Spin isospin Laboratory

A nucleus is a finite-body quantum system of hadrons and is a self-organizing system governed by the strong interaction. How do "variety" and "regularity" develop and coexist in the nuclear world? We are aiming at clarifying its mechanism through experimental studies of radio-active nuclei produced at the RI Beam Factory.

In particular, the Spin-Isisopn Laboratory pursues research activities putting focus on interplay of spin and isospin which are manifestations of symmetry of nature.

We are, at present, performing experiments with spin-polarized protons to solve the magicity-loss problem appearing far from the beta-stability line.

Research Subjects

• Experimental studies of radioactive nuclei via direct reactions
• Search for yet-to-be-discovered states through RI-beam induced reactions
• Production of spin-polarized nuclei
• Study of nucleo-systhesis with heavy-ion storage ring

Publications

1. S. Sakaguchi, T. Uesaka et al.:
   "Analyzing power in elastic scattering of ⁶He from a polarized proton target at 71 MeV/nucleon"
   Physical Review C 84 (2011) 024604.
2. T. Uesaka, S. Sakaguchi et al.:
   "Analyzing power for the proton elastic scattering from neutron-rich ⁶He nucleus"
   Physical Review C 82 (2010) 021602(R).
3. K. Yako, M. Sasano, K. Miki, T. Uesaka et al.:
   "Gamow-Teller Strength Distributions in ⁴⁸Sc by the ⁴⁸Ca(p, n) and ⁴⁸Ti(n, p) Reactions and Two-Neutrino Double-β Decay Nuclear Matrix Elements"
   Physical Review Letters 103 (2009) 012503.
4. H. Sakai, T. Saito, T. Uesaka et al.:
   "Spin Correlations of Strongly Interacting Massive Fermion Pairs as a Test of Bell's Inequality"
   Physical Review Letters 97 (2006) 150405.
5. T. Wakui, M. Hatano T. Uesaka et al.:
   "Proton polarizing system with Ar-ion laser for image-RI scattering experiments"
   Nuclear Instruments and Methods in Physics Research A 550 (2005) 521-534.
6. K. Sekiguchi, T. Uesaka et al.:
   "Polarization transfer measurement for ¹H(d(vec), p(vec))²H elastic scattering at 135 MeV/nucleon and three-nucleon force effects"
   Physical Review C 70 (2004) 014001-1-17.
7. H. Okamura, T. Uesaka et al.:
   "Model-independent spin-parity determination by the (d, ²He) reaction and possible evidence for a 0^- state in ¹²B"
   Physical Review C 66 (2002) 054602-1-4.
8. T. Uesaka, J. Nishikawa et al.:
   "³He(d, p)⁴He reaction at intermediate energies and impulse picture of the (d, p) reactions"
   Physics Letters B 533 (2002) 1-7.
9. H. Sakai, K. Sekiguchi, T. Uesaka et al.:
   "Precise Measurement of dp Elastic Scattering at 270 MeV and Three-Nucleon Force Effects"
   Physical Review Letters 84 (2000) 5288-5291.
10. T. Uesaka, et al.:
    "Polarization correlation coefficient for the ³He(vec)(d(vec), p)⁴He reaction"
    Physics Letters B 467 (1999) 199-204.