Be), E=68 MeV/nucleon; measured relative energy spectra, σ(θ).
doi: 10.1016/S0375-9474(03)01381-2
2003OG03 Phys.Rev. C 67, 064308 (2003) H.Ogawa, K.Asahi, K.Sakai, T.Suzuki, H.Izumi, H.Miyoshi, M.Nagakura, K.Yogo, A.Goto, T.Suga, T.Honda, H.Ueno, Y.X.Watanabe, K.Yoneda, A.Yoshimi, N.Fukuda, Y.Kobayashi, A.Yoshida, T.Kubo, M.Ishihara, N.Imai, N.Aoi, W.-D.Schmidt-Ott, G.Neyens, S.Teughels Electric quadrupole moment of 17B and anomalous E2 effective charges for neutron-rich nuclei RADIOACTIVITY 17B(β-) [from 93Nb(22Ne, X)]; measured β-NMR spectra from polarized source. 17B deduced quadrupole moment. Comparison with shell-model predictions.
doi: 10.1103/PhysRevC.67.064308
2002AS06 Nucl.Phys. A704, 88c (2002) K.Asahi, K.Sakai, H.Ogawa, H.Miyoshi, K.Yogo, A.Goto, T.Suga, H.Ueno, Y.Kobayashi, A.Yoshimi, A.Yoshida, T.Kubo, Y.X.Watanabe, H.Imai, K.Yoneda, N.Fukuda, N.Aoi, M.Ishihara, W.-D.Schmidt-Ott, G.Neyens, S.Teughels Electromagnetic Moments of Neutron-Rich Nuclei Measured with Polarized Radioactive Ion Beams NUCLEAR MOMENTS 15C, 17,18N; measured β-NMR spectra of oriented nuclei; deduced μ.
doi: 10.1016/S0375-9474(02)00769-8
2002FU20 Prog.Theor.Phys.(Kyoto), Suppl. 146, 462 (2002) N.Fukuda, T.Nakamura, T.Kobayashi, H.Otsu, N.Aoi, N.Imai, H.Iwasaki, T.Kubo, A.Mengoni, M.Notani, H.Sakurai, S.Shimoura, T.Teranishi, Y.X.Watanabe, K.Yoneda, M.Ishihara Coulomb Dissociation of Halo Nuclei NUCLEAR REACTIONS C, Pb(11Be, n10Be), (15C, n14C), E=68 MeV/nucleon; measured dissociation σ, relative energy spectra. 14C(n, γ), E(cm)=0-1 MeV; deduced σ.
doi: 10.1143/PTPS.146.462
2002OG02 Eur.Phys.J. A 13, 81 (2002) H.Ogawa, K.Asahi, H.Ueno, K.Sakai, H.Miyoshi, D.Kameda, T.Suzuki, H.Izumi, N.Imai, Y.X.Watanabe, K.Yoneda, N.Fukuda, H.Watanabe, A.Yoshimi, W.Sato, N.Aoi, M.Nagakura, T.Suga, K.Yogo, A.Goto, T.Honda, Y.Kobayashi, W.-D.Schmidt-Ott, G.Neyens, S.Teughels, A.Yoshida, T.Kubo, M.Ishihara Quenching of Neutron E2 Effective Charge in Neutron-Rich Nuclei and the Ground-State Spin-Parity of 17C RADIOACTIVITY 17B, 17C(β-) [from 93Nb(22Ne, X)]; measured β-NMR spectra from polarized nuclei. 17B deduced quadrupole moment. 17C deduced g-factor, ground-state J, π. Quenching of core polarization discussed.
doi: 10.1007/s10050-002-8723-3
2002YO04 Nucl.Phys. A701, 437c (2002) K.Yoneda, H.Sakurai, T.Gomi, T.Motobayashi, N.Aoi, N.Fukuda, U.Futakami, Z.Gacsi, Y.Higurashi, N.Imai, N.Iwasa, H.Iwasaki, T.Kubo, M.Kunibu, M.Kurokawa, Z.Liu, T.Minemura, A.Saito, M.Serata, S.Shimoura, S.Takeuchi, Y.X.Watanabe, K.Yamada, Y.Yanagisawa, K.Yogo, A.Yoshida, M.Ishihara Gamma-Ray Spectroscopy of 34Mg via RI Beam Fragmentation NUCLEAR REACTIONS 9Be(36Si, X)34Mg, E=40 MeV/nucleon; measured Eγ, Iγ, (fragment)γ-coin. 34Mg deduced transitions. Secondary beam from 40Ar fragmentation.
doi: 10.1016/S0375-9474(01)01624-4
2001AS07 Hyperfine Interactions 136/137, 183 (2001) K.Asahi, H.Ogawa, H.Ueno, Y.Kobayashi, W.Sato, A.Yoshimi, H.Watanabe, D.Kameda, H.Miyoshi, K.Sakai, N.Imai, K.Yoneda, Y.X.Watanabe, N.Fukuda, N.Aoi, A.Yoshida, T.Kubo, M.Ishihara Nuclear Moment Studies with Polarized Radioactive Nuclear Beams RADIOACTIVITY 17C(β-) [from 93Nb(22Ne, X)]; measured β-NMR spectrum from oriented source. 17C deduced ground-state g factor.
