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NSR database version of April 11, 2024.

Search: Author = K.Asahi

Found 83 matches.

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2023IS02      Phys.Rev. C 107, 024306 (2023)

Y.Ishibashi, A.Gladkov, Y.Ichikawa, A.Takamine, H.Nishibata, T.Sato, H.Yamazaki, T.Abe, J.M.Daugas, T.Egami, T.Fujita, G.Georgiev, K.Imamura, T.Kawaguchi, W.Kobayashi, Y.Nakamura, A.Ozawa, M.Sanjo, N.Shimizu, D.Tominaga, L.C.Tao, K.Asahi, H.Ueno

Nuclear magnetic moment of the neutron-rich nucleus 21O

NUCLEAR MOMENTS 21O; measured Iβ, b(θ), β-NMR spectra; deduced g-factor, J and π of the ground state as 5/2+ based on comparison to single-particle g-factors, configuration, magnetic moment for the 5/2+ ground state. Comparison to shell-model predictions using the USD, YSOX, and SDPF-M interactions and to random phase approximation (RPA) based calculations. Measured with β-ray detected nuclear magnetic resonance (β-NMR) spectroscopy. Spin-polarized 21O beam produced in 9Be(22Ne, X), E=70 MeV/nucleon reaction, followed by separation of 21O fragments using RIPS separator at RIKEN.

doi: 10.1103/PhysRevC.107.024306
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2020BO04      Phys.Rev.Lett. 124, 112501 (2020)

F.Boulay, G.S.Simpson, Y.Ichikawa, S.Kisyov, D.Bucurescu, A.Takamine, D.S.Ahn, K.Asahi, H.Baba, D.L.Balabanski, T.Egami, T.Fujita, N.Fukuda, C.Funayama, T.Furukawa, G.Georgiev, A.Gladkov, M.Hass, K.Imamura, N.Inabe, Y.Ishibashi, T.Kawaguchi, T.Kawamura, W.Kim, Y.Kobayashi, S.Kojima, A.Kusoglu, R.Lozeva, S.Momiyama, I.Mukul, M.Niikura, H.Nishibata, T.Nishizaka, A.Odahara, Y.Ohtomo, D.Ralet, T.Sato, Y.Shimizu, T.Sumikama, H.Suzuki, H.Takeda, L.C.Tao, Y.Togano, D.Tominaga, H.Ueno, H.Yamazaki, X.F.Yang, J.M.Daugas

g Factor of the 99Zr(7/2+) Isomer: Monopole Evolution in the Shape-Coexisting Region

RADIOACTIVITY 99Zr(IT) [from 9Be(238U, X), E=345 MeV/nucleon];measured decay products, Eγ, Iγ; deduced g-ray energies, J, π, level scheme, g-factor using a method of time-differential perturbed angular distribution (TDPAD), T1/2. Comparison with IBFM-1 calculations.

doi: 10.1103/PhysRevLett.124.112501
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2019IC02      Nat.Phys. 15, 321 (2019)

Y.Ichikawa, H.Nishibata, Y.Tsunoda, A.Takamine, K.Imamura, T.Fujita, T.Sato, S.Momiyama, Y.Shimizu, D.S.Ahn, K.Asahi, H.Baba, D.L.Balabanski, F.Boulay, J.M.Daugas, T.Egami, N.Fukuda, C.Funayama, T.Furukawa, G.Georgiev, A.Gladkov, N.Inabe, Y.Ishibashi, T.Kawaguchi, T.Kawamura, Y.Kobayashi, S.Kojima, A.Kusoglu, I.Mukul, M.Niikura, T.Nishizaka, A.Odahara, Y.Ohtomo, T.Otsuka, D.Ralet, G.S.Simpson, T.Sumikama, H.Suzuki, H.Takeda, L.C.Tao, Y.Togano, D.Tominaga, H.Ueno, H.Yamazaki, X.F.Yang

Interplay between nuclear shell evolution and shape deformation revealed by the magnetic moment of 75Cu

NUCLEAR REACTIONS 27Al(76Zn, p)75Cu, E<345 MeV/nucleon; 9Be(238U, X)76Zn, E= 345 MeV/nucleon; measured reaction products, Eγ, Iγ. 75Cu; deduced γ-ray energies, J, π, nuclear magnetic moment. Comparison with theoretical calculations, systematics.

doi: 10.1038/s41567-018-0410-7
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2019SA43      Phys.Rev. A 100, 020502R (2019)

A.Sakurai, B.K.Sahoo, K.Asahi, B.P.Das

Relativistic many-body theory of the electric dipole moment of 129Xe and its implications for probing new physics beyond the standard model

NUCLEAR MOMENTS 129Xe; calculated static dipole polarizability; deduced the time-reversal and parity violating electric dipole moment arising from the nuclear Schiff moment and the electron-nucleus tensor-pseudotensor interaction based on the self-consistent and the normal relativistic coupled-cluster methods.

doi: 10.1103/PhysRevA.100.020502
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2018XU05      Phys.Lett. B 782, 619 (2018)

Z.Y.Xu, H.Heylen, K.Asahi, F.Boulay, J.M.Daugas, R.P.de Groote, W.Gins, O.Kamalou, A.Koszorus, M.Lykiardopoulou, T.J.Mertzimekis, G.Neyens, H.Nishibata, T.Otsuka, R.Orset, A.Poves, T.Sato, C.Stodel, J.C.Thomas, N.Tsunoda, Y.Utsuno, M.Vandebrouck, X.F.Yang

Nuclear moments of the low-lying isomeric 1+ state of 34Al: Investigation on the neutron 1p1h excitation across N=20 in the island of inversion

NUCLEAR MOMENTS 32,34Al; measured transition frequencies using β-NMR/NQR techniques; deduced nuclear g factor and quadrupole moments. Comparison with large-scale shell-model calculations using several effective interactions.

doi: 10.1016/j.physletb.2018.06.009
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2017TE02      Phys.Rev. C 96, 015501 (2017)

E.Teruya, N.Yoshinaga, K.Higashiyama, K.Asahi

Effects of particle-hole excitations to nuclear Schiff moments in Xe isotopes

NUCLEAR MOMENTS 135,133,131,129Xe; calculated nuclear Schiff moments induced by the interaction violating parity and time reversal invariance using shell-model wave functions. Comparison with other theoretical calculations. 129Xe; calculated proton-single-particle energies, strength functions of Schiff moment operator as function of energy, energy weighted sum function for the Schiff moment; estimated upper limit for the electric dipole moment (EDM).

doi: 10.1103/PhysRevC.96.015501
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2017YA10      Eur.Phys.J. A 53, 54 (2017)

N.Yamanaka, B.K.Sahoo, N.Yoshinaga, T.Sato, K.Asahi, B.P.Das

Probing exotic phenomena at the interface of nuclear and particle physics with the electric dipole moments of diamagnetic atoms: A unique window to hadronic and semi-leptonic CP violation

ATOMIC PHYSICS 129Xe, 199Hg, 225Ra; deduced atomic electric dipole moment (relative to the CP-violation coefficient) from LHC and other published data.

doi: 10.1140/epja/i2017-12237-2
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2016KU11      Phys.Rev. C 93, 054313 (2016)

A.Kusoglu, G.Georgiev, C.Sotty, D.L.Balabanski, A.Goasduff, Y.Ishii, Y.Abe, K.Asahi, M.Bostan, R.Chevrier, M.Chikamori, J.M.Daugas, T.Furukawa, H.Nishibata, Y.Ichikawa, Y.Ishibashi, R.Lozeva, H.Miyatake, D.Nagae, T.Nanao, M.Niikura, T.Niwa, S.Okada, A.Ozawa, Y.Saito, H.Shirai, H.Ueno, D.T.Yordanov, N.Yoshida

Magnetic moment of the 13/2+ isomeric state in 69Cu: Spin alignment in the one-nucleon removal reaction

NUCLEAR MOMENTS 69Cu; measured Eγ, Iγ, γγ-, (particle)γ-coin, γ-ray yields, γ(θ), Larmor precession under external magnetic field, time-dependent perturbed angular distribution (TDPAD) method; deduced isomer half-life, magnetic moment, multipolarity, spin alignment in one-nucleon removal reaction at RIKEN facility. 69Cu beam from 9Be(70Zn, X), E=63.13 MeV/nucleon reaction using RIPS separator at RIKEN.

