Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Kosuke Morita Last modified date:2021.06.15

Professor / Experimental Particle Physics / Department of Physics / Faculty of Sciences


Papers
1. Tanaka, T (Tanaka, Taiki)[ 1,2 ] ; Narikiyo, Y (Narikiyo, Yoshihiro)[ 1,2 ] ; Morita, K (Morita, Kosuke)[ 1,2 ] ; Fujita, K (Fujita, Kunihiro)[ 1,2 ] ; Kaji, D (Kaji, Daiya)[ 1 ] ; Morimoto, K (Morimoto, Kouji)[ 1 ] ; Yamaki, S (Yamaki, Sayaka)[ 1,3 ] ; Wakabayashi, Y (Wakabayashi, Yasuo)[ 1 ] ; Tanaka, K (Tanaka, Kengo)[ 1,4 ] ; Takeyama, M (Takeyama, Mirei)[ 1,5 ] ; Yoneda, A (Yoneda, Akira)[ 1 ] ; Haba, H (Haba, Hiromitsu)[ 1 ] ; Komori, Y (Komori, Yukiko)[ 1 ] ; Yanou, S (Yanou, Shinya)[ 1 ] ; Gall, BJP (Gall, Benoit Jean-Paul)[ 1,6 ] ; Asfari, Z (Asfari, Zouhair)[ 1,6 ] ; Faure, H (Faure, Hugo)[ 1,6 ] ; Hasebe, H (Hasebe, Hiroo)[ 1 ] ; Huang, MH (Huang, Minghui)[ 1 ] ; Kanaya, J (Kanaya, Jumpei)[ 1 ] ; Murakami, M (Murakami, Masashi)[ 1 ] ; Yoshida, A (Yoshida, Atsushi)[ 1 ] ; Yamaguchi, T (Yamaguchi, Takayuki)[ 3 ] ; Tokanai, F (Tokanai, Fuyuki)[ 1,7 ] ; Yoshida, T (Yoshida, Tomomi)[ 1,7 ] ; Yamamoto, S (Yamamoto, Shoya)[ 1,2 ] ; Yamano, Y (Yamano, Yuki)[ 1,2 ] ; Watanabe, K (Watanabe, Kenyu)[ 1,2 ] ; Ishizawa, S (Ishizawa, Satoshi)[ 1,5 ] ; Asai, M (Asai, Masato)[ 8 ] ; Aono, R (Aono, Ryuji)[ 9 ] ; Goto, S (Goto, Shin-ichi)[ 9 ] ; Katori, K (Katori, Kenji)[ 1 ] ; Hagino, K (Hagino, Kouichi)[ 10,11 ] ...非表示, Determination of Fusion Barrier Distributions from Quasielastic Scattering Cross Sections towards Superheavy Nuclei Synthesis, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 87, 1, 014201, 2018.01, In order to study the nucleus-nucleus interactions for syntheses of superheavy nuclei, we measured excitation functions for the quasielastic scattering of Ca-48+Pb-208, Ti-50+Pb-208, and Ca-48+Cm-248 using the gas-filled-type recoil ion separator GARIS. The quasielastic scattering events were clearly separated from deep-inelastic events by using GARIS and its focal plan detectors, except for high-incident-energy points. The quasielastic barrier distributions were successfully extracted for these systems, and compared with coupled-channels calculations. The results of the calculations indicate that vibrational and rotational excitations of the colliding nuclei, as well as neutron transfers before contact, strongly affect the structure of the barrier distribution. For the reactions of Ca-48+Pb-208 and Ti-50+Pb-208, a local maximum of the barrier distribution occurred at the same energy as the peak of the 2n evaporation cross section of the system. On the other hand, for the hot fusion reaction of Ca-48+Cm-248, the 4n evaporation cross section of the system peaks at energies well above the maximum of the barrier distribution. This may be attributed to the deformation of the target nucleus. We argue that these findings can be utilized to locate the optimal energy for future searches for undiscovered superheavy nuclei..
