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Journal Articles

Molybdenum adsorption properties of alumina-embedded mesoporous silica for medical radioisotope production

Saptiama, I.*; Kaneti, Y. V.*; Oveisi, H.*; Suzuki, Yoshitaka; Tsuchiya, Kunihiko; Takai, Kimiko*; Sakae, Takeji*; Pradhan, S.*; Hossain, M. S. A.*; Fukumitsu, Nobuyoshi*; et al.

Bulletin of the Chemical Society of Japan, 91(2), p.195 - 200, 2018/02

https://doi.org/10.1246/bcsj.20170295
 Times Cited Count：49 Percentile：80.94(Chemistry, Multidisciplinary)

no abstracts in English

Journal Articles

Mesoporous alumina as an effective adsorbent for molybdenum (Mo) toward Instant production of radioisotope for medical use

Saptiama, I.*; Kaneti, Y. V.*; Suzuki, Yumi*; Suzuki, Yoshitaka; Tsuchiya, Kunihiko; Sakae, Takeji*; Takai, Kimiko*; Fukumitsu, Nobuyoshi*; Alothman, Z. A.*; Hossain, M. S. A.*; et al.

Bulletin of the Chemical Society of Japan, 90(10), p.1174 - 1179, 2017/10

https://doi.org/10.1246/bcsj.20170184
 Times Cited Count：45 Percentile：77.14(Chemistry, Multidisciplinary)

no abstracts in English

Journal Articles

Observation of high-$$j$$ quasiparticle states in $$^{249}$$Cm by in-beam $$gamma$$-ray spectroscopy using heavy-ion transfer reactions

Ishii, Tetsuro; Makii, Hiroyuki*; Asai, Masato; Tsukada, Kazuaki; Toyoshima, Atsushi; Matsuda, Makoto; Makishima, Akiyasu*; Shigematsu, Soichiro*; Kaneko, Junichi*; Shizuma, Toshiyuki; et al.

Physical Review C, 78(5), p.054309_1 - 054309_11, 2008/11

https://doi.org/10.1103/PhysRevC.78.054309
 Times Cited Count：16 Percentile：67.40(Physics, Nuclear)

Journal Articles

In-beam $$gamma$$-ray spectroscopy of neutron-rich nuclei in the uranium region through the heavy-ion transfer reaction

Ishii, Tetsuro; Makii, Hiroyuki; Asai, Masato; Koura, Hiroyuki; Shigematsu, Soichiro*; Tsukada, Kazuaki; Toyoshima, Atsushi; Matsuda, Makoto; Makishima, Akiyasu*; Shizuma, Toshiyuki; et al.

Nuclear Physics A, 805(1-4), p.257 - 259, 2008/06

https://doi.org/10.1016/j.nuclphysa.2008.02.090

no abstracts in English

Journal Articles

In-beam $$gamma$$-ray study of the neutron-rich nuclei of $$^{240}$$U, $$^{246}$$Pu, and $$^{250}$$Cm produced by the ($$^{18}$$O, $$^{16}$$O) reaction

Ishii, Tetsuro; Shigematsu, Soichiro*; Makii, Hiroyuki; Asai, Masato; Tsukada, Kazuaki; Toyoshima, Atsushi; Matsuda, Makoto; Makishima, Akiyasu*; Shizuma, Toshiyuki; Kaneko, Junichi*; et al.

Physics of Atomic Nuclei, 70(8), p.1457 - 1461, 2007/08

https://doi.org/10.1134/S1063778807080224
 Times Cited Count：11 Percentile：60.73(Physics, Nuclear)