NUCLEAR REACTIONS 9Be(70Zn, X)69Cu, E=63.13 MeV/nucleon; measured Eγ, Iγ, γγ-coin, γ(θ), isomer half-life by γ(t) using RIPS separator at RIKEN. 69Cu; deduced levels, multipolarity, g factor of a level in 69Cu, configurations. Comparison with shell-model calculations using JUN45 and jj4b interactions.

doi: 10.1103/PhysRevC.93.054313
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2014AS03      Physics of Part.and Nuclei 45, 199 (2014)

K.Asahi, Y.Ichikawa, M.Chikamori, Y.Ohtomo, E.Hikota, T.Suzuki, T.Inoue, T.Furukawa, A.Yoshimi, K.Suzuki, T.Nanao, H.Miyatake, M.Tsuchiya, N.Yoshida, H.Shirai, T.Ino, H.Ueno, Y.Matsuo, T.Fukuyama

Search for electric dipole moment in 129Xe atom using a nuclear spin oscillator

ATOMIC PHYSICS 129Xe; analyzed experimental sensitivity for electric dipole moment measurements.

doi: 10.1134/S1063779614010080
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2014YA28      Phys.Rev. A 90, 052516 (2014)

X.Yang, T.Furukawa, T.Wakui, T.Fujita, K.Imamura, Y.Mitsuya, M.Hayasaka, Y.Ichikawa, Y.Ishibashi, H.Shirai, T.Suzuki, Y.Ebara, A.Hatakeyama, M.Wada, T.Sonoda, Y.Ito, T.Kobayashi, S.Nishimura, Mizuki Kurata-Nishimura, Y.Kondo, K.-I.Yoneda, S.Kubono, Y.Ohshiro, H.Ueno, T.Shinozuka, T.Shimoda, K.Asahi, Y.Matsuo

Laser-radio-frequency double-resonance spectroscopy of 84-87Rb isotopes trapped in superfluid helium

NUCLEAR MOMENTS 84,85,86,87Rb; measured laser-radio-frequency double-resonance spectra; deduced nuclear spin values with reasonable accuracy.

doi: 10.1103/PhysRevA.90.052516
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2013IC02      Hyperfine Interactions 220, 47 (2013)

Y.Ichikawa, H.Ueno, Y.Ishii, T.Furukawa, A.Yoshimi, D.Kameda, H.Watanabe, N.Aoi, K.Asahi, D.L.Balabanski, R.Chevrier, J.M.Daugas, N.Fukuda, G.Georgiev, H.Hayashi, H.Iijima, N.Inabe, T.Inoue, M.Ishihara, T.Kubo, T.Nanao, T.Ohnishi, K.Suzuki, M.Tsuchiya, H.Takeda, M.M.Rajabali

Novel method for the production of spin-aligned RI beams in projectile fragmentation reaction with the dispersion matching technique

NUCLEAR REACTIONS 9Be(48Ca, X)33Al, E=345 MeV/nucleon; Al(33Al, X)32Al, E not given; measured reaction products, Eγ, Iγ; deduced spin-aligned radioactive ion beam.

doi: 10.1007/s10751-012-0682-8
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2013IN03      Hyperfine Interactions 220, 59 (2013)

T.Inoue, T.Furukawa, A.Yoshimi, Y.Ichikawa, M.Chikamori, Y.Ohtomo, M.Tsuchiya, N.Yoshida, H.Shirai, M.Uchida, K.Suzuki, T.Nanao, H.Miyatake, H.Ueno, Y.Matsuo, T.Fukuyama, K.Asahi

Nuclear spin maser and experimental search for 129Xe atomic EDM

NUCLEAR MOMENTS 129Xe; measured time-variations of the maser frequency and the cell temperature; deduced sources of systematic errors in electric dipole moment measurements.

doi: 10.1007/s10751-012-0751-z
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2013MA47      Hyperfine Interactions 220, 89 (2013)

K.Matsuta, Y.Masuda, K.Hatanaka, S.C.Jeong, S.Kawasaki, R.Matsumiya, M.Mihara, Y.Watanabe, D.Nishimura, Y.Morita, K.Asahi, T.Adachi, J.Martin, A.Konaka, A.Miller, C.Bidinosti, T.Dawson, L.Lee, C.Davis, D.Ramsay, W.van Oers, E.Korkmaz, L.Buchman

Creation of polarized ultracold neutrons and observation of Ramsey resonance for electric dipole moment measurement

NUCLEAR REACTIONS Pb(p, X)n, E=400 MeV; measured reaction products, En, In, Ramsey resonance spectra; deduced ultra cold neutron yield, spin polarization. Comparison with available data.

doi: 10.1007/s10751-013-0855-0
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2013UE01      Phys.Rev. C 87, 034316 (2013)

H.Ueno, H.Miyatake, Y.Yamamoto, S.Tanimoto, T.Shimoda, N.Aoi, K.Asahi, E.Ideguchi, M.Ishihara, H.Izumi, T.Kishida, T.Kubo, S.Mitsuoka, Y.Mizoi, M.Notani, H.Ogawa, A.Ozawa, M.Sasaki, T.Shirakura, N.Takahashi, K.Yoneda

β-delayed neutron and γ-ray spectroscopy of 17C utilizing spin-polarized 17B

RADIOACTIVITY 17B(β-), (β-n), (β-2n)[spin polarized 17B beam from β-NMR technique in 93Nb(22Ne, X), E=110 MeV/nucleon reaction]; 16,17C, 17N(β-), (β-n)[from 17B decay]; 15C, 16N(β-)[from 17B decay products]; measured Eγ, Iγ, Eβ, Iβ, E(n) by TOF, I(n), β-NMR, βγ-, βγγ-, βnγ-coin at RIKEN facility. 17C; deduced levels, J, π, widths, P(0n), P(1n), P(2n), B(GT). 15,16C, 15,17N; deduced levels. No γ rays observed for delayed-3n and delayed-4n channels of 17B decay, thus P(3n), P(4n) not determined. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.87.034316
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2012CH16      Phys.Rev.Lett. 108, 162501 (2012)

R.Chevrier, J.M.Daugas, L.Gaudefroy, Y.Ichikawa, H.Ueno, M.Hass, H.Haas, S.Cottenier, N.Aoi, K.Asahi, D.L.Balabanski, N.Fukuda, T.Furukawa, G.Georgiev, H.Hayashi, H.Iijima, N.Inabe, T.Inoue, M.Ishihara, Y.Ishii, D.Kameda, T.Kubo, T.Nanao, G.Neyens, T.Ohnishi, M.M.Rajabali, K.Suzuki, H.Takeda, M.Tsuchiya, N.Vermeulen, H.Watanabe, A.Yoshimi

Is the 7/21-1 Isomer State of 43S Spherical?

NUCLEAR MOMENTS 43S; measured isomer deexciting Eγ, Iγ; deduced spectroscopic quadrupole moment. Comparison with SDPF-U interaction shell model calculations.

doi: 10.1103/PhysRevLett.108.162501
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2012IC06      J.Phys.:Conf.Ser. 381, 012090 (2012)

Y.Ichikawa, H.Ueno, Y.Ishii, T.Furukawa, A.Yoshimi, D.Kameda, H.Watanabe, N.Aoi, K.Asahi, D.L.Balabanski, R.Chevrier, J.M.Daugas, N.Fukuda, G.Georgiev, H.Hayashi, H.Iijima, N.Inabe, T.Inoue, M.Ishihara, T.Kubo, T.Nanao, T.Ohnishi, K.Suzuki, M.Tsuchiya, H.Takeda, M.M.Rajabali

Production of spin-aligned RI beam via two-step fragmentation with dispersion matching

doi: 10.1088/1742-6596/381/1/012090
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2012IC07      Nat.Phys. 8, 918 (2012)

Y.Ichikawa, H.Ueno, Y.Ishii, T.Furukawa, A.Yoshimi, D.Kameda, H.Watanabe, N.Aoi, K.Asahi, D.L.Balabanski, R.Chevrier, J.-M.Daugas, N.Fukuda, G.Georgiev, H.Hayashi, H.Iijima, N.Inabe, T.Inoue, M.Ishihara, T.Kubo, T.Nanao, T.Ohnishi, K.Suzuki, M.Tsuchiya, H.Takeda, M.M.Rajabali

Production of spin-controlled rare isotope beams

doi: 10.1038/nphys2457
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2012SH22      Phys.Lett. B 714, 246 (2012)

