Momentum Distributions in Nuclei

Antonov, A. N.; Hodgson, P. E.; Petkov, I.Zh.

doi:10.1007/978-3-642-77766-0_7

Cited by 39 publications

(112 citation statements)

References 155 publications

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“…(15) and (16) and finally the scaling function using the expressions in Eqs. (6) and (7). As already mentioned, the HO model is not capable of producing the strong asymmetry observed in the data, but it can be seen that for q > 600-700 MeV/c, scaling of the first kind is fulfilled.…”

Section: Scaling Function In Relation To the Spectral Function Anmentioning

confidence: 62%

“…Finally, we give in Fig. 6 as an example (being considered and used in our previous work) the result obtained with the coherent density fluctuation model (CDFM) [4,7,11]; see also [21,23]. The model is a natural extension of the RFG model.…”

Section: Scaling Function In Relation To the Spectral Function Anmentioning

confidence: 99%

“…This leads to the spreading of the shell structure and only a careful study of the momentum dependence of S(p, E) can separate the contributions from different shells [4]. Such analyses have been carried out for few-body systems, complex nuclei, and nuclear matter and have focused mainly on the existence of high-momentum components of the nucleon momentum distribution due to NN correlation effects [2][3][4][5][6][7]. Since it is impossible within the MFA to describe simultaneously the density and momentum distributions in nuclei [4,[7][8][9][10][11][12], a consistent analysis of the role of the NN correlations is required using theoretical methods that go beyond the MFA to obtain a successful description of the relevant experiments.…”

Section: Introductionmentioning

confidence: 99%

“…Such analyses have been carried out for few-body systems, complex nuclei, and nuclear matter and have focused mainly on the existence of high-momentum components of the nucleon momentum distribution due to NN correlation effects [2][3][4][5][6][7]. Since it is impossible within the MFA to describe simultaneously the density and momentum distributions in nuclei [4,[7][8][9][10][11][12], a consistent analysis of the role of the NN correlations is required using theoretical methods that go beyond the MFA to obtain a successful description of the relevant experiments. The present study uses the results found from studies of y scaling [1][2][3][13][14][15] and superscaling (based on ψ-scaling variable) [15][16][17][18][19][20][21][22][23] obtained from analyses of inclusive electron scattering data.…”

Section: Introductionmentioning

confidence: 99%

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Scaling function, spectral function, and nucleon momentum distribution in nuclei

et al. 2011

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The link between the scaling function extracted from the analysis of (e, e ) cross sections and the spectral function/momentum distribution in nuclei is revisited. Several descriptions of the spectral function based on the independent particle model are employed, together with the inclusion of nucleon correlations, and effects of the energy dependence arising from the width of the hole states are investigated. Although some of these approaches provide rough overall agreement with data, they are not found to be capable of reproducing one of the distinctive features of the experimental scaling function, namely its asymmetry. However, the addition of final-state interactions, incorporated in the present study using either relativistic mean-field theory or via a complex optical potential, does lead to asymmetric scaling functions in accordance with data. The present analysis seems to indicate that final-state interactions constitute an essential ingredient and are required to provide a proper description of the experimental scaling function.

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Section: Scaling Function In Relation To the Spectral Function Anmentioning

confidence: 62%

Section: Scaling Function In Relation To the Spectral Function Anmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Scaling function, spectral function, and nucleon momentum distribution in nuclei

et al. 2011

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“…[15,16]). The CDFM has been successfully applied for different tasks: to calculate nuclear properties of the ground and first monopole states, in scaling analyses etc.…”

Section: Introductionmentioning

confidence: 99%

Symmetry energy and surface properties of neutron-rich exotic nuclei

Gaidarov

Antonov

Sarriguren

et al. 2014

AIP Conference Proceedings

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Abstract. The symmetry energy, the neutron pressure and the asymmetric compressibility of spherical Ni, Sn, and Pb and deformed Kr and Sm neutron-rich even-even nuclei are calculated within the coherent density fluctuation model using the symmetry energy as a function of density within the Brueckner energy-density functional. The correlation between the thickness of the neutron skin and the characteristics related with the density dependence of the nuclear symmetry energy is investigated for isotopic chains of these nuclei in the framework of the deformed self-consistent mean-field Skyrme HF+BCS method. The mass dependence of the nuclear symmetry energy and the neutron skin thickness are also studied together with the role of the neutron-proton asymmetry. The studied correlations reveal a smoother behavior in the case of spherical nuclei than for deformed ones. We also notice that the neutron skin thickness obtained for 208 Pb with SLy4 force is found to be in a good agreement with the recent data. In addition to the interest that this study may have by itself, we give some numerical arguments in proof of the existence of peculiarities of the studied quantities in Ni and Sn isotopic chains that are not present in the Pb chain.

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Short-Range Correlations and Meson Exchange Currents in Photonucleon Emission

et al. 2002

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One-nucleon emission processes induced by photon absorption are studied by considering shortrange correlation effects. At energies above the giant resonance region the validity of the direct knockout model has been tested by comparison with continuum random phase approximation results. Nucleon re-scattering effects have been considered by using an optical potential. The role of the electromagnetic convection, magnetization, and meson exchange currents has been investigated as a function of both excitation energy and momentum transfer. The short-range correlation effects have been studied by using various correlation functions. We found that the nucleon photo-emission cross section is rather sensitive to the presence of short-range correlations at large values of nucleon emission angle. In this region, however, the effects of meson exchange currents are even larger than those produced by short-range correlations. C 2002 Elsevier Science (USA)

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Momentum Distributions in Nuclei

Cited by 39 publications

References 155 publications

Scaling function, spectral function, and nucleon momentum distribution in nuclei

Scaling function, spectral function, and nucleon momentum distribution in nuclei

Symmetry energy and surface properties of neutron-rich exotic nuclei

Short-Range Correlations and Meson Exchange Currents in Photonucleon Emission

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