No abstract available

[en] Spin-dependent interactions responsible for vector analyzing powers in elastic scattering of ^6,7Li are investigated with a special interest in the competition between folding spin-orbit potentials and higher orders of tensor interactions including projectile virtual excitations. For 150 > approx E_lab > approx 40 MeV, they are both important. For E_lab < approx 20 MeV, however, the folding spin-orbit potential cannot be effective because the attenuation due to the projectile excitation and/or the Coulomb barrier prevent the projectile from intruding into the spin-orbit effective area. (author)

[en] Scattering of ⁷Li by ¹²⁰Sn targets at E_lab = 44 MeV is investigated in the coupled-channel frame by taking account of the projectile virtual excitations to the lowest three excited states. Calculations are performed by the cluster-folding (CF) interactions and the double-folding (DF) one. Both interactions reproduce very well the expeimental data on the cross section, the vector analyzing power, the second-rank tensor ones and the third-rank tensor one in elastic and projectile inelastic scattering, although some differences are found between the CF results and the DF ones. In the calculation, the virtual excitations of the projectile are important for most of the analyzing powers and the spin-orbit interaction is indispensable for the vector analyzing power. These features are in contrast to those in ⁷Li - ⁵⁸Ni scattering at 20 MeV and are interpreted as over-Coulomb-barrier effects. The scattering amplitudes and the analyzing powers are investigated by the invariant amplitude method, which provides a key connecting the spin-dependent interactions to the analyzing powers. The method proposes an important relationship between the tensor analyzing powers, which is useful in analyses of both theoretical and experimental results. Finally, it is found that in the elastic scattering the second-rank tensor analyzing powers are proportional to the strength of the second-rank tensor interaction and the vector and third-rank tensor analyzing powers to the square or cube of the strength of this interaction, while in the inelastic scattering the cross section is proportional to the square of the strength of the tensor interaction, other quantities being weakly dependent on the strength. (author)

No abstract available

[en] I review my work on the muon catalyzed fusion done in these four years. First, I recapitulate my method of coupled rearrangement channels for three-body systems, and show the results of its applications to muonic molecules and muon transfer reactions. (author)

[en] Coupled-rearrangement-channel method is suited for describing loosely coupled three-body systems. In the meeting, we reported successful applications of the method to i) 3α OCM calculation of ¹²C, ii) three-body OCM calculation of the ground state of ¹¹Li and the soft dipole state, iii) the ground and excited states of the three-⁴He-atom system, iv) decay mechanism of muonic molecule (d³Heμ), and v) muon transfer reaction (dμ)+t → (tμ)+d. For the three-body OCM calculations, we developed a method with the use of the Kukulin's pseudo potential for the orthogonality condition. In this note, we report only about the work ii). (author)

[en] All the multipole transition densities between the seven T = 0 states in ¹²C are calculated with the use of the microscopic 3α resonating-group wave functions which are obtained by dynamically solving the 3α relative motion with the total antisymmetrization taken into account exactly. The observed elastic and inelastic electron scattering form factors for the transition to the 2⁺₁, 4⁺₁, 0⁺₂, 1^-₁ and 3^-₁ states are well reproduced with no additional effective charge. The existence of a deformed intrinsic state for the 0⁺₁, 2⁺₁ and 4⁺₁ states is deduced by the analysis of the transition densities between them which are derived by the weak-coupling-type 3α wave functions; the intrinsic density distribution is illustrated. The monopole density distribution of the 0⁺₂, 2⁺₂ and 1^-₁ states is found to be much longer ranged than that of the 0⁺₁, 2⁺₁ and 4⁺₁ states; the 3^-₁ state case is intermediate. On the basis of the transition densities between the 0⁺₁, 2⁺₁, 0⁺₂ and 2⁺₂ states, analysis is made of the transition between the shell-like states and the molecular-like states with a large spatial-structure change. Specific, effective nucleon-nucleon interactions are folded into the transition densities here obtained. The evident dependence of the radial shape of the folded nucleon-¹²C form factors on the choice of the interactions and the multi-step form factors for the excitation of the 0⁺₂, 1^-₁ and 3^-₁ states are discussed. (orig.)

[en] Muon catalyzed fusion (μCF) is briefly reviewed. It is then shown that some ideas and methods in cluster physics are very useful in the precise study of theoretical problems in the muon catalyzed fusion. (author)

No abstract available

[en] First we briefly survey the muon catalyzed fusion, and explain the non-adiabatic coupled-rearrangement-channels method which gives accurate energies of the (dtμ) molecule with a very short computational time. In order to discuss the fusion rates in the muonic molecule, we determine complex nuclear potential between d and t by fitting the cross sections of the resonant d+t→⁴He+n reactions. The interaction is incorpolated in the three-body Hamiltonian and the Schroedinger equation is solved with the coupled-rearrangement-channel method. Fusion rates are estimated from the imaginary part of the complex eigenenergies. The muon sticking probabilities of the J=0 states of the (dtμ) molecule are found to be increased by 4∼5 % due to the effect of the nuclear interaction. (author)