Microscopic analysis of elastic and inelastic proton scattering from 12C

Rikus, L.; Nakano, K.; Geramb, H. V. von

doi:10.1016/0375-9474(84)90611-0

Cited by 148 publications

(92 citation statements)

References 24 publications

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“…Only those processes leading to bound states of 11 B are considered, which correspond to the removal of protons from the 1p 3/2 and 1p 1/2 orbitals, because removal from the deeper 1s 1/2 orbital will lead to unbound states of 11 B. (Color online) p + 12 C microscopic optical potential generated with the PH density-dependent NN interaction [28,29], folded with the ground-state density of 12 C, at E p = 200 MeV (top) and 400 MeV (bottom). Solid and dashed lines correspond, respectively, to HF (Sk20 interaction) and empirical densities obtained from electron scattering (the latter parametrized with a 2pF distribution).…”

Section: A Application To 12 C( P Pn)mentioning

confidence: 99%

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Three-body model for the analysis of quasifree scattering reactions in inverse kinematics

Moro

2015

Phys. Rev. C

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A new method to calculate cross sections for (p,pn) and (p,2p) reactions measured under inverse kinematics conditions is proposed. The method uses the prior form of the scattering transition amplitude and replaces the exact three-body wave function appearing in this expression with an expansion in terms of p-n or p-p states, covering the physically relevant excitation energies and partial waves. A procedure of discretization, similar to that used in continuum-discretized coupled-channels calculations, is applied to make this expansion finite and numerically tractable. The proposed formalism is nonrelativistic, but several relativistic kinematical corrections are applied to extend its applicability to energies of current interest. The underlying optical potentials for the entrance and exit channels are generated microscopically by folding an effective density-dependent G matrix with the density of the composite nucleus. Numerical calculations for 12 C(p,2p), 12 C(p,pn), and 23 O(p,pn) at ∼400 MeV/nucleon are presented to illustrate the method. The role of final-state interactions and Pauli principle between the outgoing nucleons is also discussed.

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Section: A Application To 12 C( P Pn)mentioning

confidence: 99%

“…These potentials were generated with the microscopic folding approach described in Sec. II C, using the Paris-Hamburg (PH) G-matrix effective interaction [28,29]. This interaction is energy and density dependent.…”

Section: A Application To 12 C( P Pn)mentioning

confidence: 99%

Three-body model for the analysis of quasifree scattering reactions in inverse kinematics

Moro

2015

Phys. Rev. C

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“…Similar calculations using the Hamada-Johnston potential have also been performed by Yamaguchi, Nagata, and Michiyama (YNM) [65,66], who parametrized their results for T p ≤ 200 MeV in Gaussian rather than Yukawa form. The BHF approach was refined by von Geramb and collaborators [67,68], who constructed an effective interaction based upon the Paris potential [69], designated Paris-Hamburg (PH), that is applicable for 100 ≤ T p ≤ 400 MeV. Nakayama and Love [70] used the Bonn potential [71] to calculate a local pseudopotential that reproduces on-shell matrix elements of the G-matrix.…”

Section: E Local Density Approximationmentioning

confidence: 99%

Nuclear transparency to intermediate-energy protons

Kelly

1996

Phys. Rev. C

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Nuclear transparency in the (e, e ′ p) reaction for 135 ≤ T p ≤ 800 MeV is investigated using the distorted wave approximation. Calculations using densitydependent effective interactions, both empirical and theoretical, are compared with phenomenological optical potentials. We find that nuclear transparency is well correlated with proton absorption and neutron total cross sections and that calculations using density-dependent effective interactions provide the best agreement with data. Nuclear transparency calculations are compared with recent electron scattering data for Q 2 < 2 (GeV/c) 2 . For T p < ∼ 200 MeV we find that there is considerable sensitivity to the choice of optical model and that the empirical effective interaction provides the best agreement with the data, but remains 5-10% low. For T p > ∼ 300 MeV we find that there is much less difference between these models, but that the calculations significantly underpredict transparency data and that the discrepancy increases with A. The differences between Glauber and optical model calculations are related to their respective definitions of the semi-inclusive cross section. By using a more inclusive summation over final states the Glauber model emphasizes nucleonnucleon inelasticity, whereas with a more restrictive summation the optical model emphasizes nucleon-nucleus inelasticity; experimental definitions of the semi-inclusive cross section lie between these extremes.

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“…5.1.2 was used as an transition operator as well as to generate the optical potential. This is done by folding the ground state density -calculated in the framework of the QPM -with the effective interaction [Rik84]. The resulting real and imaginary parts of the central and spin-orbit potentials are shown in Fig.…”

Section: Theoretical Background Of the Proton Scattering Experimentsmentioning

confidence: 99%

The Two-Photon Decay of the 11-/2 Isomer of 137Ba and Mixed-Symmetry States of 92,94Zr and 94Mo

Walz¹

2016

Springer Theses

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The first part of this thesis covers the two-photon decay of the 11 2 − isomer in 137 Ba. Clear evidence of this exotic decay mode is found, which opens up the possibility to use the twophoton decay probability as a general tool to investigate the structure of atomic nuclei. Details on the experiment are given, and the major challenges to successfully perform this difficult experiment are outlined. The two-photon decay experiment was conducted with the new LaBr 3 -detector ball which was setup from scratch in the framework of this thesis. The properties and performance of this powerful detector system -consisting of 18 large LaBr 3 -detectors -are discussed.Furthermore, proton scattering at 200 MeV has been performed on the nuclei 92,94 Zr, 94,96 Mo and 70 Zn. The measured cross sections are compared to calculations in the framework of the Quasi-Particle Phonon Model (QPM). Conclusions about the validity of the QPM results are drawn. A comparison of the excitation cross sections of the 2 + 1 states and the one-phonon quadrupole states with mixed neutron and proton symmetry (2 + ms ) allows to prove the special character of the 2 + ms states independently of electromagnetic transition strengths. The possible existence of 3 − and 4 + states with mixed proton and neutron symmetry is discussed. Furthermore the origin of collectivity of low-lying states in spherical nuclei is investigated in the QPM. Zusammenfassung

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Microscopic analysis of elastic and inelastic proton scattering from 12C

Cited by 148 publications

References 24 publications

Three-body model for the analysis of quasifree scattering reactions in inverse kinematics

Three-body model for the analysis of quasifree scattering reactions in inverse kinematics

Nuclear transparency to intermediate-energy protons

The Two-Photon Decay of the 11-/2 Isomer of 137Ba and Mixed-Symmetry States of 92,94Zr and 94Mo

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