We have measured deexcitation $$gamma$$ rays in the neutron-rich nuclei of $$^{240}$$U, $$^{246}$$Pu and $$^{250}$$Cm. These nuclei were produced by the ($$^{18}$$O, $$^{16}$$O) two-neutron transfer reactions with a 200, 162 and 162 MeV $$^{18}$$O beams and a $$^{238}$$U, $$^{244}$$Pu and $$^{248}$$Cm targets, respectively, using the tandem accelerator at Tokai, Japan. The $$gamma$$ rays in residual nuclei were measured by taking coincidence with scattering particles using Si $$Delta E$$-$$E$$ detectors. We have identified $$gamma$$ rays in $$^{240}$$U, $$^{246}$$Pu and $$^{250}$$Cm by selecting the kinetic energies of $$^{16}$$O particles which correspond to the excitation energies in these nuclei below their neutron separation energies. The ground-state bands of $$^{240}$$U, $$^{246}$$Pu and $$^{250}$$Cm were established up to 12$$^{+}$$ states and the $$K^{pi}=0^{-}$$ octupole band of $$^{240}$$U was established up to 9$$^{-}$$ state. Because the deformations of these nuclei are well developed, the moments of inertia reflect the pairing gap, which is expected to be smaller, resulting in a larger moment of inertia, at the deformed shell closure. We have found that the moment of inertia of the ground-state band of $$^{248}$$Cm$$_{152}$$ is considerably larger than that of $$^{250}$$Cm$$_{154}$$. This fact supports the existence of the deformed subshell closure at $$N=152$$ in Cm isotopes. On the other hand, the moment of inertia of $$^{246}$$Pu$$_{152}$$ was found to be smaller than that of $$^{244}$$Pu$$_{150}$$, which suggests that the deformed subshell closure at $$N=152$$ weakens or disappears in Pu isotopes. These results are consistent with the prediction by a cranking model calculation.

Journal Articles

Ground-state bands of neutron-rich $$^{236}$$Th and $$^{242}$$U nuclei and implication of spherical shell closure at $$N=164$$

Ishii, Tetsuro; Makii, Hiroyuki; Asai, Masato; Koura, Hiroyuki; Shigematsu, Soichiro*; Tsukada, Kazuaki; Toyoshima, Atsushi; Matsuda, Makoto; Makishima, Akiyasu*; Kaneko, Junichi*; et al.

Physical Review C, 76(1), p.011303_1 - 011303_5, 2007/07

https://doi.org/10.1103/PhysRevC.76.011303
 Times Cited Count：15 Percentile：68.70(Physics, Nuclear)

The ground-state bands of the neutron-rich $$^{236}$$Th and $$^{242}$$U nuclei were established up to spin 10 and 8, respectively, by in-beam $$gamma$$-ray spectroscopy using the ($$^{18}$$O, $$^{20}$$Ne) two-proton pickup reaction with a $$^{238}$$U and a $$^{244}$$Pu target. Deexcitation $$gamma$$ rays in $$^{236}$$Th and $$^{242}$$U were identified by selecting the kinetic energies of $$^{20}$$Ne using Si $$Delta E$$-$$E$$ detectors. The excitation energies of the first 2$$^{+}$$ states in U and Pu isotopes have local minima at $$N simeq 146$$, suggesting the possibility that nuclei with $$Z simeq 92$$ have a spherical shell closure of $$N=164$$. Calculation using the Koura-Yamada single-particle potential gives an energy gap of 1.8 MeV at $$N=164$$ for $$^{256}$$U.

Journal Articles

Ground-state band of the neutron-rich transuranium nucleus $$^{250}$$Cm$$_{154}$$

Ishii, Tetsuro; Shigematsu, Soichiro; Makii, Hiroyuki; Asai, Masato; Tsukada, Kazuaki; Toyoshima, Atsushi; Matsuda, Makoto; Makishima, Akiyasu*; Shizuma, Toshiyuki; Kaneko, Junichi*; et al.

Journal of the Physical Society of Japan, 75(4), p.043201_1 - 043201_4, 2006/04

https://doi.org/10.1143/JPSJ.75.043201
 Times Cited Count：19 Percentile：67.70(Physics, Multidisciplinary)

The ground-state band of the neutron-rich transuranium nucleus $$^{250}$$Cm was established up to spin 12 by in-beam $$gamma$$-ray spectroscopy using the two-neutron-transfer reaction with a $$^{248}$$Cm target and a 162 MeV $$^{18}$$O beam. Deexcitation $$gamma$$ rays in $$^{250}$$Cm were identified by selecting the kinetic energies of $$^{16}$$O particles with Si $$Delta E$$-$$E$$ detectors. The moment of inertia of $$^{250}$$Cm$$_{154}$$ is considerably smaller than that of $$^{248}$$Cm$$_{152}$$, which supports the existence of the deformed subshell closure at $$N=152$$ in Cm isotopes.

