NUCLEON--NUCLEUS OPTICAL MODEL PARAMETERS, A &gt; 40, E &lt; 50 MeV.

Becchetti, Jr; Greenlees, G W

doi:10.2172/4752369

Cited by 35 publications

(47 citation statements)

References 1 publication

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“…Taking into account the best agreement between calculations and experimental data [6,9] (see Fig. 5) after the inclusion of the matrix element p 4 , we choose the case of r R = 1.17 fm (this result is in agreement with results [66] obtained from the fitting procedure in scattering, which is r R = 1.17 fm and r c = 1.22 fm). Analyzing the experimental data [11] at E p = 190 MeV, we obtain r R = 1.09 fm for p + 12 C, r R = 1.11 fm for p + 58 Ni, r R = 1.12 fm for p + 107 Ag and r R = 1.08 fm for p + 197 Au.…”

Section: Discussionmentioning

confidence: 61%

“…We calculate the radial wave functions R l (r) numerically concerning the chosen potential of the interaction between the proton and the spherically symmetric core. For a description of the proton-nucleus interaction we use the potential as V (r) = v c (r) + v N (r) + v so (r) + v l (r), where v c (r), v N (r), v so (r), and v l (r) are Coulomb, nuclear, spin-orbital, and centrifugal components having the form [66] …”

Section: E Inclusion Of Spin States Of the Scattering Protonmentioning

confidence: 99%

“…We use the parametrization proposed by Becchetti and Greenlees in [66] which has been tested in numerous research papers:…”

Section: E Inclusion Of Spin States Of the Scattering Protonmentioning

confidence: 99%

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New approach to determine proton-nucleus interactions from experimental bremsstrahlung data

Maydanyuk

Zhang

2015

Phys. Rev. C

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A new approach is presented to determine the proton-nucleus interactions from the analysis of the accompanying photon bremsstrahlung. We study the scattering of p + 208 Pb at the proton incident energies of 140 and 145 MeV, and the scattering of p + 12 C, p + 58 Ni, p + 107 Ag and p + 197 Au at the proton incident energy of 190 MeV. The model determines contributions of the coherent emission (formed by an interaction between the scattering proton and nucleus as a whole without the internal many-nucleon structure), incoherent emission (formed by interactions between the scattering proton and nucleus with the internal many-nucleon structure), and transition between them in dependence on the photon energy. The radius-parameter of the proton-nucleus potential for these reactions is extracted from the experimental bremsstrahlung data analysis. We explain the hump-shaped plateau in the intermediate-and high-energy regions of the spectra by the essential presence of the incoherent emission, while at low energies the coherent emission predominates which produces the logarithmic shape spectrum. We provide our predictions (in absolute scale) for the angular distribution of the bremsstrahlung photons in order to test our model, results and analysis in further experiments.

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Section: Discussionmentioning

confidence: 61%

Section: E Inclusion Of Spin States Of the Scattering Protonmentioning

confidence: 99%

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New approach to determine proton-nucleus interactions from experimental bremsstrahlung data

Maydanyuk

Zhang

2015

Phys. Rev. C

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“…Concerning the PE and CN mechanisms contribution to the deuteron activation cross sections, the optical model potentials of Koning-Delaroche [21], Daehnick et al [22], Avrigeanu et al [23], and Becchetti-Greenlees [24] for neutrons, protons, deuterons, alpha-particles and tritons have been used. The same optical potentials have been involved in the BU and DR calculations too.…”

Section: Statistical Particle Emissionmentioning

confidence: 99%

On reaction mechanisms involved in the deuteron–induced surrogate reactions

Avrigeanu¹,

Avrigeanu²,

Mănăilescu³

2015

AIP Conference Proceedings

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Abstract. An extended analysis of the nuclear reaction mechanisms involved within deuteron interaction with nuclei, namely the breakup, stripping, pick-up, pre-equilibrium emission, and evaporation from fully equilibrated compound nucleus, is presented in order to highlight the importance of the direct mechanisms still neglected in the analysis of deuteron-induced surrogate reactions. Particularly, the dominance of the breakup mechanism at low energies around the Coulomb barrier should be considered in the case of (d, x) surrogate reactions on actinide target nuclei.

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“…Basically, the parameters of optical model potential (OMP) for particle emissions were taken from global OMPs of Koning and Delaroche [12] for neutron and proton, Lohr and Haeberli [13] for deuteron, Becchetti and Greenlees [14] for triton and 3 He, and Mcfadden and Satchler [15] for a-particle, but different OMPs were also used for better evaluation as follows.…”

Section: Optical Modelmentioning

confidence: 99%

Evaluation of neutron nuclear data for Technetium-99

Iwamoto

2012

Journal of Nuclear Science and Technology

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Neutron nuclear data of 99 Tc was evaluated, considering cross-sections and spectra provided from recent experiments. The evaluation was made in the incident neutron energy range from 1 keV to 20 MeV, using the optical model and nuclear reaction models. The optical model calculation based on the coupledchannels method was performed for the interaction of neutrons with 99 Tc, and potential parameters appropriately chosen reasonably explain the measured data of total cross-section. The cross-section of inelastic scattering, capture, (n, 2n), (n, p), (n, a) and (n, n 0 a) reactions, and g-ray emission spectra were calculated on the basis of statistical model with preequilibrium and direct components, and they were compared with available experimental data. It is found that the presently evaluated cross-sections and g-ray emission spectra well reproduce those experimental values and that there is a large discrepancy among the present result and evaluated data for neutron emission spectra. The obtained capture crosssection increases at the energies below 1 MeV, relative to that in JENDL-4.0. This makes the transmutation efficiency of 99 Tc into stable 100 Ru by accelerator driven system enhanced. The production cross-section of 99 Mo important for the medical use of nuclear diagnostics reduces by 5-30% at the energies above 12 MeV, compared with JENDL-4.0.

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NUCLEON--NUCLEUS OPTICAL MODEL PARAMETERS, A > 40, E < 50 MeV.

Cited by 35 publications

References 1 publication

New approach to determine proton-nucleus interactions from experimental bremsstrahlung data

New approach to determine proton-nucleus interactions from experimental bremsstrahlung data

On reaction mechanisms involved in the deuteron–induced surrogate reactions

Evaluation of neutron nuclear data for Technetium-99

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