Comparison of average<i>s</i>-wave resonance spacings from proton and neutron resonances

Vonach, H.; Uhl, M.; Strohmaier, B.; Smith, BW; Bilpuch, E.G.; Mitchell, G. E.

doi:10.1103/physrevc.38.2541

Cited by 48 publications

(62 citation statements)

References 27 publications

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“…We have also used within actual (α, x) reaction analysis a consistent set of nucleon [38] and γ-ray transmission coefficients, and back-shifted Fermi gas (BSFG) nuclear level densities [39]. They have been established or validated on the basis of independent experimental information for neutron total cross sections [40], γ-ray strength functions, and low-lying levels [41,42] and resonance data [43], respectively.…”

Section: B Statistical Model Parametersmentioning

confidence: 99%

Further explorations of theα-particle optical model potential at low energies for the mass rangeA≈45–209

2014

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The recent high-precision measurements of α-particle induced reaction data below the Coulomb barrier (B) make possible the understanding of limits and possible improvement of a previous optical model potential (OMP) for α-particles on nuclei within the mass number range 45≤A≤209 [M. Avrigeanu et al., Phys. Rev. C 82, 014606 (2010)]. An updated version of this potential is given in the present work concerning mainly an increased surface imaginary potential depth well below B for A>130. Moreover, underestimation of reaction cross sections for well-deformed nuclei is removed by using ∼7% larger radius for the surface imaginary part of this spherical OMP. Improved input parameters based on recent independent data, particularly γ-ray strength functions, but no empirical rescaling factor of the γ and/or neutron widths have been involved within statistical model calculation of the corresponding (α, x) reaction cross sections.

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Section: B Statistical Model Parametersmentioning

confidence: 99%

Further explorations of theα-particle optical model potential at low energies for the mass rangeA≈45–209

2014

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“…The nuclear level densities were derived on the basis of the back-shifted Fermi gas (BSFG) formula [19], for the excitation energies below the neutron-binding energy, with small adjustments of the parameters a and ∆ obtained by a fit of more recent experimental low-lying discrete levels [20] and s-wave nucleon resonance spacings D 0 [21]. Above the neutron binding we took into account the washing out of shell effects within the approach of Ignatyuk et al [22] and Junghans et al [23], and using the method of Koning and Chadwick [24] for fixing the appropriate shell correction energy.…”

Section: Pre-equilibrium and Statistical Emissionmentioning

confidence: 99%

Assessment of deuteron-induced reaction mechanisms at low and medium energies

Avrigeanu

2010

EPJ Web of Conferences

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Abstract. An extended analysis of the nuclear reaction mechanisms involved in the deuterons interaction with 63,65 Cu is presented. First, the available elastic-scattering data analysis provided us the optical potential for reaction cross sections calculations. An increased effort has been devoted to the breakup mechanism, both the elastic breakup and the breakup fusion contributions to the different activation cross sections being carefully considered. Next, the direct reaction contributions through the one nucleon stripping reaction cross sections have been calculated. Finally, the pre-equilibrium and compound-nucleus cross-section calculation, corrected for the breakup and stripping decrease of the total reaction cross section, completed the deuteron activation cross-section analysis. The overall agreement between the measured and calculated deuteron activation cross sections proves the correctness of the nuclear mechanisms account.

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“…The nuclear level densities were derived on the basis of the back-shifted Fermi gas (BSFG) formula [29], for the excitation energies below the neutron-binding energy, with the parameters a and ∆ [5] obtained by a fit of more recent experimental low-lying discrete levels [30] and s-wave nucleon resonance spacings D 0 [19]. Above the neutron binding we took into account the washing out of shell effects within the approach of Ignatyuk et al [31] and Junghans et al [32], and using the method of Koning and Chadwick [33] for fixing the appropriate shell correction energy.…”

Section: Nuclear Level Densitymentioning

confidence: 99%

On neutron-induced reaction mechanisms at medium energies

Avrigeanu

Román

2012

EPJ Web of Conferences

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Abstract. Recent accurate data obtained for the isomeric cross section of the 197 Au(n, 2n) reaction provides an effective opportunity to consider the question of the effective moment of inertia of the nucleus within a consistent model analysis of all available reaction data for the 197 Au target nucleus. Moreover, since the corresponding model assumptions are better validated by analysis of the data above 20-30 MeV where only several data with large uncertainties are known, the usefulness of further measurements to be performed at large-scale facilities as SPIRAL-2 and n TOF, for incident energies up to 40 as well as 100 MeV, are underlined.

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Comparison of averages-wave resonance spacings from proton and neutron resonances

Cited by 48 publications

References 27 publications

Further explorations of theα-particle optical model potential at low energies for the mass rangeA≈45–209

Further explorations of theα-particle optical model potential at low energies for the mass rangeA≈45–209

Assessment of deuteron-induced reaction mechanisms at low and medium energies

On neutron-induced reaction mechanisms at medium energies

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