Journal Articles

In-beam $$gamma$$-ray spectroscopy of $$^{240}$$U using the ($$^{18}$$O,$$^{16}$$O) reaction

Ishii, Tetsuro; Shigematsu, Soichiro; Asai, Masato; Makishima, Akiyasu*; Matsuda, Makoto; Kaneko, Junichi*; Hossain, I.*; Ichikawa, Shinichi; Kono, Toshiyuki*; Ogawa, Masao*

Physical Review C, 72(2), p.021301_1 - 021301_5, 2005/08

https://doi.org/10.1103/PhysRevC.72.021301
 Times Cited Count：20 Percentile：75.62(Physics, Nuclear)

In the two-neutron-transfer reaction of a 200-MeV $$^{18}$$O beam with a $$^{238}$$U target, deexcitation $$gamma$$ rays in a neutron-rich nucleus of $$^{240}$$U were measured. The $$gamma$$ rays in $$^{240}$$U were identified by taking coincidence with $$^{16}$$O, using Si $$Delta E$$-$$E$$ detectors. The kinetic energies of $$^{16}$$O particles allowed us to select the excitation energies of $$^{240}$$U below the neutron separation energy. The ground-state band and the $$K^{pi}=0^{-}$$ octupole band of $$^{240}$$U were established up to 12$$^{+}$$ and 9$$^{-}$$, respectively. The octupole-band head of $$^{240}$$U is higher than those of $$^{236,238}$$U by about a hundred keV, suggesting that a secondary maximum of octupole correlations exists at $$N=144-146$$ in U isotopes.

Journal Articles

Gamma-ray spectroscopy of the neutron-rich Ni region through heavy-ion deep-inelastic collisions

Ishii, Tetsuro; Asai, Masato; Makishima, Akiyasu*; Hossain, I.*; Kleinheinz, P.*; Ogawa, Masao*; Matsuda, Makoto; Ichikawa, Shinichi

European Physical Journal A, 13(1-2), p.15 - 19, 2002/01

https://doi.org/10.1140/epja1339-04

no abstracts in English

Journal Articles

Nano-second isomers in neutron-rich Ni region produced by deep-inelastic collisions

Ishii, Tetsuro; Asai, Masato; Matsuda, Makoto; Ichikawa, Shinichi; Makishima, Akiyasu*; Hossain, I.*; Kleinheinz, P.*; Ogawa, Masao*

Acta Physica Polonica B, 32(3), p.739 - 746, 2001/03

http://www.actaphys.uj.edu.pl/_cur/store/vol32/pdf/v32p0739.pdf

no abstracts in English

Journal Articles

Nanosecond isomers in neutro-rich $$^{67}$$Cu and $$^{64}$$Co and a fast ${it E3}$ transition in $$^{67}$$Cu

Asai, Masato; Ishii, Tetsuro; Makishima, Akiyasu*; Hossain, I.*; Ogawa, Masao*; Ichikawa, Shinichi

Physical Review C, 62(5), p.054313_1 - 054313_7, 2000/11

https://doi.org/10.1103/PhysRevC.62.054313
 Times Cited Count：19 Percentile：68.71(Physics, Nuclear)

no abstracts in English

Journal Articles

Core-excited states in the doubly magic $$^{68}$$Ni and its neighbor $$^{69}$$Cu

Ishii, Tetsuro; Asai, Masato*; Makishima, A.*; Hossain, I.*; Ogawa, Masao*; Hasegawa, Jun*; Matsuda, Makoto; Ichikawa, Shinichi

Physical Review Letters, 84(1), p.39 - 42, 2000/01

https://doi.org/10.1103/PhysRevLett.84.39
 Times Cited Count：66 Percentile：87.64(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Core-excited states in the doubly magic $$^{68}$$Ni and its neighbor $$^{69}$$Cu

Ishii, Tetsuro; Asai, Masato*; Makishima, Akiyasu*; Hossain, I.*; Ogawa, Masao*; Hasegawa, Jun*; Matsuda, Makoto*; Ichikawa, Shinichi

