NSR Query Results
Output year order : Descending NSR database version of March 21, 2024. Search: Author = A.Toyoshima Found 21 matches. 2020HA27 Phys.Rev. C 102, 024625 (2020) H.Haba, F.Fan, D.Kaji, Y.Kasamatsu, H.Kikunaga, Y.Komori, N.Kondo, H.Kudo, K.Morimoto, K.Morita, M.Murakami, K.Nishio, J.P.Omtvedt, K.Ooe, Z.Qin, D.Sato, N.Sato, T.K.Sato, Y.Shigekawa, A.Shinohara, M.Takeyama, T.Tanaka, A.Toyoshima, K.Tsukada, Y.Wakabayashi, Y.Wang, S.Wulff, S.Yamaki, S.Yano, Y.Yasuda, T.Yokokita Production of 266Bh in the 248Cm(23Na, 5n)266Bh reaction and its decay properties RADIOACTIVITY 266,267Bh(α)[from 248Cm(23Na, 5n), (23Na, 4n), E=125.9, 130.6, 135.3 MeV]; 262Db(α), (SF)[from 266Bh α decay]; 263Db(EC), (α), (SF)[from 267Bh α decay]; 263Rf(SF)[from 263Db EC decay]; 258Lr(α), (EC)[from 262Db α decay]; 259Lr(α), (SF)[from 263Db α decay]; 258No(SF)[from 258Lr(EC); measured Eα, αα-, ααα- and α(SF)-correlations for 32 observed events using rotating wheel apparatus MANON and gas-jet transport system coupled to gas-filled recoil ion separator GARIS at RIKEN; deduced decay times, half-lives, decay branching ratios, production cross sections for 266Bh and 267Bh. Comparison with previous experimental results for half-lives and branching ratios for decay modes. NUCLEAR REACTIONS 248Cm(23Na, 5n), (23Na, 4n), E=125.9, 130.6, 135.3 MeV; measured reaction products, σ(E) at RIKEN. Comparison with HIVAP calculations, and with previous experimental results.
doi: 10.1103/PhysRevC.102.024625
2019XI06 Phys.Rev. C 100, 034315 (2019) Y.Xiao, S.Go, R.Grzywacz, R.Orlandi, A.N.Andreyev, M.Asai, M.A.Bentley, G.de Angelis, C.J.Gross, P.Hausladen, K.Hirose, S.Hofmann, H.Ikezoe, D.G.Jenkins, B.Kindler, R.Leguillon, B.Lommel, H.Makii, C.Mazzocchi, K.Nishio, P.Parkhurst, S.V.Paulauskas, C.M.Petrache, K.P.Rykaczewski, T.K.Sato, J.Smallcombe, A.Toyoshima, K.Tsukada, K.Vaigneur, R.Wadsworth Search for α decay of 104Te with a novel recoil-decay scintillation detector RADIOACTIVITY 108,109Xe, 104,105Te(α)[from 54Fe(58Ni, X), E=250 MeV from the tandem accelerator of the Japan Atomic Energy Agency (JAEA), followed by separation of evaporation residues using Recoil Mass Separator (RMS)]; measured Eα, Iα, αα-correlations using an inorganic scintillator YAP:Ce for implanted nuclei, and a multiwire proportional chamber (MWPC) for α particles; deduced αα-correlations for the 109Xe to 105Te to 101Sn α-decay chain, and no conclusive trace observed for the 108Xe to 104Te to 100Sn α-decay chain, half-life of 108Xe decay, upper limit of 4 ns for the half-life of 104Te; estimated cross section for the production of 108Xe, an order of magnitude lower than the expectation based on earlier cross section measurements and the HIVAP fusion-evaporation code. 109I(p), 108,109Te(α); measured proton and α spectra, half-life of 109I decay. Comparison with data for 108Xe to 104Te to 100Sn α-decay chain reported by 2018Au04.
