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Creators/Authors contains: "Kevrekidis, P. G."

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  1. The 116,118,120,122,124In nuclei have been popu- lated as fission fragments in reactions induced by heavy ions. Level schemes have been built from γ-rays detected using the Gammasphere array. Medium-spin states of 118,120In69,71 nuclei have been identified for the first time, while the level schemes of 116,122,124In67,73,75 were enriched. The observed states at lower excitations and at medium spin can be described by the coupling of the proton g9/2 hole to the neutron or neutron-hole in the h11/2 orbital. This coupling can now be followed in all odd-odd In isotopes from 104In to 126In 
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  2. Abstract The nonlinear Schrödinger (NLS) equation in one dimension is considered in the presence of an intensity-dependent dispersion term. We study bright solitary waves with smooth profiles that extend from the limit where the dependence of the dispersion coefficient on the wave intensity is negligible to the limit where the solitary wave becomes singular due to vanishing dispersion coefficient. We analyse and numerically explore the stability for such smooth solitary waves, showing with the help of numerical approximations that the family of solitary waves becomes unstable in an intermediate region between the two limits, while being stable in both limits. This bistability, which has also been observed in other NLS equations with generalized nonlinearity, brings about interesting dynamical transitions from one stable branch to another stable branch, which are explored in direct numerical simulations of the NLS equation with the intensity-dependent dispersion term. 
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