核物質学グループ　最近の研究業績から

★原子核電磁気モーメントと核構造　関連

  • Magnetic moment of the short-lived beta-emitter 23Mg
    M. Fukuda, et al., Phys. Lett. B307 (1993) 278.
  • Magnetic Moment of Proton Drip-Line Nucleus 9C
    K. Matsuta, et al., Nucl. Phys. A588 (1995) 153c.
  • Quadrupole Moment of the Proton Drip-Line Nuclide 13O
    K. Matsuta, et al., Phys. Lett. B 459 (1999) 81.
  • Electromagnetic Moments of the beta-Emitter 19O
    T. Minamisono, et al., Phys. Lett. B 457 (1999) 9.
  • Electromagnetic Moments of the Nucleus 16N
    K. Matsuta, et al., Physical Review Letters 86 (2001) 3735.
  • Recent Studies on the Nuclear Moments of Light Mirror Nuclei (T=1/2,3/2)
    K. Matsuta, et al., Nucl. Phys. A 704 (2002) 98.
  • Magnetic Moment of 33Cl
    K. Matsuta, et al., Nucl. Phys. A 746 (2004) 493.
  • Measurement of Spin and Magnetic Moment of 23Al
    A. Ozawa, et al., Phys. Rev. C 74 (2006) 021301(R).
  • Electric quadrupole moment of the proton halo nucleus 8B
    T. Sumikama, et al., Phys. Rev. C 74 (2006) 24327-1-5.
  • Quadrupole Moments of Neutron-Deficient 20,21Na
    K. Minamisono, et al., Phys. Lett. B 672 (2009) 120-125.

★核反応断面積と核子密度分布　関連

  • Neutron halo in 11Be studied via reaction cross sections
    M. Fukuda, et al., Phys. Lett. B268 (1991) 339.
  • Density distribution of 8B studied via reaction cross sections
    M. Fukuda, et al., Nucl. Phys. A 656 (1999) 209.
  • Density distribution of 17B from a reaction cross-section measurement
    Y. Yamaguchi, et al., Physical Review C 70 (2004) 054320.
  • Density distribution of proton drip-line nucleus 17Ne
    K. Tanaka, et al., Nucl. Phys. A 746 (2004) 532.
  • Reaction cross-sections for stable nuclei and nucleon density distribution of proton drip-line nucleus 8B
    M. Takechi, et al., Eur. Phys. J. A 25 (2005) 217.
  • Nuclear matter radii of neutron-deficient Kr isotopes
    T. Yamaguchi, et al., Phys. Rev. C 77 (2008) 034315-6.
  • Reaction cross sections at intermediate energies and Fermi-motion effect
    M. Takechi, et al., Phys. Rev. C 79 (2009) 061601(R).
  • Observation of a large reaction cross section in the drip-line nucleus 22C
    K. Tanaka, et al., Phys. Rev. Lett. 104 (2010) 062701-1-4.
    Physics Today : http://scitation.aip.org/journals/doc/PHTOAD-ft/vol_63/iss_2/16_1.shtml
  • Scaling of charge-changing interaction cross sections and point-proton radii of neutron-rich carbon isotopes
    T. Yamaguchi, et al., Phys. Rev. Lett. 107 (2011) 032502-1-4.
  • Interaction cross sections for Ne isotopes towards the island of inversion and halo structures of 29Ne and 31Ne
    M. Takechi, T. Ohtsubo, M. Fukuda et al., Phys. Lett. 707 (2012) 357-361.

★超微細相互作用と物質科学　関連

  • Lattice Locations of 12B in CaB6
    M. Mihara, et al., Z. Naturforsch. 57a (2002) 617.
  • Synthesis of CaB6 Single Crystals and Sample Evaluation by PIXE Measurement
    M. Mihara, et al., Int. J. PIXE 15 (2005) 85.
  • Shallow nitrogen acceptor in TiO2 studied by beta-NMR spectroscopy
    M. Mihara, et al., Physica B 401-402 (2007) 430-432.
  • Muon Spin Relaxation in Hydrogen Tungsten Bronze
    M. Mihara, et al., Physica B 404 (2009) 801-803.
  • Tilted-foil technique for producing a spin-polarized radioactive isotope beam
    Y. Hirayama, M. Mihara, et al., Eur. Phys. J. A 48 (2012) 1-10.

★β崩壊と対称性　関連

  • New Limit of the G-parity Irregular Weak Nucleon Current Disclosed in beta-Ray Angular Distributions from Spin Aligned 12B and 12N
    T. Minamisono, et al., Phys. Rev. Lett. 80 (1998) 4132.
  • In-medium nucleon mass renormalization detected in b decays of spin aligned 12B and 12N
    K. Minamisono, et al., Phys. Rev. C 65 (2002) 015209.
  • G-parity irregular current in the b decays of the mass A = 12 system - with the refined empirical value of the weak magnetism -
    K. Minamisono, et al., Nucl. Phys. A 721 (2003) 477.
  • Beta-Ray Angular Distributions of Spin Aligned 8Li and 8B
    T. Sumikama, et al., Nucl. Phys. A 746 (2004) 681.
  • Search for the G-Parity Irregular Term in Weak Nucleon Currents Extracted
    from Mirror Beta Decays in the Mass 8 System
    T. Sumikama, et al., Phys. Lett. B 664(2008) 235.
  • Test of the conserved vector current hypothesis by a β-ray angular distribution measurement in the mass-8 system
    T. Sumikama, K. Matsuta, T. Nagatomo et al., Phys. Rev. C83 (2011) 065501.
  • Low-energy test of second-class current in β decays of spin-aligned 20F and 20Na
    K. Minamisono, T. Nagatomo, K. Matsuta et al., Phys. Rev. C84 (2011) 055501.

★超冷中性子(UCN)　関連

  • Neutron electric dipole moment measurement with a buffer gas comagnetometer
    Y. Masuda, K. Asahi, K. Hatanaka, S.-C. Jeong, S. Kawasaki, R. Matsumiya, K. Matsuta, M. Mihara, Y. Watanabe, Phys. Lett. A 376 (2012) 1347-1351.
  • Spallation ultracold neutron source of superfluid helium below 1K
    Y. Masuda, K. Hatanaka, S.-C. Jeong, S. Kawasaki, R. Matsumiya, K. Matsuta, M. Mihara, Y. Watanabe, Phys. Rev. Lett. 108(2012) 134801.