doi: 10.1103/PhysRevC.100.034315
2015NI08 J.Radioanal.Nucl.Chem. 304, 1077 (2015) I.Nishinaka, A.Yokoyama, K.Washiyama, E.Maeda, S.Watanabe, K.Hashimoto, N.S.Ishioka, H.Makii, A.Toyoshima, N.Yamada, R.Amano Production and separation of astatine isotopes in the 7Li + natPb reaction NUCLEAR REACTIONS Pb(7Li, X)207At/208At/209At/210At/211At, E=29-57 MeV; measured reaction products, Eα, Iα, Eγ, Iγ; deduced production σ. Comparison with the predictions of the statistical calculation using the modified HIVAP code.
doi: 10.1007/s10967-015-3975-y
2014HA04 Phys.Rev. C 89, 024618 (2014) H.Haba, M.Huang, D.Kaji, J.Kanaya, Y.Kudou, K.Morimoto, K.Morita, M.Murakami, K.Ozeki, R.Sakai, T.Sumita, Y.Wakabayashi, A.Yoneda, Y.Kasamatsu, Y.Kikutani, Y.Komori, K.Nakamura, A.Shinohara, H.Kikunaga, H.Kudo, K.Nishio, A.Toyoshima, K.Tsukada Production of 262Db in the 248Cm(19F, 5n)262Db reaction and decay properties of 262Db and 258Lr NUCLEAR REACTIONS 248Cm(19F, 5n)262Db, E=97.4, 103.1 MeV; measured production σ of 262Db, correlated α-α and α-SF decay chains using rotating wheel apparatus MANON for α and SF spectrometry at RIKEN facility. Comparison with HIVAP model calculations, and with previous experimental and theoretical results. No observation of 263Db and 259Lr correlated chains through possible 248Cm(19F, 4n) reaction channel. RADIOACTIVITY 262Db(α), (SF)[from 248Cm(19F, 5n), E=97.4, 103.1 MeV]; 258Lr(α), (EC)[from 262Db α decay]; measured Eα, Iα, half-lives, α-α, α-SF correlations, branching ratios for α, SF and EC modes. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.89.024618
2014SA21 Radiochim.Acta 102, 211 (2014) N.Sato, T.K.Sato, M.Asai, A.Toyoshima, K.Tsukada, Z.J.Li, K.Nishio, Y.Nagame, M.Schadel, H.Haba, S.Ichikawa, H.Kikunaga Production of 256Lr in the 249, 250, 251Cf + 11B, 243Am + 18O, and 248Cm + 14N reactions NUCLEAR REACTIONS 249,250,251Cf(11B, xn)256Lr, E=65.1-76.4 MeV; 243Am(18O, 5n), E=106.9-112.4 MeV; 248Cm(14N, 6n), E=101.5 MeV; measured reaction products, Eα, Iα; deduced σ, T1/2. Comparison with available data.
doi: 10.1515/ract-2014-2142
2013AS02 Phys.Rev. C 87, 014332 (2013) M.Asai, K.Tsukada, M.Sakama, H.Haba, T.Ichikawa, Y.Ishii, A.Toyoshima, T.Ishii, I.Nishinaka, Y.Nagame, Y.Kasamatsu, M.Shibata, Y.Kojima, H.Hayashi Ground-state configuration of the N=157 nucleus 259No RADIOACTIVITY 259No(α)[from 248Cm(18O, 3nα), E=94 MeV]; measured Eα, Iα, Eγ, I(K-x rays), αγ-coin, T1/2 at JAEA facility. 255Fm; deduced levels, J, π, multipolarity, configuration. 259No; deduced ground-state configuration. 255,257,259,261,263,265No; calculated energies of neutron single-particle orbitals, and β2, β4, β6 deformation parameters using macroscopic-microscopic model based on FRLDM and Strutinsky shell correction method. Observed α lines from decays of 211,213,214Po, 211At, 250,254,255,256Fm, 253Es, 257No, 261Rf formed in competing reaction channels.
