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Search: Author = M.Sakama

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2014SA41      Nucl.Data Sheets 120, 250 (2014)

M.Sakama, Y.Nagano, T.Kitade, O.Shikino, S.Nakayama

Correlation between Asian Dust and Specific Radioactivities of Fission Products Included in Airborne Samples in Tokushima, Shikoku Island, Japan, Due to the Fukushima Nuclear Accident

doi: 10.1016/j.nds.2014.07.059
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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
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2011SA67      J.Korean Phys.Soc. 59, 1995s (2011)

M.Sakama, T.Saze, K.Maeda, K.Akamatsu, E.Honda, H.Nishitani

The Distribution of Thermal Neutron Fluxes into the Self-Shielded Wall Equipped with a Medical Self-Shielded PET (Positron Emission Tomography) Cyclotron

doi: 10.3938/jkps.59.1995
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2008YA05      Phys.Rev. C 77, 021303 (2008)

T.Yamagata, H.Akimune, S.Nakayama, Y.Banshou, M.Fujiwara, K.Fushimi, M.B.Greenfield, K.Hara, K.Y.Hara, H.Hashimoto, H.Ikemizu, K.Kawase, M.Kinoshita, K.Nakanishi, M.Ohta, M.Sakama, M.Tanaka, H.Utsunomiya, N.Warashina, M.Yosoi

Evidence for charged-particle decay of dipole-excited 4H clusters embedded in 6He and 7He

NUCLEAR REACTIONS 6,7Li(7Li, 7Be), E=455 MeV; measured charged particle spectra, (particle)(particle)-coin, branching ratios. 6,7He; measured decay channels, dipole resonances for charged particle decay.

doi: 10.1103/PhysRevC.77.021303
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2006AS03      Phys.Rev. C 73, 067301 (2006)

M.Asai, K.Tsukada, S.Ichikawa, M.Sakama, H.Haba, I.Nishinaka, Y.Nagame, S.Goto, Y.Kojima, Y.Oura, M.Shibata

α decay of 238Cm and the new isotope 237Cm

NUCLEAR REACTIONS 237Np(6Li, X), E=52-59 MeV; measured delayed Eα, Iα; deduced evidence for 236,238Pu, 237Am, 237,238Cm. Mass separator.

RADIOACTIVITY 238Cm(α) [from 237Np(6Li, 5n)]; measured Eα, T1/2. 234Pu deduced 2+ excited state energy. Systematics of 2+ levels discussed.

doi: 10.1103/PhysRevC.73.067301
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2005AS01      Eur.Phys.J. A 23, 395 (2005)

M.Asai, M.Sakama, K.Tsukada, S.Ichikawa, H.Haba, I.Nishinaka, Y.Nagame, S.Goto, Y.Kojima, Y.Oura, H.Nakahara, M.Shibata, K.Kawade

Proton-neutron configurations in 236g, mAm and its EC-decay daughter 236Pu

RADIOACTIVITY 236,236mAm(EC) [from 235U(6Li, 5n)]; measured Eγ, Iγ, γγ-, (X-ray)γ-coin, T1/2; deduced log ft. 236Pu deduced levels, J, π, configurations, β-feeding intensities, B(E1), B(M1). 236Am deduced isomeric state J, π, configuration.

doi: 10.1140/epja/i2004-10096-6
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2005AS05      Phys.Rev.Lett. 95, 102502 (2005)

M.Asai, K.Tsukada, M.Sakama, S.Ichikawa, T.Ishii, Y.Nagame, I.Nishinaka, K.Akiyama, A.Osa, Y.Oura, K.Sueki, M.Shibata

Experimental Identification of Spin-Parities and Single-Particle Configurations in 257No and Its α-Decay Daughter 253Fm

RADIOACTIVITY 257No(α) [from 248Cm(13C, 4n)]; measured Eγ, Eα, E(ce), αγ-, (ce)α-coin; deduced branching ratios. 253Fm deduced levels, J, π, ICC, configurations. 257No deduced ground-state J, π, configuration.

doi: 10.1103/PhysRevLett.95.102502
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2005IC02      Phys.Rev. C 71, 067302 (2005)

S.Ichikawa, M.Asai, K.Tsukada, H.Haba, Y.Nagame, M.Shibata, M.Sakama, Y.Kojima

β-decay half-lives of new neutron-rich rare-earth isotopes 159Pm, 162Sm, and 166Gd

