Validity of the relativistic impulse approximation for elastic proton-nucleus scattering at energies lower than 200 MeV

Z. P. Li, G. C. Hillhouse, J. Meng

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We present the first study to examine the validity of the relativistic impulse approximation (RIA) for describing elastic proton-nucleus scattering at incident laboratory kinetic energies lower than 200MeV. For simplicity we choose a Pb208 target, which is a spin-saturated spherical nucleus for which reliable nuclear structure models exist. Microscopic scalar and vector optical potentials are generated by folding invariant scalar and vector scattering nucleon-nucleon (NN) amplitudes, based on our recently developed relativistic meson-exchange model, with Lorentz scalar and vector densities resulting from the accurately calibrated PK1 relativistic mean field model of nuclear structure. It is seen that phenomenological Pauli blocking (PB) effects and density-dependent corrections to σN and ωN meson-nucleon coupling constants modify the RIA microscopic scalar and vector optical potentials so as to provide a consistent and quantitative description of all elastic scattering observables, namely, total reaction cross sections, differential cross sections, analyzing powers and spin rotation functions. In particular, the effect of PB becomes more significant at energies lower than 200MeV, whereas phenomenological density-dependent corrections to the NN interaction also play an increasingly important role at energies lower than 100 MeV.

Original languageEnglish
Article number014603
JournalPhysical Review C - Nuclear Physics
Volume78
Issue number1
DOIs
Publication statusPublished - Jul 11 2008

Fingerprint

impulses
scalars
nuclei
protons
nuclear structure
approximation
scattering
mesons
nucleon-nucleon scattering
energy
nucleon-nucleon interactions
cross sections
folding
elastic scattering
kinetic energy

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

@article{005c210602e8440db84405e4476c021a,
title = "Validity of the relativistic impulse approximation for elastic proton-nucleus scattering at energies lower than 200 MeV",
abstract = "We present the first study to examine the validity of the relativistic impulse approximation (RIA) for describing elastic proton-nucleus scattering at incident laboratory kinetic energies lower than 200MeV. For simplicity we choose a Pb208 target, which is a spin-saturated spherical nucleus for which reliable nuclear structure models exist. Microscopic scalar and vector optical potentials are generated by folding invariant scalar and vector scattering nucleon-nucleon (NN) amplitudes, based on our recently developed relativistic meson-exchange model, with Lorentz scalar and vector densities resulting from the accurately calibrated PK1 relativistic mean field model of nuclear structure. It is seen that phenomenological Pauli blocking (PB) effects and density-dependent corrections to σN and ωN meson-nucleon coupling constants modify the RIA microscopic scalar and vector optical potentials so as to provide a consistent and quantitative description of all elastic scattering observables, namely, total reaction cross sections, differential cross sections, analyzing powers and spin rotation functions. In particular, the effect of PB becomes more significant at energies lower than 200MeV, whereas phenomenological density-dependent corrections to the NN interaction also play an increasingly important role at energies lower than 100 MeV.",
author = "Li, {Z. P.} and Hillhouse, {G. C.} and J. Meng",
year = "2008",
month = "7",
day = "11",
doi = "10.1103/PhysRevC.78.014603",
language = "English",
volume = "78",
journal = "Physical Review C - Nuclear Physics",
issn = "0556-2813",
publisher = "American Physical Society",
number = "1",

}

Validity of the relativistic impulse approximation for elastic proton-nucleus scattering at energies lower than 200 MeV. / Li, Z. P.; Hillhouse, G. C.; Meng, J.

In: Physical Review C - Nuclear Physics, Vol. 78, No. 1, 014603, 11.07.2008.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Validity of the relativistic impulse approximation for elastic proton-nucleus scattering at energies lower than 200 MeV

AU - Li, Z. P.

AU - Hillhouse, G. C.

AU - Meng, J.

PY - 2008/7/11

Y1 - 2008/7/11

N2 - We present the first study to examine the validity of the relativistic impulse approximation (RIA) for describing elastic proton-nucleus scattering at incident laboratory kinetic energies lower than 200MeV. For simplicity we choose a Pb208 target, which is a spin-saturated spherical nucleus for which reliable nuclear structure models exist. Microscopic scalar and vector optical potentials are generated by folding invariant scalar and vector scattering nucleon-nucleon (NN) amplitudes, based on our recently developed relativistic meson-exchange model, with Lorentz scalar and vector densities resulting from the accurately calibrated PK1 relativistic mean field model of nuclear structure. It is seen that phenomenological Pauli blocking (PB) effects and density-dependent corrections to σN and ωN meson-nucleon coupling constants modify the RIA microscopic scalar and vector optical potentials so as to provide a consistent and quantitative description of all elastic scattering observables, namely, total reaction cross sections, differential cross sections, analyzing powers and spin rotation functions. In particular, the effect of PB becomes more significant at energies lower than 200MeV, whereas phenomenological density-dependent corrections to the NN interaction also play an increasingly important role at energies lower than 100 MeV.

AB - We present the first study to examine the validity of the relativistic impulse approximation (RIA) for describing elastic proton-nucleus scattering at incident laboratory kinetic energies lower than 200MeV. For simplicity we choose a Pb208 target, which is a spin-saturated spherical nucleus for which reliable nuclear structure models exist. Microscopic scalar and vector optical potentials are generated by folding invariant scalar and vector scattering nucleon-nucleon (NN) amplitudes, based on our recently developed relativistic meson-exchange model, with Lorentz scalar and vector densities resulting from the accurately calibrated PK1 relativistic mean field model of nuclear structure. It is seen that phenomenological Pauli blocking (PB) effects and density-dependent corrections to σN and ωN meson-nucleon coupling constants modify the RIA microscopic scalar and vector optical potentials so as to provide a consistent and quantitative description of all elastic scattering observables, namely, total reaction cross sections, differential cross sections, analyzing powers and spin rotation functions. In particular, the effect of PB becomes more significant at energies lower than 200MeV, whereas phenomenological density-dependent corrections to the NN interaction also play an increasingly important role at energies lower than 100 MeV.

UR - http://www.scopus.com/inward/record.url?scp=47549115036&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=47549115036&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.78.014603

DO - 10.1103/PhysRevC.78.014603

M3 - Article

AN - SCOPUS:47549115036

VL - 78

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 1

M1 - 014603

ER -