doi: 10.1103/PhysRevC.87.014332
2011AS03 Phys.Rev. C 83, 014315 (2011) M.Asai, K.Tsukada, H.Haba, Y.Ishii, T.Ichikawa, A.Toyoshima, T.Ishii, Y.Nagame, I.Nishinaka, Y.Kojima, K.Sueki Neutron one-quasiparticle states in 251Fm151 populated via the α decay of 255No RADIOACTIVITY 255No(α)[from 248Cm(12C, 5n), E=77 MeV; measured Eα, Iα, Eγ, Iγ, αγ-coin, T1/2, level half-lives from delayed spectra. 251Fm; deduced levels, J, π, α hindrance factors, conversion coefficients, multipolarities, B(E2), configurations. Comparison of α hindrance factors with those from α decay of 251Cf and 253Fm. NUCLEAR STRUCTURE 245Pu, 247Cm, 249Cf, 251Fm, 253No, 255Rf; calculated one quasiparticle neutron states in N=151 nuclei using macroscopic-microscopic approach with finite-range liquid drop model involving β2, β4, β6 and β8 deformation parameters.
doi: 10.1103/PhysRevC.83.014315
2010TA10 Phys.Rev. C 81, 057303 (2010) R.Takahashi, T.Ishii, M.Asai, D.Nagae, H.Makii, K.Tsukada, A.Toyoshima, Y.Ishii, M.Matsuda, A.Makishima, T.Shizuma, T.Kohno, M.Ogawa In-beam γ-ray spectroscopy of 248, 250, 252Cf by neutron-transfer reactions using a Cf target NUCLEAR REACTIONS 249,250,251Cf(18O, 16O), (18O, n16O), (18O, 17O), (18O, n17O), (18O, 18O), (18O, n18O), (18O, n18O), , E=153 MeV; measured Eγ, Iγ, γγ-, (particle)γ-coin. 248,250,252Cf; deduced levels, J, π, ground-state rotational bands, moments of inertia. Radioactive Cf target with 63% 249Cf, 13% 250Cf, 24% 251Cf.
doi: 10.1103/PhysRevC.81.057303
2008IS05 Phys.Rev. C 78, 054309 (2008) T.Ishii, H.Makii, M.Asai, K.Tsukada, A.Toyoshima, M.Matsuda, A.Makishima, S.Shigematsu, J.Kaneko, T.Shizuma, H.Toume, I.Hossain, T.Kohno, M.Ogawa Observation of high-j quasiparticle states in 249Cm by in-beam γ-ray spectroscopy using heavy-ion transfer reactions NUCLEAR REACTIONS 248Cm(16O, 15O), (18O, 17O), E=162 MeV; 248Cm(13C, 12C), E=120 MeV; measured Eγ, Iγ, γγ-coin, half-lives, σ. 249Cm; deduced levels, J, π, bands, configurations.
doi: 10.1103/PhysRevC.78.054309
2008TO05 Radiochim.Acta 96, 323 (2008) A.Toyoshima, Y.Kasamatsu, Y.Kitatsuji, K.Tsukada, H.Haba, A.Shinohara, Y.Nagame Development of an electrochemistry apparatus for the heaviest elements
doi: 10.1524/ract.2008.1498
2007HA29 Eur.Phys.J. D 45, 81 (2007) H.Haba, T.Akiyama, D.Kaji, H.Kikunaga, T.Kuribayashi, K.Morimoto, K.Morita, K.Ooe, N.Sato, A.Shinohara, T.Takabe, Y.Tashiro, A.Toyoshima, A.Yoneda, T.Yoshimura Startup of superheavy element chemistry at RIKEN NUCLEAR REACTIONS 169Tm(40Ar, 3n), E=170 MeV; 208Pb(40Ar, 3n), E=199 MeV; 238U(22Ne, 5n), E=105.9-120.9 MeV; 248Cm(18O, 5n), E=94.4 MeV; measured Eα, Iα, superheavy element production yields using a gas filled recoil separator.
