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NSR database version of April 11, 2024.

Search: Author = T.Iwakoshi

Found 16 matches.

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2011MI18      Phys.Rev. C 84, 055501 (2011)

K.Minamisono, T.Nagatomo, K.Matsuta, C.D.P.Levy, Y.Tagishi, M.Ogura, M.Yamaguchi, H.Ota, J.A.Behr, K.P.Jackson, A.Ozawa, M.Fukuda, T.Sumikama, H.Fujiwara, T.Iwakoshi, R.Matsumiya, M.Mihara, A.Chiba, Y.Hashizume, T.Yasuno, T.Minamisono

Low-energy test of second-class current in β decays of spin-aligned 20F and 20Na

RADIOACTIVITY 20F(β-)[from 19F(polarized 2H, p), E=6 MeV]; 20Na(β+)[from Si(p, X), E=500 MeV]; measured Eβ, β(θ), βγ(θ) from nuclear spin-polarized nuclei using β-NMR technique; deduced alignment correlation terms, G-parity-violating, second-class current (SCC) induced tensor term, weak-magnetism term in the framework of the conserved vector current hypothesis. Experiments at UTTAC and TRIUMF facilities.

doi: 10.1103/PhysRevC.84.055501
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2011SU16      Phys.Rev. C 83, 065501 (2011)

T.Sumikama, K.Matsuta, T.Nagatomo, M.Ogura, T.Iwakoshi, Y.Nakashima, H.Fujiwara, M.Fukuda, M.Mihara, K.Minamisono, T.Yamaguchi, T.Minamisono

Test of the conserved vector current hypothesis by a β-ray angular distribution measurement in the mass-8 system

RADIOACTIVITY 8Li(β-), (β-α)[from 7Li(d, p), E=3.5 MeV]; 8B (β+), (β+α)[from 6Li(3He, n), E=4.7 MeV]; measured Eβ, Iβ, β(θ) from spin polarized 8Li and 8B; deduced alignment and βα angular correlation terms and contributing matrix elements, weak magnetism term. β-NMR technique. Comparison with conserved vector current (CVC) predictions.

doi: 10.1103/PhysRevC.83.065501
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2006SU13      Phys.Rev. C 74, 024327 (2006)

T.Sumikama, T.Nagatomo, M.Ogura, T.Iwakoshi, Y.Nakashima, H.Fujiwara, K.Matsuta, T.Minamisono, M.Fukuda, M.Mihara

Electric quadrupole moment of the proton halo nucleus 8B

RADIOACTIVITY 8B(β+), (EC) [from 6Li(3He, n)]; measured β-NQR spectrum from oriented source. 8B deduced electric quadrupole moment.

NUCLEAR MOMENTS 8B; measured β-NQR spectrum from oriented source; deduced electric quadrupole moment.

doi: 10.1103/PhysRevC.74.024327
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2005SU25      Eur.Phys.J. A 25, Supplement 1, 709 (2005)

T.Sumikama, T.Iwakoshi, T.Nagatomo, M.Ogura, Y.Nakashima, H.Fujiwara, K.Matsuta, T.Minamisono, M.Mihara, M.Fukuda, K.Minamisono, T.Yamaguchi

Alignment correlation term in mass A = 8 system and G-parity irregular term

RADIOACTIVITY 8B(ECα) [from 6Li(3He, n)]; 8Li(β-α) [from 7Li(d, p)]; measured β-NMR spectra; angular correlations; deduced limit on G-parity term.

doi: 10.1140/epjad/i2005-06-075-3
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2004MA98      Nucl.Phys. A746, 493c (2004)

K.Matsuta, K.Arimura, T.Nagatomo, K.Akutsu, T.Iwakoshi, S.Kudo, M.Ogura, M.Takechi, K.Tanaka, T.Sumikama, K.Minamisono, T.Miyake, T.Minamisono, M.Fukuda, M.Mihara, A.Kitagawa, M.Sasaki, M.Kanazawa, M.Torikoshi, M.Suda, M.Hirai, S.Momota, Y.Nojiri, A.Sakamoto, M.Saihara, T.Ohtsubo, J.R.Alonso, G.F.Krebs, T.J.M.Symons

Magnetic moment of 33Cl

RADIOACTIVITY 33Cl(EC), (β+) [from 32S(d, n)]; measured Iβ(θ, H, t) from polarized source, β-NMR spectrum. 33Cl deduced μ.

doi: 10.1016/j.nuclphysa.2004.09.075
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2004NA37      Nucl.Phys. A746, 505c (2004)

