Energy dependence of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi></mml:math>-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Ca</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>40</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>optical potential: A Dirac equation perspective

Arnold, L. G.; Clark, B. C.; Cooper, E.D.; Sherif, H. S.; Hutcheon, D. A.; Kitching, P.; Cameron, J.M.; Liljestrand, R. P.; MacDonald, R.; McDonald, W. J.; Miller, C. A.; Neilson, G.C.; Olsen, W.C.; Sheppard, D.M.; Stinson, G. M.; McDaniels, D.K.; Tinsley, J. R.; Mercer, R.L.; Swensen, L. W.; Schwandt, P.; Stronach, C. E.

doi:10.1103/physrevc.25.936

Cited by 54 publications

(17 citation statements)

References 60 publications

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“…1(b) we present the depth of the optical potential obtained with the MDYI over a wide energy range. We extend our inquiry to neutron kinetic energies up to 1 GeV, and compare to an earlier (and less detailed) standard analysis [34], and to a Dirac-equation based investigation [35]. (We will need this wide energy range for our EOS and QGP studies, see Secs.…”

Section: A Mean-beld Approximationmentioning

confidence: 99%

Nuclear equation of state with momentum-dependent interactions

et al. 1992

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The nuclear-matter equation of state is studied with a momentum-dependent effective interaction. The incompressibility and the zero-temperature optical potential are calculated analytically. The momentum distribution of nucleons is examined and the effect of the momentum dependence on pion-production rates is illustrated. The phase transition to a quark-gluon plasma, described by a bag-model equation of state, is studied in an approximation suitable for infinite nuclear matter. PACS number(s): 25.75.+r, 21.65.+f

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Section: A Mean-beld Approximationmentioning

confidence: 99%

Nuclear equation of state with momentum-dependent interactions

et al. 1992

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“…However, the optical potential for nucleons is highly dependent on the incident energy, and the depth of the attractive real part is known to become shallower as the energy increases. The strength of the interior part decreases more rapidly than that of the surface part, leading to the so-called winebottle-bottom shape for E in 200-300 MeV, and finally, the potential changes its sign from negative (attractive) to positive (repulsive), first at the interior part and then at the surface part also around E in ≈ 500-800 MeV [2][3][4][5][6][7][8]. The origin of such a transition of the optical potentials from attractive to repulsive has been discussed microscopically based on nucleon-nucleon interactions both in the relativistic and in the nonrelativistic frameworks.…”

Section: Introductionmentioning

confidence: 99%

Repulsive nature of optical potentials for high-energy heavy-ion scattering

2010

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The recent works by the present authors predicted that the real part of heavy-ion optical potentials changes its character from attraction to repulsion around the incident energy per nucleon E/A = 200-300 MeV on the basis of the complex G-matrix interaction and the double-folding model (DFM) and revealed that the three-body force plays an important role there. In the present paper, we have precisely analyzed the energy dependence of the calculated DFM potentials and its relation to the elastic-scattering angular distributions in detail in the case of the 12 C + 12 C system in the energy range of E/A = 100-400 MeV. The tensor force contributes substantially to the energy dependence of the real part of the DFM potentials and plays an important role to lower the attractive-to-repulsive transition energy. The nearside and farside (N/F ) decompositions of the elastic-scattering amplitudes clarify the close relation between the attractive-to-repulsive transition of the potentials and the characteristic evolution of the calculated angular distributions with the increase of the incident energy. Based on the present analysis, we propose experimental measurements for the predicted strong diffraction phenomena of the elastic-scattering angular distribution caused by the N/F interference around the attractive-to-repulsive transition energy together with the reduced diffractions below and above the transition energy.

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“…They prompted several global analyses of this scattering process in the framework of the relativistic optical model potential. The relativistic optical model potential [1][2][3][4], not discussed here in detail, is taken to be a sum of a Lorentz scalar potential and the time-like component of a vector potential. With such a relativistic potential a Dirac equation is solved numerically in order to calculate the elastic scattering observables.…”

Section: Introductionmentioning

confidence: 99%

“…These "Schrödinger equivalent" potentials consist of central and a spin-orbit parts. Around 300 Mev, the real part of the central potential has a pronounced shape takes the form of a repulsive core surrounded by an attractive part [2,3]. This requirement for a repulsive core seems to be less obvious for light target nuclei such as 4 He [5].…”

Section: Introductionmentioning

confidence: 99%

Proton Elastic Scattering from 58Ni and 90Zr at Intermediate Energy

El-moneim¹,

El-Nohy²,

Elzaher³

et al. 2012

JNPP

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Elastic proton scattering at energies between 160 and 800 MeV from 58Ni and 90Zr has been studied within the global Dirac optical model. In this work we calculate potential parameters which give good fits to the experimental data using parameterization code comprising differential cross section and analysing power measurements using DWUCK4. The real and imaginary potentials are well determined and behave regularly with energy. The behaviour of the real central effective potential shows the development of a "wine-bottle" shape in the transition energy region and the persistence of a small attractive potential in the nuclear surface region, even at 800 MeV.

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Energy dependence of thep-Ca40optical potential: A Dirac equation perspective

Cited by 54 publications

References 60 publications

Nuclear equation of state with momentum-dependent interactions

Nuclear equation of state with momentum-dependent interactions

Repulsive nature of optical potentials for high-energy heavy-ion scattering

Proton Elastic Scattering from 58Ni and 90Zr at Intermediate Energy

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