AIP Conference Proceedings 495, p.67 - 70, 1999/12

https://doi.org/10.1063/1.1301740

no abstracts in English

Journal Articles

The ($$nu$$g$$_{9/22}$$$$pi$$p$$_{3/2}$$)$$_{19/2}$$- isomer in $$^{71}$$Cu and the prediction of its $$E2$$ decay from the shell model

Ishii, Tetsuro; Asai, Masato*; Hossain, I.*; P.Kleinheinz*; Ogawa, Masao*; Makishima, Akiyasu*; Ichikawa, Shinichi; ; ; J.Blomqvist*

Physical Review Letters, 81(19), p.4100 - 4103, 1998/11

https://doi.org/10.1103/PhysRevLett.81.4100
 Times Cited Count：43 Percentile：82.82(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Isomer-scope: A new instrument for in-beam $$gamma$$-ray spectroscopy through deep inelastic collisions

Ishii, Tetsuro; ; ; Makishima, Akiyasu*; Hossain, I.*; Hayakawa, Takehito*; Kono, Toshiyuki*; Ogawa, Masao*

Nuclear Instruments and Methods in Physics Research A, 395(2), p.210 - 216, 1997/00

https://doi.org/10.1016/S0168-9002(97)00720-1
 Times Cited Count：43 Percentile：92.52(Instruments & Instrumentation)

no abstracts in English

Oral presentation

High-j quasi-particle states in $$^{249}$$Cm

Ishii, Tetsuro; Makii, Hiroyuki; Asai, Masato; Tsukada, Kazuaki; Toyoshima, Atsushi; Matsuda, Makoto; Shizuma, Toshiyuki; Makishima, Akiyasu*; Tome, Hayato*; Shigematsu, Soichiro*; et al.

no journal, , 

no abstracts in English

Oral presentation

In-beam $$gamma$$-ray measurement of the neutron-rich nucleus $$^{250}_{96}$$Cm$$_{154}$$

Ishii, Tetsuro; Shigematsu, Soichiro; Makii, Hiroyuki; Asai, Masato; Tsukada, Kazuaki; Toyoshima, Atsushi; Matsuda, Makoto; Makishima, Akiyasu*; Shizuma, Toshiyuki; Kaneko, Junichi*; et al.

no journal, , 

no abstracts in English

Oral presentation

In-beam $$gamma$$-ray spectroscopy of the neutron-rich $$^{236}$$Th and $$^{242}$$U nuclei produced by the ($$^{18}$$O,$$^{20}$$Ne) reaction

Ishii, Tetsuro; Makii, Hiroyuki; Asai, Masato; Shigematsu, Soichiro*; Tsukada, Kazuaki; Toyoshima, Atsushi; Matsuda, Makoto; Makishima, Akiyasu*; Kaneko, Junichi*; Tome, Hayato; et al.

no journal, , 

no abstracts in English

Oral presentation

In-beam $$gamma$$-ray spectroscopy of more neutron-rich nuclei than the $$beta$$-stability line in the U region; $$^{236}$$Th, $$^{240,242}$$U, $$^{246}$$Pu, $$^{250}$$Cm

Ishii, Tetsuro; Makii, Hiroyuki; Asai, Masato; Koura, Hiroyuki; Shigematsu, Soichiro*; Tsukada, Kazuaki; Toyoshima, Atsushi; Matsuda, Makoto; Makishima, Akiyasu*; Shizuma, Toshiyuki; et al.

no journal, , 

The ground-state bands of $$^{236}$$Th,$$^{240,242}$$U, $$^{246}$$Pu and $$^{250}$$Cm were established by measuring deexcitation $$gamma$$ rays. These nuclei were produced by the ($$^{18}$$O, $$^{16}$$O) and ($$^{18}$$O, $$^{20}$$Ne) two-nucleon transfer reactions with $$^{238}$$U, $$^{244}$$Pu and $$^{248}$$Cm targets. The $$gamma$$ rays in residual nuclei were identified by taking coincidence with scattering particles using high-resolution Si $$Delta E$$-$$E$$ detectors. By extending the systematics of the 2$$_{1}^{+}$$ energies into neutron-rich nuclei, we have found that the $$N=152$$ deformed shell gap disappears at $$_{94}$$Pu isotopes and that U and Pu isotopes have the possibility of the spherical shell closure at $$N=164$$.

19 (Records 1-19 displayed on this page)
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