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NSR database version of April 11, 2024.

Search: Author = Y.X.Watanabe

Found 67 matches.

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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
Citations: PlumX Metrics


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
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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
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE1991.


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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE1932.


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
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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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE1933.


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
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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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2017.


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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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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Note: The following list of authors and aliases matches the search parameter Y.X.Watanabe: X.Y.WATANABE, Y.X.WATANABE