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Eigenvalue problem for a coupled channel Schrödinger equation with application to the description of deformed nuclear systems. (English) Zbl 1165.65046
Summary: We discuss the accurate computation of the eigensolutions of systems of coupled channel Schrödinger equations as they appear in studies of real physical phenomena like fission, alpha decay and proton emission. A specific technique is used to compute the solution near the singularity in the origin, while on the rest of the interval the solution is propagated using a piecewise perturbation method. Such a piecewise perturbation method allows us to take large steps even for high energy-values. We consider systems with a deformed potential leading to an eigenvalue problem where the energies are given and the required eigenvalue is related to the adjustment of the potential, viz, the eigenvalue is the depth of the nuclear potential. A shooting technique is presented to determine this eigenvalue accurately.

MSC:
65L15 Numerical solution of eigenvalue problems involving ordinary differential equations
65L10 Numerical solution of boundary value problems involving ordinary differential equations
34L16 Numerical approximation of eigenvalues and of other parts of the spectrum of ordinary differential operators
34L40 Particular ordinary differential operators (Dirac, one-dimensional Schrödinger, etc.)
81Q05 Closed and approximate solutions to the Schrödinger, Dirac, Klein-Gordon and other equations of quantum mechanics
Software:
COULCC; LILIX; PERSYS
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