K.Shimada, H.Ueno, G.Neyens, K.Asahi, D.L.Balabanski, J.M.Daugas, M.Depuydt, M.De Rydt, L.Gaudefroy, S.Grevy, Y.Hasama, Y.Ichikawa, D.Kameda, P.Morel, T.Nagatomo, L.Perrot, Ch.Stodel, J.-C.Thomas, Y.Utsuno, W.Vanderheijden, N.Vermeulen, P.Vingerhoets, E.Yagi, K.Yoshida, A.Yoshimi

Erosion of N = 20 shell in 33Al investigated through the ground-state electric quadrupole moment

NUCLEAR MOMENTS 33Al; measured NMR spectrum; deduced ground state electric quadrupole moment. Comparison with shell model calculations.

doi: 10.1016/j.physletb.2012.07.030
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2012YO03      Hyperfine Interactions 204, 133 (2012)

Y.Yoshida, K.Suzuki, Y.Kobayashi, T.Nagatomo, Y.Akiyama, K.Yukihira, K.Hayakawa, H.Ueno, A.Yoshimi, D.Nagae, K.Asahi, G.Langouche

57Fe charge states in MC-Si solar cells under light illumination after GeV-implantation of 57Mn

RADIOACTIVITY 57Mn(β-) [from Be(58Fe, X), E=63 MeV/nucleon]; measured decay products, Eγ, Iγ, X-rays; deduced Mossbauer spectra, impurities trapping.

doi: 10.1007/s10751-011-0424-3
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2010MI30      Hyperfine Interactions 197, 143 (2010)

M.Mihara, T.Izumikawa, H.Ueno, K.Matsuta, D.Nishimura, T.Nagatomo, T.Moriguchi, Y.Ito, D.Nagae, M.Fukuda, A.Yoshimi, K.Yamada, M.Takechi, Y.Ichikawa, S.Momota, Y.Hirayama, T.Ohtsubo, S.Suzuki, T.Kubo, Y.Namiki, A.Ozawa, Y.Ishibashi, H.Oishi, K.Suzuki, I.Hachiuma, K.Namihira, D.Horikawa, T.Minamisono, T.Yamaguchi, T.Kuboki, T.Suzuki, K.Satoh, Y.Kobayashi, K.Asahi, K.Matsukawa, K.Shirai

Beta-NMR measurement of 58Cu in Si

RADIOACTIVITY 58Cu(EC)(β+); measured polarization in magnetic field, β-NMR; deduced μ.

doi: 10.1007/s10751-010-0249-5
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2009AS05      Int.J.Mod.Phys. E18, 2020 (2009)

K.Asahi, K.Shimada, K.Kameda, D.Nagae, M.Uchida, K.Suzuki, T.Inoue, N.Hatakeyama, S.Kagami, Y.Hasama, H.Ueno, H.Yoshimi, T.Nagatomo, T.Sugimoto, M.Ishihara, J.Murata, H.Kawamura, K.Narita

Study of neutron-rich nuclei through static electromagnetic moments

doi: 10.1142/S0218301309014214
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2009DE25      Phys.Lett. B 678, 344 (2009)

M.De Rydt, G.Neyens, K.Asahi, D.L.Balabanski, J.M.Daugas, M.Depuydt, L.Gaudefroy, S.Grevy, Y.Hasama, Y.Ichikawa, P.Morel, T.Nagatomo, T.Otsuka, L.Perrot, K.Shimada, C.Stodel, J.C.Thomas, H.Ueno, Y.Utsuno, W.Vanderheijden, N.Vermeulen, P.Vingerhoets, A.Yoshimi

Precision measurement of the electric quadrupole moment of 31Al and determination of the effective proton charge in the sd-shell

RADIOACTIVITY 31Al(β-); measured electric quadrupole coupling constant; deduced quadrupole moment, proton effective charge using two β-NQR techniques. Comparison with shell model. Quadrupole systematics in nearby nuclei discussed.

doi: 10.1016/j.physletb.2009.06.043
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2009NA03      Phys.Rev. C 79, 027301 (2009)

D.Nagae, H.Ueno, D.Kameda, M.Takemura, K.Asahi, K.Takase, A.Yoshimi, T.Sugimoto, K.Shimada, T.Nagatomo, M.Uchida, T.Arai, T.Inoue, S.Kagami, N.Hatakeyama, H.Kawamura, K.Narita, J.Murata

Ground-state electric quadrupole moment of 31Al

NUCLEAR REACTIONS 93Nb(40Ar, X)31Al, E=95 MeV/nucleon; measured ground state electric quadrupole moment for a spin polarized 31Al beam using β-NQR spectroscopy.

NUCLEAR MOMENTS 31Al; measured ground state electric quadrupole moments using the β-NQR method.

doi: 10.1103/PhysRevC.79.027301
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2009NA41      Eur.Phys.J. A 42, 383 (2009)

T.Nagatomo, K.Shimada, K.Asahi, D.L.Balabanski, J.M.Daugas, M.Depuydt, M.De Rydt, L.Gaudefroy, S.Grevy, Y.Hasama, Y.Ichikawa, D.Kameda, P.Morel, L.Perrot, C.Stodel, J.C.Thomas, W.Vanderheijden, N.Vermeulen, P.Vingerhoets, A.Yoshimi, G.Neyens, H.Ueno

Electric quadrupole moment of the neutron-rich 33Al

RADIOACTIVITY 33Al(β-)[from Be(36S, X), E=77.5 MeV/nucleon]; measured β-NQR spectra from polarized 33Al nuclei. LISE spectrometer at GANIL.

NUCLEAR MOMENTS 33Al; measured electric quadrupole moment by β-ray detected nuclear quadrupole resonance (β-NQR) method. Relevance to 'Island of Inversion'. Polarized 33Al nuclei.

doi: 10.1140/epja/i2009-10885-3
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2008NA28      Nucl.Instrum.Methods Phys.Res. B266, 4612 (2008)

D.Nagae, H.Ueno, D.Kameda, M.Takemura, K.Asahi, K.Takase, A.Yoshimi, T.Sugimoto, K.Shimada, T.Nagatomo, M.Uchida, T.Arai, T.Inoue, S.Kagami, N.Hatakeyama, J.Murata, H.Kawamura, K.Narita

Electric quadrupole moment of 31Al

NUCLEAR REACTIONS 93Nb(40Ar, X)31Al, E=95 MeV/nucleon; measured ground state electric quadrupole moment for a spin polarized 31Al beam using β-NQR spectroscopy using RIPS at RIKEN facility.

NUCLEAR MOMENTS 31Al; measured ground state electric quadrupole moments using the β-NQR method.

doi: 10.1016/j.nimb.2008.05.111
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2007KA18      Phys.Lett. B 647, 93 (2007)

D.Kameda, H.Ueno, K.Asahi, M.Takemura, A.Yoshimi, T.Haseyama, M.Uchida, K.Shimada, D.Nagae, G.Kijima, T.Arai, K.Takase, S.Suda, T.Inoue, J.Murata, H.Kawamura, Y.Kobayashi, H.Watanabe, M.Ishihara

Measurement of the electric quadrupole moment of 32Al

RADIOACTIVITY 32Al(β-) [from 40Ar fragmentation]; measured β-NMR spectra. 32Al deduced quadrupole moment.

doi: 10.1016/j.physletb.2007.01.063
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2007KA68      Hyperfine Interactions 180, 61 (2007)

D.Kameda, H.Ueno, K.Asahi, D.Nagae, M.Takemura, K.Shimada, A.Yoshimi, T.Nagatomo, T.Sugimoto, M.Uchida, T.Arai, K.Takase, S.Suda, T.Inoue, J.Murata, H.Kawamura, H.Watanabe, Y.Kobayashi, M.Ishihara

Electric quadrupole moments of neutron-rich nuclei 32Al and 31Al

NUCLEAR MOMENTS 32,31Al(β-); measured ground state electric quadrupole moments using the β-NQR method.

doi: 10.1007/s10751-008-9685-x
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2007SA25      J.Radioanal.Nucl.Chem. 272, 665 (2007)

W.Sato, H.Ueno, A.Taniguchi, Y.Itsuki, Y.Kasamatsu, A.Shinohara, K.Asahi, Y.Ohkubo

Time-dependent quadrupole interactions for 140Ce ions implanted in highly oriented pyrolytic graphite

