The Optical Model of the Nucleon-Nucleus Interaction

Annual Review of Nuclear and Particle Science (Impact Factor: 7.4). 11/2003; 17:1-32. DOI: 10.1146/annurev.ns.17.120167.000245
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    ABSTRACT: Differential cross sections for the elastic scattering of neutrons from12C at eighteen primary energies between 8.5 and 20 MeV have been analysed in terms of a standard nuclear optical model. With the exception of small diffusenesses, the parameters found to give a good description of the general features of the experimental data are similar to those found to describe the nucleon scattering from heavier nuclei.
    Zeitschrift für Physik A Hadrons and Nuclei 03/1976; 278(1):77-81.
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    ABSTRACT: Full finite-range (FFR) distorted wave Born approximation (DWBA) calculations have been performed using four types of optical potentials, namely shallow (molecular), deep non-monotonic, Michel and normal optical potentials to analyze the angular distributions of the 21 transitions in the bound states of the 48Ca( $ \alpha$ , t)49Sc reaction at 36MeV incident energy. Spectroscopic factors extracted for the levels using all these potentials are compared with those obtained from previous zero range calculations of 48Ca( $ \alpha$ , t)49Sc reaction using the normal optical potential. The normal optical and deep non-monotonic potentials fit the data satisfactorily but the shallow (molecular) and Michel potentials are not so adequate to reproduce the data for all the levels.
    European Physical Journal A 49(6). · 2.42 Impact Factor
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    ABSTRACT: The compound nucleus 76Kr* is formed in the heavy-ion fusion reactions by an asymmetric entrance channel 12C+64Zn and the symmetric entrance channel 31P+45Sc at the excitation energy of 75 MeV and angular momentum of 39 ε. Neutron energy spectra of the asymmetric system (12C+64Zn) at different angles are well described by the statistical model predictions using the normal value of the level density parameter a = A/8 MeV-1. However, in the case of the symmetric system (31P+45Sc), the statistical model interpretation of the data requires the change in the value of a = A/10 MeV-1. The delayed evolution of the compound system in case of the symmetric 31P+45Sc system may lead to the formation of a temperature equilibrated dinuclear complex, which may be responsible for the neutron emission at higher temperature, while the protons and alpha particles are evap orated after neutron emission when the system is sufficiently cooled down and the higher lambda-values do not contribute in the formation of the compound nucleus for the symmetric entrance channel in case of charged particle emission.
    AIP Conference Proceedings. 04/2010; 1224(1).