doi: 10.1140/epjd/e2007-00135-4
2007IS09 Phys.Rev. C 76, 011303 (2007) T.Ishii, H.Makii, M.Asai, H.Koura, S.Shigematsu, K.Tsukada, A.Toyoshima, M.Matsuda, A.Makishima, J.Kaneko, H.Toume, I.Hossain, T.Shizuma, S.Ichikawa, T.Kohno, M.Ogawa Ground-state bands of neutron-rich 236Th and 242U nuclei and implication of spherical shell closure at N = 164 NUCLEAR REACTIONS 238U(18O, 20Ne), E=200 MeV; 244Pu(16O, 20Ne), E=162 MeV; measured Eγ, Iγ, (particle)γ-coinc. 236Th, 242U deduced levels, J, π.
doi: 10.1103/PhysRevC.76.011303
2007IS11 Phys.Atomic Nuclei 70, 1457 (2007) T.Ishii, S.Shigematsu, H.Makii, M.Asai, K.Tsukada, A.Toyoshima, M.Matsuda, A.Makishima, T.Shizuma, J.Kaneko, I.Hossain, H.Toume, M.Ohara, S.Ichikawa, T.Kohno, M.Ogawa In-beam γ-ray study of the neutron-rich nuclei 240U, 246Pu, and 250Cm produced by the (18O, 16O) reaction NUCLEAR REACTIONS U(18O, 16O)240U, E=200 MeV; 244Pu(18O, 16O)246Pu, E=200 MeV; 248Cm(18O, 16O), e=200 meV; measured Eγ, Iγ, (particle)γ-coinc. 240U, 246Pu, 250Cm deduced levels, J, π, moments of inertia.
doi: 10.1134/S1063778807080224
2007MA82 Phys.Rev. C 76, 061301 (2007) H.Makii, T.Ishii, M.Asai, K.Tsukada, A.Toyoshima, M.Matsuda, A.Makishima, J.Kaneko, H.Toume, S.Ichikawa, S.Shigematsu, T.Kohno, M.Ogawa Z dependence of the N = 152 deformed shell gap: In-beam γ-ray spectroscopy of neutron-rich 245, 246Pu NUCLEAR REACTIONS 244Pu(18O, 17O), (18O, 16O), E=162 MeV; measured Eγ, Iγ, γγ-coin, half-lives. 245,246Pu; deduced levels, J, π, configurations. Compared with experimental and calculated values for the first 2+ level energy in 232,234,236,238,240,242U, 234,236,238,240,242,244,248Pu, 240,242,244,246,248,250Cm, 244,246,248,250,252,254Cf, 250,252,254,256Fm, 248,250,252,254,256,258No. 247Cm, 249Cf, 251Fm, 253No; systematics.
doi: 10.1103/PhysRevC.76.061301
2006IS07 J.Phys.Soc.Jpn. 75, 043201 (2006) T.Ishii, S.Shigematsu, H.Makii, M.Asai, K.Tsukada, A.Toyoshima, M.Matsuda, A.Makishima, T.Shizuma, J.Kaneko, I.Hossain, H.Toume, M.Ohara, S.Ichikawa, T.Kohno, M.Ogawa Ground-State Band of the Neutron-Rich Transuranium Nucleus 250Cm154 NUCLEAR REACTIONS 248Cm(18O, 16O), E=162 MeV; measured Eγ, Iγ, (particle)γ-coin. 250Cm deduced levels, J, π.
doi: 10.1143/JPSJ.75.043201
2005NA46 Radiochim.Acta 93, 519 (2005) Y.Nagame, K.Tsukada, M.Asai, A.Toyoshima, K.Akiyama, Y.Ishii, T.Kaneko-Sato, M.Hirata, I.Nishinaka, S.Ichikawa, H.Haba, S.Enomoto, K.Matsuo, D.Saika, Y.Kitamoto, H.Hasegawa, Y.Tani, W.Sato, A.Shinohara, M.Ito, J.Saito, S.Goto, H.Kudo, H.Kikunaga, N.Kinoshita, A.Yokoyama, K.Sueki, Y.Oura, H.Nakahara, M.Sakama, M.Schadel, W.Bruchle, J.V.Kratz Chemical studies on rutherfordium (Rf) at JAERI NUCLEAR REACTIONS 248Cm(18O, 5n), E ≈ 90-100 MeV; measured excitation function. Chemical properties of rutherfordium studied.