T.Nagatomo, K.Matsuta, K.Akutsu, T.Iwakoshi, Y.Nakashima, T.Sumikama, M.Ogura, M.Mihara, H.Fujiwara, S.Kumashiro, K.Minamisono, T.Minamisono, M.Fukuda, M.Miyake, S.Momota, Y.Nojiri, A.Kitagawa, M.Sasaki, M.Torikoshi, M.Kanazawa, M.Suda, S.Sato, M.Hirai, T.J.M.Symons, G.F.Krebs, J.R.Alonso, S.Y.Zhu, J.Z.Zhu, Y.J.Xu, Y.N.Zheng

Nuclear spin orientation of 12, 13B created in heavy ion collisions

NUCLEAR REACTIONS Be(13C, X)12B, E=100 MeV/nucleon; Be(15N, X)13B, E=100 MeV/nucleon; measured fragment polarization, alignment vs momentum. Comparison with model predictions.

doi: 10.1016/j.nuclphysa.2004.09.078
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2004NA38      Nucl.Phys. A746, 509c (2004)

T.Nagatomo, K.Matsuta, K.Akutsu, T.Iwakoshi, Y.Nakashima, T.Sumikama, M.Ogura, M.Mihara, H.Fujiwara, S.Kumashiro, K.Minamisono, T.Minamisono, M.Fukuda, M.Miyake, S.Momota, Y.Nojiri, A.Kitagawa, M.Sasaki, M.Torikoshi, M.Kanazawa, M.Suda, S.Sato, M.Hirai, T.J.M.Symons, G.F.Krebs, J.R.Alonso, S.Y.Zhu, J.Z.Zhu, Y.J.Xu, Y.N.Zheng

Precise nuclear moments of 13B and the β-ray angular distribution

RADIOACTIVITY 13B(β-) [from 9Be(15N, X)]; measured Iβ(θ, H, t), β-NMR and β-NQR spectra from polarized source. 13B deduced quadrupole moment, μ.

doi: 10.1016/j.nuclphysa.2004.09.079
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2004NA46      Hyperfine Interactions 159, 269 (2004)

T.Nagatomo, T.Sumikama, M.Ogura, K.Matsuta, Y.Nakashima, K.Akutsu, T.Iwakoshi, H.Fujiwara, T.Minamisono, M.Fukuda, M.Mihara, K.Minamisono, T.Miyake, S.Momota, Y.Nojiri, A.Kitagawa, M.Sasaki, M.Torikoshi, M.Kanazawa, M.Suda, M.Hirai, S.Sato, S.Y.Zhu, J.Z.Zhu, Y.J.Xu, Y.N.Zheng, J.R.Alonso, G.F.Krebs, T.M.Symons

Precise Nuclear Quadrupole Moments of 8B and 13B

NUCLEAR REACTIONS 6Li(3He, n)8B, E=4.7 MeV; Be(15N, X)13B, E=100 MeV/nucleon; measured reaction products, Ie, Ee; deduced momentum deviation.

NUCLEAR MOMENTS 8,13B; measured Ie, Ee; deduced β-ray asymmetry, 8,13B ground state quadrupole moment Q and ratios for 8B/12B and 13B/12B. Comparison with OXBASH shell model calculations.

doi: 10.1007/s10751-005-9109-0
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2004NA47      Hyperfine Interactions 159, 273 (2004)

T.Nagatomo, K.Matsuta, Y.Nakashima, T.Sumikama, M.Ogura, K.Akutsu, T.Iwakoshi, H.Fujiwara, T.Minamisono, M.Fukuda, M.Mihara, T.Miyake, K.Minamisono, S.Momota, Y.Nojiri, A.Kitagawa, M.Sasaki, M.Torikoshi, M.Kanazawa, M.Suda, M.Hirai, S.Sato, S.Y.Zhu, J.Z.Zhu, Y.J.Xu, Y.N.Zheng, J.R.Alonso, G.F.Krebs, T.M.Symons

Nuclear Spin Orientation Created in Heavy Ion Collisions and the Sign of the Q Moment of 13B

NUCLEAR REACTIONS Be(15N, X)13B, E=100 MeV/nucleon; measured reaction products, Ie, Ee; deduced β-ray asymmetry.

