Dirac optical potentials constrained by a Dirac-Hartree approach to nuclear structure

Hama, S.; Bc, Clark; Re, Kozack; Shim, Sugie; Cooper, E.D.; Mercer, R.L.; Bd, Serot

doi:10.1103/physrevc.37.1111

Cited by 10 publications

(2 citation statements)

References 7 publications

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“…Relativistic treatment of nuclear reactions based on use of the Dirac equation have proved to be very successful, in particular for the description of elastic and inelastic nucleon-nucleus scatterings [1][2][3][4][5][6]. It has been shown that considerable improvements are obtained in the coupled channel calculations for the intermediate energy proton inelastic scatterings from spherically symmetric nuclei and a few deformed nuclei using Dirac phenomenology compared to the conventional nonrelativistic calculations based on Schrödinger equation [4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Dirac coupled channel analyses of the 2− gamma vibrational band excitation in 20Ne

Shim

2014

Journal of the Korean Physical Society

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Dirac coupled channel analyses are performed using optical potential model for the high-lying excited states that belong to the 2 − gamma vibrational band at the 800 MeV unpolarized proton inelastic scatterings from 20 Ne. The first order vibrational collective models are used to obtain the transition optical potentials to describe the high-lying excited vibrational collective states and Lorentz-covariant scalar and time-like vector potentials are used as direct optical potentials.The complicated Dirac coupled channel equations are solved phenomenologically to reproduce the differential cross sections data by varying the optical potential and deformation parameters using minimum chi-square method. It is found that relativistic Dirac coupled channel calculation could describe the excited states of the 2 − gamma vibrational band in 20 Ne much better than the nonrelativistic coupled channel calculation, especially for the 2 − and 3 − states of the band. It is shown that the multistep excitation process via channel coupling with the 3 − state is essential to describe the 2 − state excitation and pure direct transition from the ground state is dominant for the 3 − state excitation of the 2 − gamma vibrational band in 20 Ne.

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Section: Introductionmentioning

confidence: 99%

Dirac coupled channel analyses of the 2− gamma vibrational band excitation in 20Ne

Shim

2014

Journal of the Korean Physical Society

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“…Relativistic treatment of nuclear reactions based on use of the Dirac equation have proven to be very successful, in particular for the description of elastic and inelastic nucleon-nucleus scatterings [1][2][3][4][5][6]. Considerable improvements have been obtained in the Dirac coupled channel calculations for the intermediate energy proton inelastic scatterings from spherically symmetric nuclei and from a few deformed nuclei compared to the conventional nonrelativistic calculations based on the Schrödinger equation [4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Dirac coupled-channel analyses of the high-lying excited states at 22Ne(p,p′)22Ne

Shim

Kim

2015

Journal of the Korean Physical Society

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Dirac phenomenological coupled channel analyses are performed using an optical potential model for the high-lying excited vibrational states at 800 MeV unpolarized proton inelastic scatterings from 22 Ne nucleus. Lorentz-covariant scalar and time-like vector potentials are used as direct optical potentials and the first-order vibrational collective model is used for the transition optical potentials to describe the high-lying excited vibrational collective states. The complicated Dirac coupled channel equations are solved phenomenologically using a sequential iteration method by varying the optical potential and the deformation parameters. Relativistic Dirac coupled channel calculations are able to describe the high-lying excited states of the vibrational bands in 22 Ne clearly better than the nonrelativistic coupled channel calculations. The channel-coupling effects of the multistep process for the excited states of the vibrational bands are investigated. The deformation parameters obtained from the Dirac phenomenological calculations for the high-lying vibrational excited states in 22 Ne are found to agree well with those obtained from the nonrelativistic calculations using the same Woods-Saxon potential shape.

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A relativistic model for α-nucleus elastic scattering

1995

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Dirac optical potentials constrained by a Dirac-Hartree approach to nuclear structure

Abstract: Lorentz scalar and four-vector optical potentials are obtained for protons elastically scattered from ' 0, Ca, 'Ca, Zr, and 'Pb. It is demonstrated that Dirac optical potentials constrained by relativistic Hartree theory are capable of producing good agreement with experiment.

Cited by 10 publications

References 7 publications

Dirac coupled channel analyses of the 2− gamma vibrational band excitation in 20Ne

Dirac coupled channel analyses of the 2− gamma vibrational band excitation in 20Ne

Dirac coupled-channel analyses of the high-lying excited states at 22Ne(p,p′)22Ne

A relativistic model for α-nucleus elastic scattering

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