RADIOACTIVITY 159Pm, 162Sm, 166Gd, 166Tb(β-) [from 238U(p, F)]; measured Eγ, Iγ, βγ-, γγ-coin, T1/2. 166Tb deduced levels, β-feeding intensities.

doi: 10.1103/PhysRevC.71.067302
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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
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2004AS12      Eur.Phys.J. A 22, 411 (2004)

M.Asai, M.Sakama, K.Tsukada, S.Ichikawa, H.Haba, I.Nishinaka, Y.Nagame, S.Goto, Y.Kojima, Y.Oura, H.Nakahara, M.Shibata, K.Kawade

EC and α decays of 235Am

RADIOACTIVITY 235Am(EC), (α) [from 233U(6Li, 4n)]; measured Eγ, Iγ, Eα, X-ray spectra, γγ-, αγ-coin; deduced log ft, Qα. 235Am deduced ground-state J, π. 235Pu deduced levels, J, π, ICC, β-feeding intensities. 231Np deduced level energy. Level systematics in neighboring nuclides discussed.

doi: 10.1140/epja/i2004-10044-6
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2004NA04      Nucl.Phys. A731, 355 (2004)

S.Nakayama, T.Yamagata, H.Akimune, M.Fujiwara, K.Fushimi, M.B.Greenfield, K.Hara, K.Y.Hara, K.Hashimoto, K.Ichihara, K.Kawase, Y.Matsui, K.Nakanishi, M.Sakama, M.Tanaka, M.Yosoi

t + 3He molecular structures in 6Li studied by (3He, α) reaction at 450 MeV

NUCLEAR REACTIONS 7Li(3He, α), E=450 MeV; measured Eα, Iα, particle correlations following residual nucleus decay. 6Li deduced resonance energies, widths, cluster features.

doi: 10.1016/j.nuclphysa.2003.11.048
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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
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2004NA12      Nucl.Phys. A734, 461 (2004)

S.Nakayama, T.Yamagata, H.Akimune, M.Fujiwara, K.Fushimi, M.B.Greenfield, K.Hara, K.Y.Hara, H.Hashimoto, K.Ichihara, K.Kawase, Y.Matsui, K.Nakanishi, M.Sakama, M.Tanaka, M.Yosoi

Tri-nucleon cluster-states in 6Li

NUCLEAR REACTIONS 7Li(3He, α), E=450 MeV; measured Eα, decay particle spectra. 6Li deduced resonance energies, widths, cluster structure.

doi: 10.1016/j.nuclphysa.2004.01.086
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2004NA14      Phys.Rev. C 69, 041304 (2004)

S.Nakayama, T.Yamagata, H.Akimune, M.Fujiwara, K.Fushimi, M.B.Greenfield, K.Hara, K.Y.Hara, H.Hashimoto, K.Ichihara, K.Kawase, H.Matsui, K.Nakanishi, M.Sakama, M.Tanaka, M.Yosoi

Trinucleon cluster structures in 6Li

NUCLEAR REACTIONS 7Li(3He, α), E=450 MeV; measured Eα, decay particle spectra, angular correlations. 6Li deduced resonance energies, widths, cluster structure.

doi: 10.1103/PhysRevC.69.041304
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE1896.


2004SA05      Phys.Rev. C 69, 014308 (2004)

M.Sakama, M.Asai, K.Tsukada, S.Ichikawa, I.Nishinaka, Y.Nagame, H.Haba, S.Goto, M.Shibata, K.Kawade, Y.Kojima, Y.Oura, M.Ebihara, H.Nakahara

α-decays of neutron-deficient americium isotopes

RADIOACTIVITY 233,234,235,236Am, 229Np(α) [from 233,235U(6Li, xn) and subsequent decay]; measured Eα, Iα, T1/2, Eγ, X-ray spectra, αγ-coin; deduced hindrance factors. 233,235,236Am deduced Qα. Mass separator.

NUCLEAR REACTIONS 235U(6Li, 5n), 233U(6Li, 4n), (6Li, 5n), (6Li, 6n), E ≈ 34-60 MeV; measured production σ.

doi: 10.1103/PhysRevC.69.014308
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE1888. Data from this article have been entered in the XUNDL database. For more information, click here.


