Number of quantal resonances
Zafar Ahmed, Sudhir R. Jain
Abstract
Employing the concept of time-delay, a relation is found which counts the number of quantal resonances supported by a potential. Several simple and advanced illustrations include a treatment of square-well, Dirac delta barrier, an interesting physical situation from neutron reflectometry, and the Delta resonance appearing in the scattering of πmeson from proton.
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