Proton scattering on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>A</mml:mi><mml:mo>=</mml:mo><mml:mn>92</mml:mn><mml:mo>−</mml:mo><mml:mn>116</mml:mn><mml:mn /></mml:math>nuclei with extended optical models and the interacting boson approximation

Cereda, E.; Pignanelli, M.; Micheletti, S.; Vongeramb, Hv; Harakeh, Mohsen; Deleo, R; D’Erasmo, G.; Pantaleo, A.

doi:10.1103/physrevc.26.1941

Cited by 35 publications

(15 citation statements)

References 34 publications

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“…16(a)], only one study of n+ A Mo [76] was found; whereas for protons [ Fig. 16(b)], studies of seven reactions from p+ A Ca to p+ A Sn [45,[77][78][79][80] were found. As for the low-energy data in Fig.…”

Section: B Neutron Asymmetry Dependencementioning

confidence: 99%

Dispersive-optical-model analysis of the asymmetry dependence of correlations in Ca isotopes

et al. 2007

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A dispersive-optical-model analysis of p+ 40,42,44,48 Ca and n+ 40 Ca interactions has been carried out. The real and imaginary potentials have been constrained by fitting elastic-scattering data, total and reaction cross sections, and level properties of valence hole states deduced from (e, e p) data. The resulting surface imaginary potential increases with asymmetry for protons, implying that in heavier Ca isotopes, protons experience stronger long-range correlations. Presently, there is not enough data for neutrons to determine their asymmetry dependence. Global optical-model fits usually assume that the neutron asymmetry dependence is equal in magnitude, but opposite in sign, to that for protons. Such a dependence was found to give unphysical results for heavy Ca isotopes. The dispersive optical model is shown to be a useful tool for data-driven extrapolations to the drip lines. Neutron and proton data at larger asymmetries are needed to achieve more reliable extrapolations. The present analysis predicts 60 Ca and 70 Ca to be bound, while the intermediate isotopes are not.

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Section: B Neutron Asymmetry Dependencementioning

confidence: 99%

Dispersive-optical-model analysis of the asymmetry dependence of correlations in Ca isotopes

et al. 2007

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“…In this case, the elasticity parameter of γ-vibration was determined so as to describe corresponding measured inelastic scattering cross sections, since we could not determine its elasticity parameter due to the difficulty of the level assignment in the SRM analysis. Of course, those calculations could be applied only to the cases where inelastic scattering experimental data were available: 54 As an example, the calculated inelastic scattering cross sections are illustrated in figure 2 for 100 Mo together with the experimental data [10][11][12]. It should be emphasized that the calculated cross sections of 3 − excitation reproduce the data very well.…”

Section: Srm-cc Analyses For Proton Scatteringmentioning

confidence: 99%

Systematical nucleon-induced optical model analysis for medium and heavy nuclei with coupled-channel framework

Kunieda

Chiba

Shibata

et al. 2007

Nd2007

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Abstract. Optical model analyses have been carried out for nucleon-induced reactions on medium and heavy nuclei from 1 keV up to 200 MeV. The coupled-channels method based on the rigid-rotator model has been employed as an initial approach. It has been found that the coupled-channels analyses are indispensable to obtain a global formulation of optical potential. In addition, the coupled-channels calculation based on the soft-rotator model has been applied to analyses for various even-even fission product isotopes. They reproduced measured cross sections better than the rigid-rotator model in many cases. Though the latter is our ongoing study, we show the advantage of coupled-channels calculations and the applicability of the soft-rotator model.

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“…A second source of nonlocality is due to the coupling of the inelastic excitations to the nuclear ground state during the scattering process [2], that gives rise to a nonlocal dynamic polarization potential in the elastic channel. Since this nonlocality is difficult to take into account rigorously, it is usually accounted for by numerically coupling a few important inelastic channels to the elastic channel [10,11]. However, when the energy of the incident nucleon is low enough, the scattering process is strongly affected by the individual discrete states of the target nucleus.…”

Section: Introductionmentioning

confidence: 99%

Evidence of nonlocality due to a gradient term in the optical model

Jaghoub¹,

Rawitscher²

2012

Nuclear Physics A

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We demonstrate that the presence of a velocity-dependent term in the phenomenological optical potential simulates a source of nonlocality. This is achieved by showing that, in the interior of the nucleus, the nonlocal wave functions are different from the corresponding local ones obtained in the absence of the velocity-dependent term in accordance with the Perey effect. It is also shown that the enhancement or suppression of the nonlocal wave function is energy as well as angular momentum dependent. The latter is in line with the results of previous works that introduced parity dependent terms in the conventional optical potential.

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Proton scattering onA=92−116nuclei with extended optical models and the interacting boson approximation

Cited by 35 publications

References 34 publications

Dispersive-optical-model analysis of the asymmetry dependence of correlations in Ca isotopes

Dispersive-optical-model analysis of the asymmetry dependence of correlations in Ca isotopes

Systematical nucleon-induced optical model analysis for medium and heavy nuclei with coupled-channel framework

Evidence of nonlocality due to a gradient term in the optical model

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