Abstract
Exact analytical expression of the Fredholm determinant with outgoing wave boundary condition for motion in Hulthén-distorted non-local separable potential is constructed and expressed in the maximum reduced form. Using boundary conditions (regular and irregular), two approximate energy-dependent interactions corresponding to the parent non-local potential are also constructed. The phase shifts for the \( \alpha \)–\(\alpha \) elastic scattering are computed by using (i) exact expression for the Fredholm determinant and (ii) energy-dependent local interactions by exploiting the phase function method. The merits of our constructed equivalent energy-dependent potentials are judged by comparing the \( \alpha \)–\(\alpha \) elastic scattering phases with our exact calculation and standard data.
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Laha, U., Behera, A.K., Majumder, M. et al. The Fredholm determinant for Hulthén-distorted non-local separable potential: Application to \( \alpha {-}\alpha \) elastic scattering. Pramana - J Phys 94, 144 (2020). https://doi.org/10.1007/s12043-020-02012-w
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DOI: https://doi.org/10.1007/s12043-020-02012-w
Keywords
- Hulthén-distorted nuclear potential
- Fredholm determinant
- energy-dependent local potentials
- phase function methods
- alpha–alpha scattering phases