doi: 10.1023/A:1020536116462
2001IW07 Phys.Lett. 522B, 227 (2001) H.Iwasaki, T.Motobayashi, H.Sakurai, K.Yoneda, T.Gomi, N.Aoi, N.Fukuda, Zs.Fulop, U.Futakami, Z.Gacsi, Y.Higurashi, N.Imai, N.Iwasa, T.Kubo, M.Kunibu, M.Kurokawa, Z.Liu, T.Minemura, A.Saito, M.Serata, S.Shimoura, S.Takeuchi, Y.X.Watanabe, K.Yamada, Y.Yanagisawa, M.Ishihara Large Collectivity of 34Mg NUCLEAR REACTIONS Pb(34Mg, 34Mg'), E=44.9 MeV/nucleon; measured Eγ, Iγ, (particle)γ-coin following projectile Coulomb excitation. 34Mg deduced transitions B(E2), quadrupole deformation parameter. Comparison with model predictions. Secondary beam from 40Ar fragmentation.
doi: 10.1016/S0370-2693(01)01244-8
2001WA25 Eur.Phys.J. A 10, 373 (2001) Y.X.Watanabe, A.Yoshida, T.Fukuda, T.Sekine, Y.Watanabe, H.Ikezoe, Y.Nagame, T.Ikuta, I.Nishinaka, Y.Mizoi, J.Nakano, M.Hirai, H.Sakurai, H.Kobinata, Y.Pu, K.Kimura, M.Ishihara Measurement of Fusion Excitation Functions of 27, 29, 31Al + 197Au NUCLEAR REACTIONS 197Au(27Al, X), (29Al, X), (31Al, X), E(cm) ≈ 100-170 MeV; measured fusion σ; deduced neutron transfer contribution. Coupled-channels calculations.
doi: 10.1007/s100500170102
2001YO03 Phys.Lett. 499B, 233 (2001) K.Yoneda, H.Sakurai, T.Gomi, T.Motobayashi, N.Aoi, N.Fukuda, U.Futakami, Z.Gacsi, Y.Higurashi, N.Imai, N.Iwasa, H.Iwasaki, T.Kubo, M.Kunibu, M.Kurokawa, Z.Liu, T.Minemura, A.Saito, M.Serata, S.Shimoura, S.Takeuchi, Y.X.Watanabe, K.Yamada, Y.Yanagisawa, K.Yogo, A.Yoshida, M.Ishihara Deformation of 34Mg Studied via In-Beam γ-Ray Spectroscopy using Radioactive-Ion Projectile Fragmentation NUCLEAR REACTIONS 9Be(36Si, X)32Mg/33Mg/34Mg, E=38 MeV/nucleon; measured Eγ, Iγ, (particle)γ-coin. 34Mg deduced levels, J, π, deformation. Two-step fragmentation.
doi: 10.1016/S0370-2693(01)00025-9
2000MI34 Phys.Rev. C62, 065801 (2000); Addendum Phys.Rev. C 91, 047602 (2015) Y.Mizoi, T.Fukuda, Y.Matsuyama, T.Miyachi, H.Miyatake, N.Aoi, N.Fukuda, M.Notani, Y.X.Watanabe, K.Yoneda, M.Ishihara, H.Sakurai, Y.Watanabe, A.Yoshida Measurement of the 8Li(α, n)11B Reaction and Astrophysical Implications NUCLEAR REACTIONS 4He(8Li, n), (9Be, n), E(cm)=1.5-7.0 MeV; measured neutron spectra, total σ, σ(E). 8Li(α, n), E(cm)=1.5-7.0 MeV; deduced σ, reaction rates, astrophysical S-factors. Secondary beams from 12C fragmentation. Comparisons with previous results, model predictions.
doi: 10.1103/PhysRevC.62.065801
1999NA27 Phys.Rev.Lett. 83, 1112 (1999) T.Nakamura, N.Fukuda, T.Kobayashi, N.Aoi, H.Iwasaki, T.Kubo, A.Mengoni, M.Notani, H.Otsu, H.Sakurai, S.Shimoura, T.Teranishi, Y.X.Watanabe, K.Yoneda, M.Ishihara Coulomb Dissociation of 19C and Its Halo Structure NUCLEAR REACTIONS C, Pb(19C, n18C), E ≈ 67 MeV/nucleon; measured (carbon)(neutron)-coin, dissociation σ vs relative energy, σ(θ). 19C deduced ground-state J, π, neutron separation energy.
doi: 10.1103/PhysRevLett.83.1112
1999SA06 Phys.Lett. 448B, 180 (1999) H.Sakurai, S.M.Lukyanov, M.Notani, N.Aoi, D.Beaumel, N.Fukuda, M.Hirai, E.Ideguchi, N.Imai, M.Ishihara, H.Iwasaki, T.Kubo, K.Kusaka, H.Kumagai, T.Nakamura, H.Ogawa, Yu.E.Penionzhkevich, T.Teranishi, Y.X.Watanabe, K.Yoneda, A.Yoshida Evidence for Particle Stability of 31F and Particle Instability of 25N and 28O NUCLEAR REACTIONS Ta(40Ar, X), E=94.1 MeV/nucleon; measured fragments isotopic yields; deduced evidence for 31F; deduced no evidence for 24,25N, 27,28O, 30F. Comparison with model predictions.
doi: 10.1016/S0370-2693(99)00015-5
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