doi: 10.1524/ract.2005.93.9-10.519
2004NA10 Nucl.Phys. A734, 124 (2004) Y.Nagame, H.Haba, K.Tsukada, M.Asai, A.Toyoshima, S.Goto, K.Akiyama, T.Kaneko, M.Sakama, M.Hirata, T.Yaita, I.Nishinaka, S.Ichikawa, H.Nakahara Chemical studies of the heaviest elements
doi: 10.1016/j.nuclphysa.2004.01.021
2003AS01 Eur.Phys.J. A 16, 17 (2003) M.Asai, K.Tsukada, S.Ichikawa, M.Sakama, H.Haba, Y.Nagame, I.Nishinaka, K.Akiyama, A.Toyoshima, T.Kaneko, Y.Oura, Y.Kojima, M.Shibata Identification of the new isotope 241Bk NUCLEAR REACTIONS 239Pu(6Li, 4n), E=34-42 MeV; measured prompt and delayed Eγ, Iγ, (X-ray)γ-, (recoil)γ-coin; deduced evidence for 241Bk. Isotope separator. RADIOACTIVITY 241Bk(EC) [from 239Pu(6Li, 4n)]; measured Eγ, Iγ, (X-ray)γ-coin, T1/2; deduced ground-state configuration.
doi: 10.1140/epja/i2002-10112-y
2003NA10 Yad.Fiz. 66, 1167 (2003); Phys.Atomic Nuclei 66, 1131 (2003) Y.Nagame, M.Asai, H.Haba, K.Tsukada, I.Nishinaka, S.Goto, A.Toyoshima, K.Akiyama, M.Sakama, Y.L.Zhao, S.Ichikawa, H.Nakahara Heavy Element Nuclear Chemistry at JAERI NUCLEAR REACTIONS 248Cm(18O, 5n), E=92-99 MeV; 248Cm(19F, 5n), E=106 MeV; measured σ. RADIOACTIVITY 233,234,235,236,236mAm, 237,238Cm(α), (EC) [from 233,235U, 237Np(6Li, xn)]; measured T1/2, Eα, α-branching ratios.
doi: 10.1134/1.1586427
2002AS08 J.Nucl.Radiochem.Sci. 3, No 1, 187 (2002) M.Asai, M.Sakama, K.Tsukada, S.Ichikawa, H.Haba, I.Nishinaka, Y.Nagame, S.Goto, K.Akiyama, A.Toyoshima, Y.Kojima, Y.Oura, H.Nakahara, M.Shibata, K.Kawade Decay Studies of Neutron-deficient Am, Cm, and Bk Nuclei Using an On-line Isotope Separator RADIOACTIVITY 235,236Am(EC) [from 233,235U(6Li, xn)]; measured prompt and delayed Eγ, Iγ, γγ-coin; deduced log ft. 235,236Pu deduced levels, J, π, configurations. 233,234,235,236Am, 237,238Cm(α) [from 233,235U, 237Np(6Li, xn)]; measured Eα, T1/2. Isotope separator.
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2002NA37 J.Nucl.Radiochem.Sci. 3, No 1, 85 (2002) Y.Nagame, M.Asai, H.Haba, S.Goto, K.Tsukada, I.Nishinaka, K.Nishio, S.Ichikawa, A.Toyoshima, K.Akiyama, H.Nakahara, M.Sakama, M.Schadel, J.V.Kratz, H.W.Gaggeler, A.Turler Production Cross Sections of 261Rf and 262Db in Bombardments of 248Cm with 18O and 19F Ions NUCLEAR REACTIONS 248Cm(18O, 5n), E=91, 94, 99 MeV; 248Cm(19F, 5n), E=106 MeV; measured delayed Eα, αα-coin; deduced production σ.
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