RADIOACTIVITY 140Ce(β-); measured Eγ, Iγ, angular anisotropy for source implanted in highly oriented pyrolytic graphite. Time-differential perturbed angular correlation.

doi: 10.1007/s10967-007-0643-x
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2007SH50      Hyperfine Interactions 180, 43 (2007)

K.Shimada, D.Nagae, K.Asahi, T.Inoue, K.Takase, S.Kagami, N.Hatakeyama, Y.Kobayashi, H.Ueno, A.Yoshimi, D.Kameda, T.Nagatomo, T.Sugimoto, S.Kubono, H.Yamaguchi, Y.Wakabayashi, G.Amadio, S.Hayakawa, J.Murata, H.Kawamura

Production of spin-polarized 17N beam using inverse-kinematics low-energy transfer reactions

doi: 10.1007/s10751-008-9626-8
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2007UE02      Eur.Phys.J. Special Topics 150, 185 (2007)

H.Ueno, D.Kameda, D.Nagae, M.Takemura, K.Asahi, K.Shimada, K.Takase, T.Sugimoto, T.Nagatomo, M.Uchida, T.Arai, T.Inoue, A.Yoshimi, T.Kawamura, K.Narita

Nuclear moments of neutron-rich aluminum isotopes

RADIOACTIVITY 30,31,32Al(β-); measured magnetic dipole and electric quadrupole moments using the β-NMR method.

doi: 10.1140/epjst/e2007-00299-y
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2005UE01      Phys.Lett. B 615, 186 (2005)

H.Ueno, D.Kameda, G.Kijima, K.Asahi, A.Yoshimi, H.Miyoshi, K.Shimada, G.Kato, D.Nagae, S.Emori, T.Haseyama, H.Watanabe, M.Tsukui

Magnetic moments of 3013Al17 and 3213Al19

RADIOACTIVITY 30,32Al(β-) [from 40Ar fragmentation]; measured β-NMR spectra, T1/2; deduced μ.

NUCLEAR MOMENTS 30,32Al; measured β-NMR spectra; deduced μ.

doi: 10.1016/j.physletb.2005.04.037
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2004KA22      Nucl.Phys. A734, 481 (2004)

D.Kameda, K.Asahi, H.Ueno, A.Yoshimi, H.Watanabe, H.Miyoshi, K.Shimada, J.Murata, Y.Kobayashi, G.Kato, S.Emori, W.Sato, H.Ogawa

Recent result from the nuclear moment measurements using a spin polarized radioactive beam

RADIOACTIVITY 19N(β-) [from C(22Ne, X)]; measured β-NMR spectra from oriented nuclei; deduced ground-state g factor.

doi: 10.1016/j.nuclphysa.2004.01.090
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2004UE03      Nucl.Phys. A738, 211 (2004)

H.Ueno, K.Asahi, H.Ogawa, D.Kameda, H.Miyoshi, A.Yoshimi, H.Watanabe, K.Shimada, W.Sato, K.Yoneda, N.Imai, Y.Kobayashi, M.Ishihara, W.-D.Schmidt-Ott

Measurement of nuclear moments in the region of light neutron-rich nuclei

NUCLEAR MOMENTS 17C, 17,19N; measured μ. 17C deduced ground-state J, π. 11,13,15,17B; measured electric quadrupole moments.

doi: 10.1016/j.nuclphysa.2004.04.033
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2004WA05      Eur.Phys.J. A 19, 163 (2004)

H.Watanabe, Y.Wakabayashi, Y.Gono, T.Fukuchi, H.Ueno, W.Sato, A.Yoshimi, D.Kameda, H.Miyoshi, T.Kishida, Y.Kobayashi, T.Morikawa, S.Motomura, O.Kashiyama, K.Saito, A.Odahara, K.Asahi

Lifetime of a new high-spin isomer in 150Dy

NUCLEAR REACTIONS 141Pr(16O, 6np), E=165 MeV; measured Eγ, Iγ, γγ-coin, DSA. Mg(132Xe, X)150Dy, E=7 MeV/nucleon; measured prompt and delayed Eγ, Iγ, γγ-coin. 150Dy deduced high-spin levels, J, π, high-spin isomer T1/2. Recoil shadow and centroid shift techniques.

doi: 10.1140/epja/i2003-10150-y
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2004WA33      Nucl.Phys. A746, 540c (2004)

H.Watanabe, K.Asahi, T.Kishida, H.Ueno, W.Sato, A.Yoshimi, Y.Kobayashi, D.Kameda, H.Miyoshi, T.Fukuchi, Y.Wakabayashi, T.Sasaki, M.Kibe, N.Hokoiwa, A.Odahara, B.Cederwall, K.Lagergren, Zs.Podolyak, M.Ishihara, Y.Gono

Application of the high-spin isomer beams to the secondary fusion reaction and the measurement of g-factor

NUCLEAR REACTIONS 12C(145Sm, 3n), E ≈ 5.5 MeV/nucleon; measured Eγ, Iγ. Mg(132Xe, X)149mDy, E not given; measured Eγ, Iγ(θ, H, t). 149Dy deduced g factor for high-spin isomer.

doi: 10.1016/j.nuclphysa.2004.09.141
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2004YO07      Nucl.Phys. A738, 519 (2004)

A.Yoshimi, H.Ueno, W.Sato, H.Watanabe, Y.Kobayashi, J.Murata, H.Miyoshi, K.Shimada, K.Asahi

Study on the transient field at very high velocities for the g-factor measurement of excited states in unstable nuclei

NUCLEAR REACTIONS 197Au, Gd(22Ne, 22Ne'), E=4.9 MeV/nucleon; measured Eγ, Iγ(θ, H, t), (particle)γ-coin; deduced transient magnetic field strength in Gd target layer.

doi: 10.1016/j.nuclphysa.2004.04.101
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2003MI01      Phys.Rev. C 67, 014306 (2003)

H.Miyatake, H.Ueno, Y.Yamamoto, N.Aoi, K.Asahi, E.Ideguchi, M.Ishihara, H.Izumi, T.Kishida, T.Kishida, T.Kubo, S.Mitsuoka, Y.Mizoi, M.Notani, H.Ogawa, A.Ozawa, M.Sasaki, T.Shimoda, T.Shirakura, N.Takahashi, S.Tanimoto, K.Yoneda

Spin-parity assignments in 15C* by a new method: β-delayed spectroscopy for a spin-polarized nucleus

RADIOACTIVITY 15B, 17N(β-n) [from 9Be(22Ne, X)]; measured β asymmetry, β-delayed neutron spectra from spin-polarized source. 15C levels deduced J, π. β-NMR technique.

doi: 10.1103/PhysRevC.67.014306
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2003OG03      Phys.Rev. C 67, 064308 (2003)

H.Ogawa, K.Asahi, K.Sakai, T.Suzuki, H.Izumi, H.Miyoshi, M.Nagakura, K.Yogo, A.Goto, T.Suga, T.Honda, H.Ueno, Y.X.Watanabe, K.Yoneda, A.Yoshimi, N.Fukuda, Y.Kobayashi, A.Yoshida, T.Kubo, M.Ishihara, N.Imai, N.Aoi, W.-D.Schmidt-Ott, G.Neyens, S.Teughels

Electric quadrupole moment of 17B and anomalous E2 effective charges for neutron-rich nuclei

RADIOACTIVITY 17B(β-) [from 93Nb(22Ne, X)]; measured β-NMR spectra from polarized source. 17B deduced quadrupole moment. Comparison with shell-model predictions.

doi: 10.1103/PhysRevC.67.064308
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2003SA04      J.Radioanal.Nucl.Chem. 255, 183 (2003)

W.Sato, H.Ueno, H.Watanabe, H.Ogawa, H.Miyoshi, N.Imai, A.Yoshimi, K.Yoneda, D.Kameda, Y.Kobayashi, K.Asahi

On-line TDPAC studies with the 19O beam

RADIOACTIVITY 19O(β-) [from Be(22Ne, X)]; measured Eγ, Iγ(θ, H, t), γγ-coin. 19F transitions deduced angular correlation coefficients for different implantation media.

doi: 10.1023/A:1022216806445
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2003WA28      Nucl.Phys. A728, 365 (2003)

