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Fülöp, Zs.; Gyürky, Gyuri; Máté, Z.; Somorjai, E.; Zolnai, L.; Galaviz, D.; Babilon, M.; Mohr, P.; Zilges, A.; Rauscher, T.; Oberhummer, H.; Staudt, G.

doi:10.1103/physrevc.64.065805

Cited by 56 publications

(16 citation statements)

References 44 publications

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“…Systematic studies using elastic α scattering were carried out [16,17,18,19]. The results were compared to and combined with activation measurements of α-induced reactions such as (α,γ), (α,p), and (α,n) (see Fig.…”

Section: Experiments On Particle-induced Reactionsmentioning

confidence: 99%

Activation Experiments forp-Process Nucleosynthesis

Sonnabend¹,

Glorius²,

Knörzer³

et al. 2011

J. Phys.: Conf. Ser.

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Abstract. Activation experiments are a perfect tool to perform systematic studies due to their high sensitivity and selectivity. Exemplary applications to understand the nucleosynthesis of the p nuclei -such as the optimization of optical particle-nucleus potentials and investigations of (γ,n) reactions in a broad mass range -are presented. Some recent and partly preliminary results are briefly discussed.

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Section: Experiments On Particle-induced Reactionsmentioning

confidence: 99%

Activation Experiments forp-Process Nucleosynthesis

Sonnabend¹,

Glorius²,

Knörzer³

et al. 2011

J. Phys.: Conf. Ser.

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“…The main goal of this work was to obtain the potential that accurately describes the measured crosssection data. As shown in previous works [4,5] there are several potential families, corresponding to different depths of the real part of the nuclear potential, that describe with similar quality the elastic scattering data at energies around the Coulomb barrier. Following a similar approach we have performed a systematic variation of the real part of the nuclear potential studying the angular…”

Section: Systematic Study: the Family Problemmentioning

confidence: 99%

“…By measuring the angular distribution of alpha particles at energies close above the Coulomb barrier it is possible to extract information on the α-nucleus potential. However, as shown for 144 Sm [4] and 92 Mo [5], at these energies several "families" of the potential (characterized by different depths of the real nuclear potential) provide an equally good description of the scattering data. Here we present the first results obtained in the analysis of the potential families extracted from the angular distribution of the reaction 106 Cd(α, α) 106 Cd [6] measured at the ATOMKI laboratory at energies around the Coulomb barrier.…”

Section: Introductionmentioning

confidence: 99%

How important is the Family? Alpha nuclear potentials and p-process nucleosynthesis

Ornelas¹,

Fülöp²,

Galaviz³

et al. 2011

Proceedings of 11th Symposium on Nuclei in the Cosmos — PoS(NIC XI)

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“…The present brief report provides the total reaction cross sections σ reac from high-precision α-scattering experiments performed at ATOMKI, Debrecen, Hungary [9][10][11][12]. These scattering data cover an angular range between 20 • and 170 • in steps of about 1 • −2 • and show small error bars below ≈4% over the whole angular range which is by far sufficient to derive the total reaction cross section with small uncertainties.…”

mentioning

confidence: 96%

Total reaction cross sections from elasticα-nucleus scattering angular distributions around the Coulomb barrier

Mohr¹,

Galaviz²,

Fülöp³

et al. 2010

Phys. Rev. C

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The total reaction cross section σ reac is a valuable measure for the prediction of α-induced reaction cross sections within the statistical model and for the comparison of scattering of tightly bound projectiles to weakly bound and exotic projectiles. Here we provide the total reaction cross sections σ reac derived from our previously published angular distributions of elastic α-nucleus scattering on 89 Y, 92 Mo, 112,124 Sn, and 144 Sm at energies around the Coulomb barrier. The total reaction cross section σ reac is related to the complex scattering matrix S L = η L exp (2iδ L ) by the wellknown relationwhere k = √ 2µE/h is the wave number and η L and δ L are the real reflexion coefficients and scattering phase shifts. Usually, experimental elastic-scattering angular distributions are analyzed using a complex optical potential. Although there are considerable uncertainties in the extraction of the optical potential from elastic scattering at low energies around the Coulomb barrier, the underlying reflexion coefficients and phase shifts are well defined, as long as the measured angular distribution covers the full angular range from 0 • to 180 • and it is well described by the chosen optical potential. Thus, the total reaction cross section σ reac can be extracted from experimental elastic-scattering angular distributions with small uncertainties. Although the analysis uses optical potentials, that is, input from theory, in practice the obtained total reaction cross section σ reac can be considered an experimental quantity because of its insensitivity to the potential as long as the potential accurately reproduces the elastic-scattering angular distribution.A completely model-independent determination of σ reac is also possible by a direct fit of the reflexion coefficients η L and phase shifts δ L to the angular distribution. However, in practice such fits are not widely used because η L and δ L have to be determined for angular momenta up to about L = 30, that is, around 60 parameters have to be fitted simultaneously. This may lead to an oscillatory behavior of the calculated cross sections in angular regions where no experimental data are available to restrict the multiparameter model-independent fit [1]. Therefore, model-independent analyses are not the ideal tool for the determination of total reaction cross sections σ reac .It has unfortunately become a common practice in optical model analyses of elastic α-nucleus scattering data not to give σ reac explicitly, although this number is implicitly determined in any optical model calculation, as Eq. (1) shows. Nevertheless it has been noticed recently that σ reac is a very valuable quantity in several respects. First, a significantly different energy dependence of σ reac has been observed in the comparison of scattering of tightly bound projectiles like α or 16 O, weakly bound projectiles like 6,7,8 Li, and exotic projectiles with halo properties like 6 He and 11 Be (e.g., Refs. [2-5]). As a consequence, σ reac is practically always provided in analyses of 6 ...

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92Mo(α,α)92Moscattering, the
Zs. Fülöp
¹
,
Gyuri Gyürky
²
,
Z. Máté
³

et al.

Abstract: 92 Mo(α,α) 92 Mo scattering, the 92 Mo-α optical potential, and the 96 Ru(γ,α) Ru(γ,α) 92 Mo reaction rates at T9 = 2.0 and T9 = 3.0 could be determined to an accuracy of about 16 % and are compared to previously published theoretical rates.

Cited by 56 publications

References 44 publications

Activation Experiments forp-Process Nucleosynthesis

Activation Experiments forp-Process Nucleosynthesis

How important is the Family? Alpha nuclear potentials and p-process nucleosynthesis

Total reaction cross sections from elasticα-nucleus scattering angular distributions around the Coulomb barrier

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Product

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About

92Mo(α,α)92Moscattering, theZs. Fülöp1, Gyuri Gyürky2, Z. Máté3 et al.

Abstract: 92 Mo(α,α) 92 Mo scattering, the 92 Mo-α optical potential, and the 96 Ru(γ,α) Ru(γ,α) 92 Mo reaction rates at T9 = 2.0 and T9 = 3.0 could be determined to an accuracy of about 16 % and are compared to previously published theoretical rates.

Cited by 56 publications

References 44 publications

Activation Experiments forp-Process Nucleosynthesis

Activation Experiments forp-Process Nucleosynthesis

How important is the Family? Alpha nuclear potentials and p-process nucleosynthesis

Total reaction cross sections from elasticα-nucleus scattering angular distributions around the Coulomb barrier

Contact Info

Product

Resources

About

92Mo(α,α)92Moscattering, the
Zs. Fülöp
¹
,
Gyuri Gyürky
²
,
Z. Máté
³

et al.