2. Yoshitaka Kasamatsu, Takuya Yokokita, Keigo Toyomura, Yudai Shigekawa, Hiromitsu Haba, Jumpei Kanaya, Minghui Huang, Yutaka Ezaki, Takashi Yoshimura, Kosuke Morita, Atsushi Shinohara,, Coprecipitation experiment with Sm hydroxide using a multitracer produced by nuclear spallation reaction: A tool for chemical studies with superheavy elements, Applied Radiation and Isotopes, 118, 105-116, 2016.12.
3. Julia Even,Dieter Ackermann,Masato Asai,Michael Block,Holger Brand,Antonio Di NittoChristoph E. DüllmannRobert EichlerFangli FanHiromitsu HabaWilli HartmannAnnett HübnerFritz P. HeßbergerMinqhiu HuangEgon JägerDaiya KajiJumpei KanayaYusuke KaneyaJadambaa KhuyagbaatarBirgit KindlerJens V. KratzJörg KrierYuki KudouNikolaus KurzMustapha LaatiaouiBettina LommelJoachim Maurer,Sunao Miyashita,Kouji Morimoto,Kosuke Morita,Masashi Murakam,iYuichiro Nagame,Heino Nitsche,Kazuhiro OoeZhi QinTetsuya ,K. Sato,Matthias Schädel,Jutta Steiner,Takayuki Sumita,Mirei Takeyama,Kengo Tanaka,Atsushi Toyoshima,Kazuaki Tsukada,Andreas TürlerIlya Usoltsev,Yasuo Wakabayashi,Yang Wang,Norbert Wiehl,Alexander Yakushev,Sayaka Yamak, In situ synthesis of volatile carbonyl complexes with short-lived nuclides, Journal of Radioanalytical and Nuclear Chemistry, 303, 2457, 2015.03, Rapid in situ formation of metal carbonyl complexes with short-lived nuclides has been demonstrated to be feasible with recoiling ions formed in nuclear fusion and fission reactions. These carbonyl complexes are highly volatile and can be transported rapidly in a gas-stream to counting or chemistry devices. This method was already successfully applied in the chemical investigation of the superheavy element seaborgium (Z = 106) and appears promising for various fields of nuclear research. In this article, we give an overview on the current status of metal carbonyl complex studies with short-lived d-element isotopes..
4. Kaji, D (Kaji, Daiya)[ 1 ] ; Morita, K (Morita, Kosuke)[ 1,2 ] ; Morimoto, K (Morimoto, Kouji)[ 1 ] ; Haba, H (Haba, Hiromitsu)[ 1 ] ; Asai, M (Asai, Masato)[ 3 ] ; Fujita, K (Fujita, Kunihiro)[ 1,2 ] ; Gan, ZG (Gan, Zaiguo)[ 4 ] ; Geissel, H (Geissel, Hans)[ 5 ] ; Hasebe, H (Hasebe, Hiroo)[ 1 ] ; Hofmann, S (Hofmann, Sigurd)[ 5 ] ; Huang, MH (Huang, MingHui)[ 1 ] ; Komori, Y (Komori, Yukiko)[ 1 ] ; Ma, L (Ma, Long); Maurer, J (Maurer, Joachim)[ 5 ] ; Murakami, M (Murakami, Masashi)[ 1,6,9 ] ; Takeyama, M (Takeyama, Mirei)[ 1,7 ] ; Tokanai, F (Tokanai, Fuyuki)[ 7 ] ; Tanaka, T (Tanaka, Taiki)[ 1,2 ] ; Wakabayashi, Y (Wakabayashi, Yasuo)[ 1 ] ; Yamaguchi, T (Yamaguchi, Takayuki)[ 8 ] ; Yamaki, S (Yamaki, Sayaka)[ 1,8 ] ; Yoshida, A (Yoshida, Atsushi)[ 1 ] , Study of the Reaction Ca-48+Cm-248 -> (296)Lv* at RIKEN-GARIS, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 86, 3, 034201, 2017.03, The fusion reaction Ca-48 + Cm-248 -> (296)Lv* was investigated using the gas-filled recoil ion separator GARIS at RIKEN. The reaction was studied at excitation energies of 41.3 and 38.2 MeV. A total of seven decay chains were observed. Three of the chains were assigned to the decay of (292)Lv and three to the decay of (293)Lv. A possible observation of an a-decay branch of (284)Cn populating the new spontaneously fissioning nucleus (280)Ds is discussed. The assignment of one of the decay chains to the 3n evaporation channel, resulting in a spontaneous fission branch of (285)Cn, or to the 2n channel, resulting in the population of the new fissioning nucleus (286)Cn, is ambiguous. Measured cross sections are in agreement with previously published values..