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
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2003GO01      J.Radioanal.Nucl.Chem. 255, 73 (2003)

S.Goto, D.Kaji, I.Nishinaka, Y.L.Nagame, S.Ichikawa, K.Tsukada, M.Asai, H.Haba, S.Mitsuoka, K.Nishio, M.Sakama, Y.Zhao, K.Sueki, K.Tanikawa, K.Takamiya, H.Kudo, H.Nakahara

Characteristics of the asymmetric mass distribution in proton-induced fission of actinides

NUCLEAR REACTIONS 232Th, 233,235,238U(p, F), E=13, 15 MeV; measured fission fragment mass distributions; deduced fragment shell structure effects.

doi: 10.1023/A:1022271529219
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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
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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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2002GO43      J.Nucl.Radiochem.Sci. 3, No 1, 63 (2002)

S.Goto, D.Kaji, I.Nishinaka, Y.Nagame, S.Ichikawa, K.Tsukada, M.Asai, H.Haba, S.Mitsuoka, K.Nishio, M.Sakama, Y.L.Zhao, K.Sueki, M.Tanikawa, K.Takamiya, H.Kudo, H.Nakahara

Systematic Studies of Asymmetric Mass Distributions in Proton-induced Fission of Actinides

NUCLEAR REACTIONS 239,242,244Pu(p, F), E=13 MeV; measured fission fragment kinetic energy and mass distributions; deduced shell effects.


2002IC04      Nucl.Instrum.Methods Phys.Res. B187, 548 (2002)

S.Ichikawa, K.Tsukada, M.Asai, H.Haba, M.Sakama, Y.Kojima, M.Shibata, Y.Nagame, Y.Oura, K.Kawade

Performance of the multiple target He/PbI2 aerosol jet system for mass separation of neutron-deficient actinide isotopes

NUCLEAR REACTIONS 233U(6Li, 4n)235Am, E=52 MeV; 141Pr(6Li, 4n)143Sm, E=37.2 MeV; 237Np(6Li, 6n)237Cm, E=62 MeV; measured reaction products, Eα, Iα. 233,234,235,236Am; decay products energies and T1/2. The isotope separator on line (JAERI-ISOL) at the JAERI tandem accelerator facility.

doi: 10.1016/s0168-583x(01)01145-4
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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.


2001NA30      Acta Phys.Hung.N.S. 13, 121 (2001)

Y.Nagame, Y.L.Zhao, I.Nishinaka, S.Goto, M.Tanikawa, K.Tsukada, M.Asai, H.Haba, M.Sakama, S.Ichikawa, K.Sueki, H.Nakahara

Symmetric and Asymmetric Scission Properties

doi: 10.1556/APH.13.2001.1-3.13
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2001NA46      Radiochim.Acta 89, 681 (2001)

Y.Nagame, Y.L.Zhao, I.Nishinaka, S.Goto, D.Kaji, M.Tanikawa, K.Tsukada, M.Asai, H.Haba, M.Sakama, S.Ichikawa, K.Sueki, H.Kudo, H.Nakahara

Characteristics of Two Fission Modes

NUCLEAR REACTIONS 232Th, 238U, 244Pu, 248Cm(p, F), E=11-16 MeV; measured fission fragments total kinetic energies, mass yield distributions; deduced two fission modes, deformation effects.


2000SA52      Eur.Phys.J. A 9, 303 (2000)

M.Sakama, K.Tsukada, M.Asai, S.Ichikawa, H.Haba, S.Goto, Y.Oura, I.Nishinaka, Y.Nagame, M.Shibata, Y.Kojima, K.Kawade, M.Ebihara, H.Nakahara

New Isotope 233Am

RADIOACTIVITY 233Am, 229Np(α), (EC) [from 233U(6Li, X), E=63 MeV]; measured Eα, T1/2, α-branching ratio, αα(t), (x-ray)α-coin following mass separation. Comparison with results of nearby isotopes, ISOL technique.

NUCLEAR REACTIONS 233U(6Li, X), E=63 MeV; measured α spectra, αα-coin following compound nucleus decay; deduced evidence for 233Am.

doi: 10.1007/s100500070013
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1999AS03      Phys.Rev. C59, 3060 (1999)

M.Asai, S.Ichikawa, K.Tsukada, M.Sakama, M.Shibata, Y.Kojima, A.Osa, I.Nishinaka, Y.Nagame, K.Kawade, T.Tachibana

β-Decay Half-Lives of New Neutron-Rich Isotopes 167, 168Tb and Levels in 167, 168Dy

RADIOACTIVITY 167,168Tb(β-) [from 238U(p, F)]; measured Eγ, Iγ, βγ-coin, T1/2. 167,168Dy deduced levels, J, π, configurations, rotational band features. Comparisons with neighboring nuclides.

doi: 10.1103/PhysRevC.59.3060
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