<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>96</mml:mn></mml:msup></mml:math>Zr(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>n</mml:mi><mml:mo>,</mml:mo><mml:mspace width="-0.16em" /><mml:mi>γ</mml:mi></mml:mrow></mml:math>) measurement at the n_TOF facility at CERN

Tagliente, G.; Milazzo, Paolo; Fujii, K.; Abbondanno, U.; Aerts, G.; Álvarez, H.; Álvarez‐Velarde, F.; Andriamonje, S.; Andrzejewski, J.; Audouin, L.; Badurek, G.; Baumann, P.; Bečvář, F.; Belloni, F.; Berthoumieux, E.; Calviño, F.; Calviani, M.; Cano‐Ott, D.; Capote, R.; Carrapiço, C.; Cennini, P.; Chepel, V.; Chiaveri, E.; Colonna, N.; Cortés, G.; Couture, A.; Dahlfors, M.; David, S.; Dillmann, I.; Domingo‐Pardo, C.; Dridi, W.; Durán, I.; Eleftheriadis, C.; Embid‐Segura, M.; Ferrari, A.; Ferreira‐Marques, R.; Furman, W.; Gonçalves, I. F.; González‐Romero, E.; Gramegna, F.; Guerrero, C.; Gunsing, F.; Haas, Brian J.; Haight, R. C.; Heil, M.; Herrera-Martı́nez, A.; Jericha, E.; Käppeler, F.; Kadi, Y.; Karadimos, D.; Karamanis, D.; Kerveno, M.; Kossionides, E.; Krtička, M.; Lamboudis, C.; Leeb, H.; Lindote, A.; Lopes, I.; Lukić, S.; Marganiec, J.; Marrone, S.; Martínez, T.; Massimi, C.; Mastinu, P.; Mengoni, A.; Moreau, C.; Mosconi, M.; Neves, F.; Oberhummer, H.; O’Brien, S.; Pancin, J.; Papachristodoulou, C.; Papadopoulos, C.; Paradela, C.; Patronis, N.; Pavlik, A.; Pavlopoulos, P.; Perrot, L.; Pigni, Marco T.; Plag, R.; Plompen, A.; Plukis, A.; Poch, A.; Praena, J.; Pretel, C.; Quesada, J.; Reifarth, R.; Rosetti, M.; Rubbia, C.; Rudolf, G.; Rullhusen, P.; Salgado, J.; Santos, C.; Sarchiapone, L.; Savvidis, I.; Stéphan, C.; Taín, J. L.; Tassan‐Got, L.; Tavora, L.; Terlizzi, R.; Vannini, G.; Vaz, P.; Ventura, A.; Villamarı́n, D.; Vincente, M. C.; Vlachoudis, V.; Vlastou, R.; Voß, F.; Walter, S.; Wiescher, M.; Wisshak, K.

doi:10.1103/physrevc.84.055802

Cited by 18 publications

(6 citation statements)

References 48 publications

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“…The results have been compared with the extracted resonance parameters of the stable zirconium isotopes with the parameters obtained in previous n_TOF measurements [27][28][29][30][31]. The comparison in Table III shows the very good agreement, thus confirming the isotopic composition of the sample used.…”

Section: Data Analysis and Resultssupporting

confidence: 59%

“…[12,26] at 4.121, 4.320, 5.914, and 6.641 keV were recognized as belonging to 92 Zr, 91 Zr, 27 Al, and 92 Zr, respectively. On the contrary, the high resolution of the present measurement and those of the stable zirconium isotopes with enriched samples [27][28][29][30][31] has allowed us to recognize that the resonance at 2.767 keV belongs to 93 Zr [in the past analysis [12] it was not possible to resolve this resonance and the 91 Zr one at 2.757 keV; see for instance Fig. 2(b)].…”

Section: Data Analysis and Resultsmentioning

confidence: 68%

“…To cover all possible scenarios, cross-section data should be available over a sufficiently wide neutron energy range, starting at about 100 eV and extending to about 500 keV to account for the highest temperatures reached during shell carbon burning in massive stars. [27][28][29][30][31]. All registered differences are inside experimental uncertainties.…”

Section: Maxwellian-averaged Cross Sectionsmentioning

confidence: 78%

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The93Zr(n,γ) reaction up to 8 keV neutron energy

Tagliente¹,

Milazzo²,

Fujii³

et al. 2013

Phys. Rev. C

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The (n, γ ) reaction of the radioactive isotope 93 Zr has been measured at the n_TOF high-resolution time-offlight facility at CERN. Resonance parameters have been extracted in the neutron energy range up to 8 keV, 014622-1 0556-2813/2013/87(1)/014622 (7) ©2013 American Physical Society G. TAGLIENTE et al.PHYSICAL REVIEW C 87, 014622 (2013) yielding capture widths smaller (14%) than reported in an earlier experiment. These results are important for detailed nucleosynthesis calculations and for refined studies of waste transmutation concepts.