NUCLEAR MOMENTS 13B; measured Ie, Ee, polarization; deduced quadrupole moment Q sign of 13B ground state. β-NMR technique.

doi: 10.1007/s10751-005-9110-7
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2004SU29      Nucl.Phys. A746, 681c (2004)

T.Sumikama, T.Iwakoshi, T.Nagatomo, M.Ogura, Y.Nakashima, H.Fujiwara, K.Matsuta, T.Minamisono, M.Mihara, M.Fukuda, K.Minamisono, T.Yamaguchi

Beta-ray angular distributions of spin aligned 8Li and 8B

RADIOACTIVITY 8Li, 8B(βα) [from 6Li(3He, n) and 7Li(d, p)]; measured Eβ, βα-coin, angular correlations following decay of polarized source; deduced alignment correlation terms.

doi: 10.1016/j.nuclphysa.2004.09.050
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2003MI24      Nucl.Phys. A721, 477c (2003)

K.Minamisono, K.Matsuta, T.Minamisono, T.Yamaguchi, T.Sumikama, T.Nagatomo, M.Ogura, T.Iwakoshi, M.Mihara, M.Fukuda, K.Koshigiri, M.Morita

G-Parity Irregular Current in the β Decays of the Mass A = 12 System - with the Refined Empirical Value of the Weak Magnetism -

RADIOACTIVITY 12B(β-) [from 11B(d, p)]; 12N(β+) [from 10B(3He, n)]; measured Eβ, angular distributions from spin-aligned sources; deduced G-parity irregular induced tensor coefficient.

doi: 10.1016/S0375-9474(03)01103-5
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2002MI01      Phys.Rev. C65, 015209 (2002)

K.Minamisono, K.Matsuta, T.Minamisono, T.Yamaguchi, T.Sumikama, T.Nagatomo, M.Ogura, T.Iwakoshi, M.Fukuda, M.Mihara, K.Koshigiri

In-Medium Nucleon Mass Renormalization Detected in β Decays of Spin Aligned 12B and 12N

RADIOACTIVITY 12B(β-) [from 11B(d, p)]; 12N(β+) [from 10B(3He, n)]; measured Eβ, angular distributions from spin-aligned sources; deduced axial charge, in-medium mass renormalization.

doi: 10.1103/PhysRevC.65.015209
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2002MI03      Phys.Rev. C65, 015501 (2002)

K.Minamisono, K.Matsuta, T.Minamisono, T.Yamaguchi, T.Sumikama, T.Nagatomo, M.Ogura, T.Iwakoshi, M.Fukuda, M.Mihara, K.Koshigiri, M.Morita

New Limit of the G-Parity Irregular Weak Nucleon Current Detected in β Decays of Spin Aligned 12B and 12N

RADIOACTIVITY 12B(β-) [from 11B(d, p)]; 12N(β+) [from 10B(3He, n)]; measured Eβ, angular distributions from spin-aligned sources; deduced tensor form factor, constraints on Kubodera-Delorme-Rho parameters.

doi: 10.1103/PhysRevC.65.015501
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2002MI36      Z.Naturforsch. 57a, 557 (2002)

K.Minamisono, K.Matsuta, T.Minamisono, T.Yamaguchi, T.Sumikama, T.Nagatomo, M.Ogura, T.Iwakoshi, M.Mihara, M.Fukuda, K.Koshigiri, M.Morita

Spin Manipulation by Use of Nuclear Quadrupole Interactions - Quarks and Medium Effects in the Nucleus

RADIOACTIVITY 12B(β-) [from 11B(d, p)]; 12N(EC) [from 10B(3He, n)]; measured Eβ, Iβ(θ, H, t) from oriented nuclei; deduced alignment correlation terms, axial charge, in-medium nucleon mass renormalization.


2002OG08      Z.Naturforsch. 57a, 599 (2002)

M.Ogura, K.Minamisono, T.Sumikama, T.Nagatomo, T.Iwakoshi, T.Miyake, S.Kudo, K.Akutsu, K.Sato, M.Mihara, M.Fukuda, K.Matsuta, H.Akai, T.Minamisono

Development of a Nuclear Spin Dewar: Hyperfine Interactions of the Short-Lived β Emitter 12B in TiO2

NUCLEAR MOMENTS 12B(β-); measured β-NMR spectra, asymmetry vs temperature for source implanted in TiO2; deduced polarization.


2001OG12      Hyperfine Interactions 136/137, 195 (2001)

M.Ogura, K.Minamisono, T.Sumikama, T.Nagatomo, T.Iwakoshi, T.Miyake, K.Hashimoto, S.Kudo, K.Arimura, M.Ota, K.Akutsu, K.Sato, M.Mihara, M.Fukuda, K.Matsuta, H.Akai, T.Minamisono

A Possible Nuclear Spin Dewar. Hyperfine Interactions of Short-Lived β Emitter 8Li and 12B in TiO2

RADIOACTIVITY 8Li, 12B(β-) [from 7Li, 11B(dp)]; measured β-NMR spectra from oriented sources.

doi: 10.1023/A:1020528231425
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