Relativistic impulse approximation analysis of elastic proton scattering from He isotopes

Kaki, Kaori

doi:10.1103/physrevc.89.014620

Cited by 6 publications

(2 citation statements)

References 25 publications

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“…A systematic Bruckner-Hartree-Fock study of the light nuclei was also performed and found to have large sensitivity to the NN potential and the A y observables in [16]. The Eikonal approximation was used on the helium isotopes in [17] while a relativistic impulse approximation study was undertaken in [18] with again limited success. Some researchers have had moderate success by starting with a traditional microscopic gmatrix model but then broadening the target density [19].…”

Section: Introductionmentioning

confidence: 99%

A nucleon–nucleus optical model for A ≤ 13 nuclei at 65–75 MeV projectile energy

Weppner¹

2018

J. Phys. G: Nucl. Part. Phys.

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Small nuclei (A<16) test the limits of optical potential theory, most recently there has been difficulty matching the helium isotopes' analyzing powers at 71 MeV per nucleon. We provide a phenomenological optical potential that has been fit to a variety of experimental proton-nucleus and neutron-nucleus scattering data between A=4 and A=13 with a projectile energy between 65 and 75 MeV; the motivation being the helium isotopes. The resulting potential is dependent only on projectile isospin, neutron, and proton numbers. It fits the analyzing power of 6 He satisfactorily only by including a nontraditional negative surface depth and a spin-orbit force which is significant at a distance larger than traditional models. We offer physical interpretations of our non-traditional results, suggest directions for microscopic calculations, and proffer calculations for future experiments.

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Section: Introductionmentioning

confidence: 99%

A nucleon–nucleus optical model for A ≤ 13 nuclei at 65–75 MeV projectile energy

Weppner¹

2018

J. Phys. G: Nucl. Part. Phys.

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“…See Refs. [14][15][16]22] for details. Local forms of the optical potentials have been found to be accurate at high energy for nucleon-nucleus elastic scattering due to the diffractive nature of the scattering.…”

Section: A Relativistic Impulse Approximationsmentioning

confidence: 99%

Calculation of a complete set of spin observables for proton elastic scattering from stable and unstable nuclei

et al. 2018

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A microscopic study of proton elastic scattering from unstable nuclei at intermediate energies using a relativistic formalism is presented. We have employed both the original relativistic impulse approximation (IA1) and the generalised impulse approximation (IA2) formalisms to calculate the relativistic optical potentials, with target densities derived from relativistic mean field (RMF) theory using the NL3 and FSUGold parameter sets. Comparisons between the optical potentials computed using both IA1 and IA2 formalisms, and the different RMF Lagrangians are presented for both stable and unstable targets. The comparisons are required to study the effect of using IA1 versus IA2 optical potentials, with different RMF parameter sets, on elastic scattering observables for unstable targets at intermediate energies. We also study the effect of full-folding versus the factorized form of the optical potentials on elastic scattering observables. As with the case for stable nuclei, we found that the use of the full-folding optical potential improves the scattering observables (especially spin observables) at low intermediate energy (e.g. 200MeV). No discernible difference is found at a projectile incident energy of 500 MeV. To check the validity of using localized optical potential, we calculate the scattering observables using non-local potentials by solving the momentum space Dirac equation. The Dirac equation is transformed to two coupled Lippmann-Schwinger equations, which are then numerically solved to obtain elastic scattering observables. The results are discussed and compared to calculations involving local coordinate-space optical potentials.

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Reaction cross sections of proton scattering from carbon isotopes (A=8-22) by means of the relativistic impulse approximation

Kaki

2017

Progress of Theoretical and Experimental Physics

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Reaction cross sections of carbon isotopes for proton scattering are calculated in large energy region. Density distributions of carbon isotopes are obtained from relativistic mean field results. Calculations are based on the relativistic impulse approximation, and results are compared with experimental data. A strong relationship between reaction cross section and root-mean-square radius is clearly shown for 12 C using a model distribution.

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Relativistic impulse approximation analysis of elastic proton scattering from He isotopes

Cited by 6 publications

References 25 publications

A nucleon–nucleus optical model for A ≤ 13 nuclei at 65–75 MeV projectile energy

A nucleon–nucleus optical model for A ≤ 13 nuclei at 65–75 MeV projectile energy

Calculation of a complete set of spin observables for proton elastic scattering from stable and unstable nuclei

Reaction cross sections of proton scattering from carbon isotopes (A=8-22) by means of the relativistic impulse approximation

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