H.Watanabe, H.Ueno, D.Kameda, W.Sato, A.Yoshimi, H.Miyoshi, T.Kishida, Y.Kobayashi, A.Odahara, Y.Gono, K.Asahi

g-Factor of the high-spin isomer in 149Dy and a multi-quasiparticle configuration caused by the N = 82 core excitations

NUCLEAR REACTIONS Mg(132Xe, xn)149Dy, E=7.0 MeV/nucleon; measured delayed Eγ, Iγ(θ, H, t). 149Dy deduced g factor of high-spin isomer. Time-differential perturbed angular distribution method, deformed independent particle model analysis.

doi: 10.1016/j.nuclphysa.2003.09.007
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2002AS06      Nucl.Phys. A704, 88c (2002)

K.Asahi, K.Sakai, H.Ogawa, H.Miyoshi, K.Yogo, A.Goto, T.Suga, H.Ueno, Y.Kobayashi, A.Yoshimi, A.Yoshida, T.Kubo, Y.X.Watanabe, H.Imai, K.Yoneda, N.Fukuda, N.Aoi, M.Ishihara, W.-D.Schmidt-Ott, G.Neyens, S.Teughels

Electromagnetic Moments of Neutron-Rich Nuclei Measured with Polarized Radioactive Ion Beams

NUCLEAR MOMENTS 15C, 17,18N; measured β-NMR spectra of oriented nuclei; deduced μ.

doi: 10.1016/S0375-9474(02)00769-8
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2002HA23      Phys.Lett. 534B, 39 (2002)

T.Haseyama, K.Asahi, J.D.Bowman, P.P.J.Delheij, H.Funahashi, S.Ishimoto, G.Jones, A.Masaike, Y.Masuda, Y.Matsuda, K.Morimoto, S.Muto, S.I.Penttila, V.R.Pomeroy, K.Sakai, E.I.Sharapov, D.A.Smith, V.W.Yuan

Measurement of Parity-Nonconserving Rotation of Neutron Spin in the 0.734-eV p-Wave Resonance of 139La

NUCLEAR REACTIONS 139La(polarized n, n), E ≈ 0.5-1 eV; measured neutron polarization, spin rotation angle; deduced parity-nonconserving effect. Comparison with previous results, model predictions.

doi: 10.1016/S0370-2693(02)01720-3
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2002KO15      Eur.Phys.J. A 13, 243 (2002)

Y.Kobayashi, Y.Yoshida, M.K.Kubo, Y.Yamada, A.Yoshida, H.Ogawa, H.Ueno, K.Asahi

In-Beam Mossbauer Study of 57Fe using a Secondary 57Mn Beam and Ion Implantation

NUCLEAR REACTIONS 57Fe(γ, γ'), E=14.4 keV; measured Mossbauer spectra. Target and source implanted in Si.

doi: 10.1007/s10050-002-8750-0
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2002OG02      Eur.Phys.J. A 13, 81 (2002)

H.Ogawa, K.Asahi, H.Ueno, K.Sakai, H.Miyoshi, D.Kameda, T.Suzuki, H.Izumi, N.Imai, Y.X.Watanabe, K.Yoneda, N.Fukuda, H.Watanabe, A.Yoshimi, W.Sato, N.Aoi, M.Nagakura, T.Suga, K.Yogo, A.Goto, T.Honda, Y.Kobayashi, W.-D.Schmidt-Ott, G.Neyens, S.Teughels, A.Yoshida, T.Kubo, M.Ishihara

Quenching of Neutron E2 Effective Charge in Neutron-Rich Nuclei and the Ground-State Spin-Parity of 17C

RADIOACTIVITY 17B, 17C(β-) [from 93Nb(22Ne, X)]; measured β-NMR spectra from polarized nuclei. 17B deduced quadrupole moment. 17C deduced g-factor, ground-state J, π. Quenching of core polarization discussed.

doi: 10.1007/s10050-002-8723-3
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2002OG14      Prog.Theor.Phys.(Kyoto), Suppl. 146, 607 (2002)

H.Ogawa, K.Asahi, H.Ueno, H.Miyoshi, D.Kameda, N.Imai, K.Yoneda, H.Watanabe, T.Suga, K.Ohno, A.Yoshimi, W.Sato, K.Sakai, K.Yogo, Y.Kobayashi, A.Yoshida, T.Kubo, M.Ishihara

Assignment of the Ground-State Spin-Parity for 17C through g-Factor Measurement

RADIOACTIVITY 17C(β-) [from 93Nb(22Ne, X)]; measured β-NMR spectra from polarized nuclei. 17C deduced g-factor, ground-state J, π.

doi: 10.1143/PTPS.146.607
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2001AS03      Prog.Part.Nucl.Phys. 46, 321 (2001)

K.Asahi

RIKEN Radioactive Beam Facility and Polarized Radioactive Beams

doi: 10.1016/S0146-6410(01)00139-9
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2001AS04      Nucl.Phys. A693, 63 (2001)

K.Asahi, K.Matsuta

Nuclear Electromagnetic Moments. β-NMR and Its Applications

doi: 10.1016/S0375-9474(01)00361-X
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2001AS07      Hyperfine Interactions 136/137, 183 (2001)

K.Asahi, H.Ogawa, H.Ueno, Y.Kobayashi, W.Sato, A.Yoshimi, H.Watanabe, D.Kameda, H.Miyoshi, K.Sakai, N.Imai, K.Yoneda, Y.X.Watanabe, N.Fukuda, N.Aoi, A.Yoshida, T.Kubo, M.Ishihara

Nuclear Moment Studies with Polarized Radioactive Nuclear Beams

RADIOACTIVITY 17C(β-) [from 93Nb(22Ne, X)]; measured β-NMR spectrum from oriented source. 17C deduced ground-state g factor.

doi: 10.1023/A:1020536116462
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2001SA24      Phys.Rev. C63, 064310 (2001)

H.Sagawa, K.Asahi

N/Z Dependence of Core Polarization Charges and Quadrupole Moments of B Isotopes

NUCLEAR STRUCTURE 12,16,20C; calculated quadrupole response functions, polarization charges. 10,11,12,13,14,15,17B; calculated quadrupole moments. Comparisons with data.

doi: 10.1103/PhysRevC.63.064310
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1999OG03      Phys.Lett. 451B, 11 (1999)

H.Ogawa, K.Asahi, K.Sakai, A.Yoshimi, M.Tsuda, Y.Uchiyama, T.Suzuki, K.Suzuki, N.Kurokawa, M.Adachi, H.Izumi, H.Ueno, T.Shimoda, S.Tanimoto, N.Takahashi, W.-D.Schmidt-Ott, M.Schafer, S.Fukuda, A.Yoshida, M.Notani, T.Kubo, H.Okuno, H.Sato, N.Aoi, K.Yoneda, H.Iwasaki, N.Fukuda, N.Fukunishi, M.Ishihara, H.Miyatake

Magnetic Moment and Electric Quadrupole Moment of the 18N Ground State

RADIOACTIVITY 18N(β-) [from 22Ne fragmentation]; measured β-NMR. 18Ne deduced μ, quadrupole moment.

NUCLEAR REACTIONS 12C(22Ne, X)18N, E=110 MeV/nucleon; measured fragment polarization.

doi: 10.1016/S0370-2693(99)00219-1
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1998OG04      J.Phys.(London) G24, 1399 (1998)

H.Ogawa, K.Asahi, K.Sakai, A.Yoshimi, M.Tsuda, Y.Uchiyama, T.Suzuki, K.Suzuki, N.Kurokawa, M.Adachi, H.Izumi, H.Ueno, T.Shimoda, S.Tanimoto, N.Takahashi, W.-D.Schmidt-Ott, M.Schafer, S.Fukuda, A.Yoshida, M.Notani, T.Kubo, H.Okuno, H.Sato, N.Aoi, K.Yoneda, H.Iwasaki, N.Fukuda, N.Fukunishi, M.Ishihara

Static Moments of the 18N Ground State

RADIOACTIVITY 18N(β-) [from 22Ne primary beam fragmentation]; measured Iβ(H, t). 18N deduced ground-state Q, μ. β-NMR technique.