5. 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, Phys. Rev. Lett., 120, 152501-152501, 2018.04, 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..
6. D.Kaji, K.Morimoto, H.Haba, Y.Wakabayashi, M.Takeyama, S.Yamaki, Y.Komori, S.Yanou, S.-i.Goto, K.Morita, Decay Measurement of 283Cn Produced in the 238U(48Ca, 3n) Reaction Using GARIS-II, J.Phys.Soc.Jpn., 86, 085001, 2017.08, NUCLEAR REACTIONS 238U(48Ca, 3n), E=251.8 MeV; measured reaction products; deduced σ. Comparison with available data..
7. S.Hofmann, S.Heinz, R.Mann, J.Maurer, G.Munzenberg, S.Antalic, W.Barth, H.G.Burkhard, L.Dahl, K.Eberhardt, R.Grzywacz, J.H.Hamilton, R.A.Henderson, J.M.Kenneally, B.Kindler, I.Kojouharov, R.Lang, B.Lommel, K.Miernik, D.Miller, K.J.Moody, K.Morita, K.Nishio, A.G.Popeko, J.B.Roberto, J.Runke, K.P.Rykaczewski, S.Saro, C.Scheidenberger, H.J.Schott, D.A.Shaughnessy, M.A.Stoyer, P.Thorle-Pospiech, K.Tinschert, N.Trautmann, J.Uusitalo, A.V.Yeremin, Review of even element super-heavy nuclei and search for element, Eur.Phys.J, A52, 180, 2016.06, Review of even element super-heavy nuclei and search for element.
8. S.Hofmann, S.Heinz, R.Mann, J.Maurer, G.Munzenberg, S.Antalic, W.Barth, L.Dahl, K.Eberhardt, R.Grzywacz, J.H.Hamilton, R.A.Henderson, J.M.Kenneally, B.Kindler, I.Kojouharov, R.Lang, B.Lommel, K.Miernik, D.Miller, K.J.Moody, K.Morita, K.Nishio, A.G.Popeko, J.B.Roberto, J.Runke, K.P.Rykaczewski, C.Scheidenberger, D.A.Shaughnessy, M.A.Stoyer, P.Thorle-Pospiech, K.Tinschert, N.Trautmann, J.Uusitalo, A.V.Yeremin, Remarks on the fission barriers of super-heavy nuclei, Eur.Phys.J., A52, 116, 2016.04, RADIOACTIVITY 285Fl, 291,292,293Lv, 294Og(α); calculated mass excess, Qα, shell correction energies for complete α-decay chains. Z=118, 120(α); deduced estimates for synthesis σ. Compared with calculations using macroscopic-microscopic models..
9. D.Kaji, K.Morimoto, H.Haba, E.Ideguchi, H.Koura, K.Morita, Decay Properties of New Isotopes 234Bk and 230Am, and Even-Even Nuclides 234Cm and 230Pu, J.Phys.Soc.Jpn., 85, 015002, 2016.01, RADIOACTIVITY 234Bk(α), (EC) [from 197Au(40Ar, 3n)234Bk, E=89.5 MeV]; measured decay products, Eα, Iα; deduced T1/2. Comparison with available data..
10. K.Morita, SHE research at RIKEN/GARIS, Nucl.Phys. A, 944, 30, 2015.12, NUCLEAR REACTIONS 208Pb, 209Bi(64Ni, n), E=308-318 MeV;208Pb, 209Bi(70Zn, n), E=320, 323 MeV; measured Eα, Iα(θ), αα-coin, other reaction products using PSD (Position Sensitive Detectors). 270Mt, 274Rg, 278Nh deduced new superheavy isotopes σ..
11. G.Munzenberg, K.Morita, Synthesis of the heaviest nuclei in cold fusion reactions, Nucl.Phys. A, 944, 3, 2015.12, Synthesis of the heaviest nuclei in cold fusion reactions.
12. 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, Phys.Rev. C, 89, 024618, 2014.02, 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.
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