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Section: Data Analysis and Resultssupporting

confidence: 59%

Section: Data Analysis and Resultsmentioning

confidence: 68%

Section: Maxwellian-averaged Cross Sectionsmentioning

confidence: 78%

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The93Zr(n,γ) reaction up to 8 keV neutron energy

Tagliente¹,

Milazzo²,

Fujii³

et al. 2013

Phys. Rev. C

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“…[18] was not observed, which was also absent in Ref. [19]. The resonances which do not have assignments in Ref.…”

Section: Resultsmentioning

confidence: 75%

Statistical neutron capture in the limit of low nuclear level density

et al. 2019

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A major barrier in the study of neutron-induced nuclear reactions is the impossibility of direct measurements with short-lived radioactive isotopes. For these exotic nuclei, theoretical inputs such as the Photon Strength Function (PSF) are poorly constrained. At Los Alamos National Laboratory, the Detector for Advanced Neutron Capture Experiments (DANCE) provides direct measurements of γ-ray cascades following neutron capture reactions on stable or long-lived radioactive nuclei. While Hauser-Feshbach calculations can provide reasonable predictions for neutron capture on heavy nuclei, their application to neutron-rich light nuclei with low nuclear level densities and low neutron separation energies is questionable. In this paper, we report on the γ-ray spectra from individual neutron resonances from the 96 Zr(n, γ) reaction, with an emphasis on the sensitivity of of the γ-ray spectra to different PSF models. The comparison of the measured γ-ray spectra with predicted spectra does not support the addition of a low-energy enhancement of the size reported in many charged-particle reaction measurements, but the sensitivity of the γ-ray spectra to different PSF models is weak.

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“…In Fig. 1, we show the solar main s-process component computed with an updated network as described by [4,22], further improved with new cross section measurements of 92,94,96 Zr [40,41,42], 186,187,188 Os [32], 64,70 Zn [36], Mg isotopes [31]). A plausible reproduction of all s-only isotopes (full circles) is obtained within the uncertainties.…”

Section: Introductionmentioning

confidence: 99%

Impact of Nuclear Reaction Uncertainties on AGB Nucleosynthesis Models

Bisterzo¹,

Gallino²,

Kaeppeler³

et al. 2013

Proceedings of XII International Symposium on Nuclei in the Cosmos — PoS(NIC XII)

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Asymptotic giant branch (AGB) stars with low initial mass (1 < M/M ⊙ < 3) are responsible for the production of neutron-capture elements through the main s-process (main slow neutron capture process). The major neutron source is 13 C(α, n) 16 O, which burns radiatively during the interpulse periods at ∼ 8 keV and produces a rather low neutron density (10 7 n/cm 3 ). The second neutron source 22 Ne(α, n) 25 Mg, partially activated during the convective thermal pulses when the energy reaches about 23 keV, gives rise to a small neutron exposure but a peaked neutron density (N n (peak) > 10 11 n/cm 3 ). At metallicities close to solar, it does not substantially change the final s-process abundances, but mainly affects the isotopic ratios near s-path branchings sensitive to the neutron density.We examine the effect of the present uncertainties of the two neutron sources operating in AGB stars, as well as the competition with the 22 Ne(α, γ) 26 Mg reaction. The analysis is carried out on the main-s process component (reproduced by an average between M AGB ini = 1.5 and 3 M ⊙ at half solar metallicity, see [3]), using a set of updated nucleosynthesis models. Major effects are seen close to the branching points. In particular, 13 C(α, n) 16 O mainly affects 86 Kr and 87 Rb owing to the branching at 85 Kr, while small variations are shown for heavy isotopes by decreasing or increasing our adopted rate by a factor of 2-3. By changing our 22 Ne(α, n) 25 Mg rate within a factor of 2, a plausible reproduction of solar s-only isotopes is still obtained. We provide a general overview of the major consequences of these variations on the s-path. A complete description of each branching will be presented in Bisterzo et al., in preparation.

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96Zr(n,γ) measurement at the n_TOF facility at CERN

Abstract: The (n,γ ) cross section of 96 Zr has been investigated at the CERN n TOF spallation neutron source. Highresolution time-of-flight measurements using an enriched

Cited by 18 publications

References 48 publications

The93Zr(n,γ) reaction up to 8 keV neutron energy

The93Zr(n,γ) reaction up to 8 keV neutron energy

Statistical neutron capture in the limit of low nuclear level density

Impact of Nuclear Reaction Uncertainties on AGB Nucleosynthesis Models

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