M. Kamimura

Gaussian expansion method for few-body systems

Abstract We review our method of calculation, Gaussian Expansion Method (GEM), for bound and scattering states of few-body systems. The method was proposed in 1988 and has been applied to a variety of few-body systems. The understanding on the structure and the mechanisms of reactions of those systems obtained from such applications is discussed together with some useful techniques for the calculations. A well-chosen set of Gaussian basis functions forms an approximate complete set in a finite coordinate space so that it can describe accurately short-range corielations and long-range asymptotic behavior as well as highly oscillatory character of wave functions in the bound and the scattering states of the systems. Examples of applications of GEM include i) the latest determination of antiproton mass by the analysis of laser spectroscopic data for antiprotonic helium atoms, ii) predictions and experimental verifications on the structure of hypernuclei and hyperon-nucleon interactions, iii) Coulomb three-body calculations of bound and resonant states of muonic molecules as well as muon transfer reactions in muon catalyzed fusion cycles, iv) a new treatment of CDCC (continuum-discretized coupled channels) method for three- and four-body breakup processes, and v) benchmark test calculations for three- and four-nucleon bound states using realistic interactions.

Continuum-discretized coupled-channels calculations for three-body models of deuteron-nucleus reactions

Abstract The formalism and results of truncated coupled channels evaluations of three-body models of deutron-induced nuclear reactions are reviewed. Emphasis is placed on breakup, elastic scattering and stripping. The relations of the coupled channels method to the Faddeev method, the adiabatic approximation and the distorted wave Born approximation are discussed extensively. Although the adiabatic approximation is seen to be excellent for the wavefunction in the elastic channel, it significantly underestimates the contributions of breakup states in stripping. Significant effects are associated with coupling to relative l = 2 breakup states.

Four-body cluster structure of A = 7 -10 double Lambda hypernuclei

Energy levels of the double-

Stau-catalyzed 6Li production in big-bang nucleosynthesis

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Tensor interactions and polarization phenomena in heavy-ion scattering

hypernuclei

Coulomb breakup effects on the elastic cross section of He 6 + Bi 209 scattering near Coulomb barrier energies

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Quantum Three-Body Calculation of the Nonresonant Triple-α Reaction Rate at Low Temperatures

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Isotope dependence of particle-decay rates of muonic molecular ions (d3,4Heμ)J=1 below (dμ)1s-3,4He threshold

He,

Five-body cluster structure of double-

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