1998SC19      Phys.Rev. C57, 2205 (1998)

M.Schafer, W.-D.Schmidt-Ott, T.Dorfler, T.Hild, T.Pfeiffer, R.Collatz, H.Geissel, M.Hellstrom, Z.Hu, H.Irnich, N.Iwasa, M.Pfutzner, E.Roeckl, M.Shibata, B.Pfeiffer, K.Asahi, H.Izumi, H.Ogawa, H.Sato, H.Ueno, H.Okuno

Polarization in Fragmentation, g Factor of 35K

NUCLEAR REACTIONS 9Be(40Ca, X)39Ca/35K/37K, E=500 MeV/nucleon; measured fragments beta asymmetry; deduced polarization. 35K deduced g factor. Projectile fragment separator.

RADIOACTIVITY 35K(β+) [from 9Be(40Ca, X)]; measured T1/2. Projectile fragment separator.

doi: 10.1103/PhysRevC.57.2205
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1997SA05      Phys.Lett. 391B, 11 (1997)

K.Sakai, Y.Masuda, T.Adachi, K.Asahi, M.Doi, M.Harada, S.Ishimoto, M.Iinuma, J.Kura, A.Masaike, Y.Matsuda, K.Morimoto, S.Muto, K.Okumura, H.Sato, H.M.Shimizu, A.Yoshimi, Z.J.Zheng

Observation of Parity-Violating Neutron Spin Rotation in the n-139La p-Wave Resonance

NUCLEAR REACTIONS 139La(polarized n, n), E=0.5-1 eV; measured parity-violating spin rotation angle near p-wave resonance; deduced parity mixing matrix element.

doi: 10.1016/S0370-2693(96)01447-5
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1996IZ01      Phys.Lett. 366B, 51 (1996)

H.Izumi, K.Asahi, H.Ueno, H.Okuno, H.Sato, K.Nagata, Y.Hori, M.Adachi, N.Aoi, A.Yoshida, G.Liu, N.Fukunishi, M.Ishihara

Electric Quadrupole Moments of Neutron-Rich Nuclei 14B and 15B

RADIOACTIVITY 14,15B(β-) [from 93Nb(18O, X), E=64.7 MeV/nucleon]; measured β-NMR, polarized nuclei; deduced electric quadrupole moments. Shell model comparison.

doi: 10.1016/0370-2693(95)01312-1
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1996IZ02      Hyperfine Interactions 97/98, 509 (1996)

H.Izumi, K.Asahi, H.Ueno, H.Okuno, H.Sato, K.Nagata, Y.Hori, M.Adachi, N.Aoi, A.Yoshida, G.Liu, N.Fukunishi, M.Ishihara

Measurement of Electric Quadrupole Moments of Neutron-Rich Nuclei 14B and 15B

RADIOACTIVITY 12,14,15B(β-) [from 93Nb(18O, X), E=64.7 MeV/nucleon]; measured β-NMR, polarized sources. 17N, 17,14,15B deduced electric quadrupole moments. Other data input.

doi: 10.1007/BF02150193
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1996LI67      High Energy Phys. and Nucl.Phys. (China) 20, 778 (1996)

G.Liu, K.Asahi, H.Izumi, H.Ueno, H.Okuno, H.Sato, K.Nagata, Y.Hori, M.Adechi, N.Aoi, A.Yoshida, N.Fukunishi, M.Ishihara

Measurements of Electric Quadrupole Moments of Neutron-Rich Nuclei 14B and 15B


1996TA12      Hyperfine Interactions 97/98, 469 (1996)

N.Takahashi, T.Shimoda, H.Miyatake, S.Mitsuoka, Y.Mizoi, H.Kobayashi, M.Sasaki, T.Shirakura, H.Ueno, K.Asahi, S.Morinobu

Freezing-Out of Nuclear Polarization in Radioactive Core Ions of Microclusters, ' Snowballs ' in Superfluid Helium

NUCLEAR MOMENTS 12B(β-); measured β asymmetry; deduced source polarization related features. Spin polarized 12B introduced into superfluid helium.

doi: 10.1007/BF02150190
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1996UE02      Phys.Rev. C53, 2142 (1996)

H.Ueno, K.Asahi, H.Izumi, K.Nagata, H.Ogawa, A.Yoshimi, H.Sato, M.Adachi, Y.Hori, K.Mochinaga, H.Okuno, N.Aoi, M.Ishihara, A.Yoshida, G.Liu, T.Kubo, N.Fukunishi, T.Shimoda, H.Miyatake, M.Sasaki, T.Shirakura, N.Takahashi, S.Mitsuoka, W.-D.Schmidt-Ott

Magnetic Moments of 17N and 17B

RADIOACTIVITY 17N(β-) [from 93Nb(18O, X), E=64.7 MeV/nucleon]; 17B(β-) [from 93Nb(22Ne, X), E=94.4 MeV/nucleon]; measured NMR; deduced μ. Model comparison.

NUCLEAR STRUCTURE 17N, 17B, 19F; calculated μ. 16,18O; calculated levels. Model comparison.

doi: 10.1103/PhysRevC.53.2142
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1995AS05      Nucl.Phys. A588, 135c (1995)

K.Asahi, H.Ueno, H.Izumi, H.Okuno, K.Nagata, H.Ogawa, Y.Hori, H.Sato, K.Mochinaga, M.Adachi, A.Yoshida, G.Liu, N.Aoi, T.Kubo, M.Ishihara, W.-D.Schmidt-Ott, T.Shimoda, H.Miyatake, S.Mitsuoka, N.Takahashi

Electromagnetic Moments of Unstable Nuclei Studied with Polarized Projectile Fragments

NUCLEAR REACTIONS 197Au(14N, X), E=39.4 MeV/nucleon; 197Au(15N, X), E=68, 109.6 MeV/nucleon; 93Nb(93Nb, X), E=67.3 MeV/nucleon; 27Al(15N, X), E=68 MeV/nucleon; measured ejectile yield, spin polarization spectra vs (p-p0)/p0.

doi: 10.1016/0375-9474(95)00112-E
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1995OK04      Phys.Lett. 354B, 41 (1995)

H.Okuno, K.Asahi, H.Ueno, H.Izumi, H.Sato, M.Adachi, T.Nakamura, T.Kubo, N.Inabe, A.Yoshida, N.Fukunishi, T.Shimoda, H.Miyatake, N.Takahashi, W.-D.Schmidt-Ott, M.Ishihara

Measurement of the Magnetic Moments of 14B and 15B using Projectile Fragmentation Spin Polarization

RADIOACTIVITY 12,14,15B(β-) [from 93Nb(18O, X), E=68 MeV/nucleon]; measured β NMR; deduced μ. Polarized nuclei. Model comparison.

doi: 10.1016/0370-2693(95)00630-4
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1995SH22      Nucl.Phys. A588, 235c (1995)

T.Shimoda, H.Miyatake, S.Mitsuoka, Y.Mizoi, H.Kobayashi, M.Sasaki, T.Shirakura, H.Ueno, H.Izumi, K.Asahi, T.Murakami, S.Morinobu, N.Takahashi

Preservation of Nuclear Spin Polarization of 12B in Superfluid Helium

RADIOACTIVITY 8Li(β-); 12B(β-) [from 9Be(14N, X), E=38.5 MeV/nucleon]; measured β-ray counting rates, β-NMR; deduced 12B spin polarization preservation during T1/2 duration. Source implantation into superfluid helium, ' snowball ' aggregates of He atoms.

doi: 10.1016/0375-9474(95)00145-Q
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1994AD10      Nucl.Phys. A577, 433c (1994)

T.Adachi, K.Asahi, M.Doi, M.Harada, M.Iinuma, S.Ishimoto, T.Maekawa, A.Masaike, Y.Masuda, Y.Matsuda, K.Morimoto, K.Okumura, K.Sakai, H.Sato, H.M.Shimizu, Y.Takahashi, R.Takizawa, T.Yabuzaki, Z.J.Zheng

Test of Parity Violation and Time Reversal Invariance in Slow Neutron Absorption Reactions

NUCLEAR REACTIONS 139La, 111Cd, 81Br(polarized n, γ), E=slow; compiled, reviewed data; deduced weak interaction matrix element.

doi: 10.1016/0375-9474(94)90893-1
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1994MA53      Hyperfine Interactions 84, 337 (1994)

Y.Masuda, T.Adachi, K.Asahi, M.Doi, M.Iinuma, S.Ishimoto, A.Masaike, Y.Matsuda, K.Morimoto, Y.Mori, K.Sakai, H.Sato, H.M.Shimizu, Z.Z.Jian

Neutron Polarization for P- and T-Violation Experiments

NUCLEAR REACTIONS 139La(polarized n, γ), E=0.4-1.1 eV; compiled, reviewed capture γ-yield, asymmetry data. 81Br, 111Cd, 93Nb, 108Pd, 124Sn(polarized n, γ), E ≈ resonance; compiled, reviewed longitudinal asymmetry data.

doi: 10.1007/BF02060681
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1994OK03      Phys.Lett. 335B, 29 (1994)

H.Okuno, K.Asahi, H.Sato, H.Ueno, J.Kura, M.Adachi, T.Nakamura, T.Kubo, N.Inabe, A.Yoshida, T.Ichihara, Y.Kobayashi, Y.Ohkubo, M.Iwamoto, F.Ambe, T.Shimoda, H.Miyatake, N.Takahashi, J.Nakamura, D.Beaumel, D.J.Morrissey, W.-D.Schmidt-Ott, M.Ishihara

Systematic Behavior of Ejectile Spin Polarization in the Projectile Fragmentation Reaction

NUCLEAR REACTIONS 197Au, 93Nb, 27Al(15N, X), E=70-112 MeV/nucleon; 197Au(14N, X), E=39.4 MeV/nucleon; measured ejectile(12,13B) spin polarization; deduced role of new reaction mechanism.

doi: 10.1016/0370-2693(94)91553-9
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1994SA56      Hyperfine Interactions 84, 205 (1994)

H.Sato, Y.Masuda, K.Sakai, M.Doi, K.Asahi, Z.J.Zheng, Y.Mori, P.P.J.Delheij, Y.Matsuda, M.Iinuma, H.M.Shimizu, A.Masaike

Polarized 3He System for T- and P-Violation Neutron Experiments

NUCLEAR REACTIONS 3He(polarized n, X), E not given; measured target polarization from neutron transmission. Target polarized by optical pumping.

doi: 10.1007/BF02060665
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1994SC40      Z.Phys. A350, 215 (1994)

W.-D.Schmidt-Ott, K.Asahi, Y.Fujita, H.Geissel, K.-D.Gross, T.Hild, H.Irnich, M.Ishihara, K.Krumbholz, V.Kunze, A.Magel, F.Meissner, K.Muto, F.Nickel, H.Okuno, M.Pfutzner, C.Scheidenberger, K.Suzuki, M.Weber, C.Wennemann

Spin Alignment of 43Sc Produced in the Fragmentation of 500 MeV/u 46Ti

NUCLEAR REACTIONS 9Be(46Ti, X), E=500 MeV/nucleon; measured γ(θ, H, t). 43mSc deduced spin alignment. Projectile fragmentation.

doi: 10.1007/BF01289585
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1994UE04      Hyperfine Interactions 84, 371 (1994)

H.Ueno, H.Okuno, K.Asahi, H.Sato, T.Kubo, T.Nakamura, N.Inabe, A.Yoshida, Y.Ohkubo, M.Adachi, T.Ichihara, M.Ishihara, T.Shimoda, H.Miyatake, N.Takahashi, W.-D.Schmidt-Ott

Spin-Polarized Radioactive Beams and β-NMR Experiments

RADIOACTIVITY 14,15B, 21F(β-) [from 197Au(14N, X), E=40.6 MeV/nucleon; 197Au(15N, X), E=69.5, 111 MeV/nucleon; 27Al, 93Nb(15N, X), E=69.5 MeV/nucleon]; measured β NMR, polarized sources; deduced μ. Model comparison.

doi: 10.1007/BF02060685
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1993OK02      Hyperfine Interactions 78, 97 (1993)

H.Okuno, K.Asahi, H.Ueno, H.Sato, M.Adachi, T.Kubo, T.Nakamura, N.Inabe, A.Yoshida, Y.Ohkubo, T.Ichihara, M.Ishihara, T.Shimoda, H.Miyatake, N.Takahashi

Polarization in Projectile Fragmentation and g-Factor Measurements for Neutron-Rich Nuclei

NUCLEAR REACTIONS 159Tb, 27Al, 93Nb, 197Au(15N, 12B), (15N, 13B), 93Nb(18O, 12B), (18O, 14B), E=70 MeV/nucleon; 197Au(14N, 12B), E=40 MeV/nucleon; 197Au(15N, 12B), (15N, 13B), E=112 MeV/nucleon; measured projectile fragment polarization.

RADIOACTIVITY 14,15B(β-n) [from 93Nb(18O, X), E=70 MeV/nucleon]; 21F(β-n) [from 93Nb(22Ne, X), E=70 MeV/nucleon]; measured NMR spectra; deduced g factor.

doi: 10.1007/BF00568122
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1992AS01      Hyperfine Interactions 75, 101 (1992)

K.Asahi, H.Okuno, H.Ueno, H.Sato, J.Kura, T.Kubo, T.Nakamura, N.Inabe, A.Yoshida, Y.Ohkubo, M.Adachi, T.Ichihara, M.Ishihara, T.Shimoda, H.Miyatake, N.Takahashi, D.Beaumel, D.J.Morrissey, W.-D.Schmidt-Ott

Spin-Oriented Projectile Fragments: The first application to g-factor measurements

NUCLEAR REACTIONS 197Au(14N, 12B), E=40.6 MeV/nucleon; 27Al(15N, 13B), E=69.5 MeV/nucleon; measured fragment spin polarization, yield.

RADIOACTIVITY 14,15B(β-) [from 93Nb(18O, X), E=70 MeV/nucleon]; measured g-factor, preliminary results.

doi: 10.1007/BF02398968
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1992KU07      Phys.Rev. C46, 361 (1992)

S.Kubono, N.Ikeda, Y.Funatsu, M.H.Tanaka, T.Nomura, H.Orihara, S.Kato, M.Ohura, T.Kubo, N.Inabe, A.Yoshida, T.Ichihara, M.Ishihara, I.Tanihata, H.Okuno, T.Nakamura, S.Shimoura, H.Toyokawa, C.C.Yun, H.Ohnuma, K.Asahi, A.Chakrabarti, T.Mukhopadhyay, T.Kajino

Decay Property of 20Na for the Onset Mechanism of the Rapid-Proton Process

RADIOACTIVITY 20Mg(β+) [from 9Be(24Mg, X), E=100 MeV/nucleon]; measured T1/2, βp-coin; deduced log ft, 19Ne(p, γ) reaction rate implications. 20Na deduced levels, possible J, π.

doi: 10.1103/PhysRevC.46.361
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1992KU24      Nucl.Instrum.Methods Phys.Res. B70, 583 (1992)

S.Kubono, Y.Funatsu, N.Ikekda, M.H.Tanaka, T.Nomura, H.Orihara, S.Kato, M.Ohura, T.Kubo, N.Inabe, T.Ichihara, M.Ishihara, I.Tanihata, H.Okuno, T.Nakamura, S.Shimoura, H.Toyokawa, C.C.Yun, H.Ohnuma, K.Asahi, A.Chakrabarti, T.Mukhopadhyay, T.Kajino

Proton Decay Measurement with RIPS for Astrophysical Interest

RADIOACTIVITY 20Mg(β+) [from 9Be(24Mg, X), E=100 MeV/nucleon]; measured decay curve. 20Na(β+p), (α); measured β-delayed particle spectra. 20Na deduced 1+ state may not be s-wave resonance.

doi: 10.1016/0168-583X(92)95987-3
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1992MA52      Hyperfine Interactions 74, 223 (1992)

S.Matsuki, K.Shimomura, I.Ogawa, K.Suzuki, S.Hamada, T.Nakamura, H.Okuno, M.Koizumi, N.Inabe, Y.Fukashiro, H.Sunaoshi, M.Wada, T.Murayama, T.Kohmoto, M.Kitano, T.Kubo, T.Shinozuka, K.Asahi, Y.Kido, T.T.Inamura, T.Nomura, M.Ishihara, M.Fujioka, H.T.Duong, H.Haas, and the ISOLDE Collaboration

Radiation-Detected Optical Pumping in Solids

NUCLEAR REACTIONS 160Gd(12C, 5np), E=100 MeV; measured residual nucleus polarization. 160Gd(12C, 6n), E=100 MeV; measured nuclear polarization following residual decay. Optical pumping in SrF, crystal.

RADIOACTIVITY 164Tm(β+) [from 164Yb-decay following production in 158Gd(12C, 6n), E=100 MeV]; measured β+ asymmetry. On-line polarization, implantation in CaF2 host crystal. 114mIn(IT); measured β+ asymmetry of 114In decay vs exciting laser wavelength. Polarization of 114In in GaAs crystal, Ti-saphire excited laser for optical pumping. 33Si(β-) [from 9Be(Ar, X), E=94 MeV/nucleon]; measured β-asymmetry, NMR vs exciting laser wavelength. Ion implantation in GaAs host crystal.

doi: 10.1007/BF02398632
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1992SH23      Hyperfine Interactions 74, 317 (1992)

K.Shimomura, T.Nakamura, H.Okuno, M.Koizumi, S.Hamada, N.Inabe, I.Ogawa, K.Suzuki, M.Wada, H.Sunaoshi, Y.Fukashiro, T.Murayama, T.Kohmoto, T.Shinozuka, T.Kubo, K.Asahi, T.Inamura, M.Ishihara, M.Fujioka, S.Matsuki

Nuclear Polarization and Magnetic Resonance of 33Si with Optical Pumping in Solids

RADIOACTIVITY 33Si(β-) [from 9Be(Ar, X), E=80, 95 MeV/nucleon]; measured β-asymmetry, more precise T1/2; deduced polarization, magnetic resonance. Scintillation-counter telescopes, implantation into liquid He cooled GaAs crystal.

doi: 10.1007/BF02398646
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1992SH31      Nucl.Instrum.Methods Phys.Res. B70, 513 (1992)

K.Shimomura, I.Ogawa, K.Suzuki, S.Hamada, T.Nakamura, H.Okuno, M.Koizumi, N.Inabe, Y.Fukashiro, H.Sunaoshi, M.Wada, S.Hatori, T.Murayama, T.Kohmoto, Y.Fukuda, T.Kubo, T.Shinozuka, K.Asahi, S.Morinobu, T.T.Inamura, M.Ishihara, M.Fujioka, M.Kondo, S.Matsuki

OPERA: An On-Line System of Optical Pumping in Solids for Unstable Nuclei

RADIOACTIVITY 166Tm(β+), (EC) [from 166Yb(EC-decay) following 160Gd(12C, 6n), E=100 MeV; 160Gd(12C, 5np), E=100 MeV]; 114In(β-), (β+), (EC) [from 114mIn(IT)]; 33Si(β-) [from 9Be(Ar, X), E=94 MeV/nucleon]; measured β asymmetry, NMR, polarized nuclei. On-line system, optical pumping in solids.

doi: 10.1016/0168-583X(92)95975-W
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1991AS01      Phys.Rev. C43, 456 (1991)

K.Asahi, M.Ishihara, T.Ichihara, M.Fukuda, T.Kubo, Y.Gono, A.C.Mueller, R.Anne, D.Bazin, D.Guillemaud-Mueller, R.Bimbot, W.D.Schmidt-Ott, J.Kasagi

Observation of Spin-Aligned Secondary Fragment Beams of 14B

NUCLEAR REACTIONS 9Be(18O, X), E=60 MeV/nucleon; measured 14B production yield, spin alignment. Doubly achromatic spectrometer, secondary beams.

doi: 10.1103/PhysRevC.43.456
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1991FU10      Phys.Lett. 268B, 339 (1991)

M.Fukuda, T.Ichihara, N.Inabe, T.Kubo, H.Kumagai, T.Nakagawa, Y.Yano, I.Tanihata, M.Adachi, K.Asahi, M.Kouguchi, M.Ishihara, H.Sagawa, S.Shimoura

Neutron Halo in 11Be Studied via Reaction Cross Sections

NUCLEAR REACTIONS 12C, 27Al(11Be, X), E=33 MeV/nucleon; measured reaction, fragmentation σ. 11Be deduced neutron halo evidence in density distribution.

doi: 10.1016/0370-2693(91)91587-L
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE1468.


1990AS01      Phys.Rev. C41, 358 (1990)

K.Asahi, K.Matsuta, K.Takeyama, K.H.Tanaka, Y.Nojiri, T.Minamisono

Half-Life and Branching Ratios of 13O Beta Decay

RADIOACTIVITY 13O(β+p) [from 14N(p, 2n), E=45 MeV]; measured β-delayed Ip, Ep, Ip/Iβ; deduced T1/2. 13N levels deduced branching ratio. Si(Au), plastic detectors. Compared with 13B decay.

doi: 10.1103/PhysRevC.41.358
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1990AS07      Phys.Lett. 251B, 488 (1990)

K.Asahi, M.Ishihara, N.Inabe, T.Ichihara, T.Kubo, M.Adachi, H.Takanashi, M.Kouguchi, M.Fukuda, D.Mikolas, D.J.Morrissey, D.Beaumel, T.Shimoda, H.Miyatake, N.Takahashi

New Aspect of Intermediate Energy Heavy Ion Reactions. Large Spin Polarization of Fragments

NUCLEAR REACTIONS 197Au(14N, 12BX), E=40.6 MeV/nucleon; measured ejectile 12B spin polarization, yield. Projectile fragmentation.

doi: 10.1016/0370-2693(90)90784-4
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1986TA13      Phys.Rev. C34, 580 (1986)

K.H.Tanaka, Y.Nojiri, T.Minamisono, K.Asahi, N.Takahashi

Polarization of 12B Produced in 14N-Induced Reactions

NUCLEAR REACTIONS 232Th, 100Mo, Cu, Fe, 45Sc, 27Al(14N, 12B), E=120, 200 MeV; measured σ(E(12B)), 12B spin polarization; deduced polarization dependence on target mass, kinetic energy loss, friction constant, frictional, direct process coexistence. Friction model.

doi: 10.1103/PhysRevC.34.580
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1984AS02      Nucl.Instrum.Methods 220, 389 (1984)

K.Asahi, M.Ishihara, H.Kamitsubo, N.Takahashi, Y.Nojiri, T.Minamisono, A.Mizobuchi, K.Sugimoto

Measurement of Ejectile Polarization in Heavy Ion Reactions via Beta-Ray Asymmetry

NUCLEAR REACTIONS 100Mo(14N, 12B), (12C, 12B), E=90, 125 MeV; 100Mo(10B, 12B), E=67, 70 MeV; 100Mo(12C, 12B), E=92, 95 MeV; measured ejectile polariztion vs (Q-value), σ(E(12B)), ejectile to background yield ratio. Beta-asymmetry, NMR techniques.

RADIOACTIVITY 12B(β-) [from 100Mo(14N, 12B), (12C, 12B), E=95 MeV; 100Mo(10B, 12B), E=70 MeV]; measured β-asymmetry; deduced 12B polarization vs (Q-value). NMR technique.

doi: 10.1016/0167-5087(84)90300-4
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1983MI20      Phys.Lett. 130B, 1 (1983)

T.Minamisono, K.Takeyama, T.Ishigai, H.Takeshima, Y.Nojiri, K.Asahi

Beta Decay Rate of the 16N(0-) → 16O(0+) Transition for the Study of Meson-Exchange Effects and g(p)/g(A).

RADIOACTIVITY 16N(β-) [from 15N(d, p), E=3.5 MeV]; measured β-, γ-time spectra, relative γ yield; deduced β-decay rate Wβ, Wβ/Wμ, g(p)/g(A).

doi: 10.1016/0370-2693(83)91050-X
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1983MI28      Hyperfine Interactions 15/16, 25 (1983)

T.Minamisono, K.H.Tanaka, Y.Nojiri, K.Asahi, N.Takahashi

Systematics of the Nuclear Spin Polarization of 12B in 14N Induced Heavy Ion Reactions

NUCLEAR REACTIONS Fe, Cu, 45Sc, 27Al(14N, 12B), E ≈ 130 MeV; measured ejectile polarization vs (Q), reaction θ, kinetic energy; deduced target dependence.

doi: 10.1007/BF02159709
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1983MI29      Hyperfine Interactions 15/16, 543 (1983)

T.Minamisono, Y.Nojiri, B.I.Deutch, K.Asahi

Hyperfine Interactions of Polarized β-Emitting 12B and 12N in Si, Ge, and GaP

RADIOACTIVITY 12N(β+) [from 10B(3He, n), E=3 MeV]; 12B(β-) [from 11B(d, p), E=2.9 MeV]; measured NMR, polarization vs temperature; deduced hyperfine fields in Si, Ge, GaP. Polarized sources, external magnetic field.

doi: 10.1007/BF02159808
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