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$^{92}$Zr($n,\gamma$) and ($n$,tot) measurements at the GELINA and n_TOF facilities
/ n_TOF Collaboration
Background: Stellar nucleosynthesis of elements heavier than iron is driven by neutron capture processes. 92Zr
is positioned at a strategic point along the slow nucleosynthesis path, given its proximity to the neutron magic
number N = 50 and its position at the matching region between the weak and main slow processes.
Purpose: In parallel with recent improved astronomical data, the extraction of accurate Maxwellian averaged
cross sections (MACSs) derived from a more complete and accurate set of resonance parameters should allow
for a better understanding of the stellar conditions at which nucleosynthesis takes place.
Methods: Transmission and capture cross section measurements using enriched 92Zr metallic samples were
performed at the time-of flight facilities GELINA of JRC-Geel (BE) and n_TOF of CERN (CH). [...]
2022 - 14 p.
- Published in : Phys. Rev. C 105 (2022) 025805
Fulltext: PDF;
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Measurement and analysis of the $^{241}$Am neutron capture cross section at the n_TOF facility at CERN
/ Mendoza, E (Madrid, CIEMAT) ; Cano-Ott, D (Madrid, CIEMAT) ; Altstadt, S (Goethe U., Frankfurt (main)) ; Andriamonje, S (IRFU, Saclay) ; Andrzejewski, J (Lodz U.) ; Audouin, L (Orsay, IPN) ; Balibrea, J (Madrid, CIEMAT) ; Bécares, V (Madrid, CIEMAT) ; Barbagallo, M (INFN, Bari) ; Bečvář, F (Charles U.) et al.
/n_TOF
The Am241(n,γ) cross section has been measured at the n_TOF facility at CERN with the n_TOF BaF2 Total Absorption Calorimeter in the energy range between 0.2 eV and 10 keV. Our results are analyzed as resolved resonances up to 700 eV, allowing a more detailed description of the cross section than in the current evaluations, which contain resolved resonances only up to 150–160 eV. [...]
2018 - 21 p.
- Published in : Phys. Rev. C 97 (2018) 054616
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Measurement and resonance analysis of the $^{33}\mathrm{S}(n,\alpha)^{30}\mathrm{Si}$ cross section at the CERN n_TOF facility in the energy region from 10 to 300 keV
/ Praena, J (CAFPE, Granada) ; Sabaté-Gilarte, M (Seville U. ; CERN) ; Porras, I (CAFPE, Granada) ; Quesada, J M (Seville U.) ; Altstadt, S (Frankfurt U.) ; Andrzejewski, J (Lodz U.) ; Audouin, L (Orsay, IPN) ; Bécares, V (Madrid, CIEMAT) ; Barbagallo, M (INFN, Bari) ; Bečvář, F (Charles U.) et al.
/n_TOF
The S33(n,α)Si30 cross section has been measured at the neutron time-of-flight (n_TOF) facility at CERN in the neutron energy range from 10 to 300 keV relative to the B10(n,α)Li7 cross-section standard. Both reactions were measured simultaneously with a set of micromegas detectors. [...]
2018 - 10 p.
- Published in : Phys. Rev. C 97 (2018) 064603
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Preparation and characterization of $^{33}$S samples for $^{33}$S(n,$\alpha$) $^{30}$Si cross-section measurements at the n_TOF facility at CERN
/ Praena, J (Granada U.) ; Ferrer, F J (CNA, Seville) ; Vollenberg, W (CERN) ; Sabaté-Gilarte, M (Seville U. ; CERN) ; Fernández, B (CNA, Seville ; Seville U.) ; García-López, J (CNA, Seville ; Seville U.) ; Porras, I (Granada U.) ; Quesada, J M (Seville U.) ; Altstadt, S (Goethe U., Frankfurt (main)) ; Andrzejewski, J (Lodz U.) et al.
/n_TOF
Thin 33 S samples for the study of the 33 S(n, α ) 30 Si cross-section at the n_TOF facility at CERN were made by thermal evaporation of 33 S powder onto a dedicated substrate made of kapton covered with thin layers of copper, chromium and titanium. This method has provided for the first time bare sulfur samples a few centimeters in diameter. [...]
2018 - 6 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 890 (2018) 142-147
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Measurement of the neutron capture cross section of the fissile isotope $^{235}$U with the CERN n_TOF total absorption calorimeter and a fission tagging based on micromegas detectors
/ Balibrea-Correa, J (Madrid, CIEMAT) ; Mendoza, E (Madrid, CIEMAT) ; Cano-Ott, D (Madrid, CIEMAT) ; Krtička, M (Charles U., Prague (main)) ; Altstadt, S (Goethe U., Frankfurt (main)) ; Andrzejewski, J (U. Lodz (main)) ; Audouin, L (Orsay, IPN) ; Bécares, V (Madrid, CIEMAT) ; Barbagallo, M (INFN, Bari) ; Bečvář, F (Charles U., Prague (main)) et al.
/n_TOF
The accuracy on neutron capture cross section of fissile isotopes must be improved for the design of future nuclear systems such as Gen-IV reactors and Accelerator Driven Systems. The High Priority Request List of the Nuclear Energy Agency, which lists the most important nuclear data requirements, includes also the neutron capture cross sections of fissile isotopes such as $^{233,235}$U and $^{239,241}$Pu. [...]
2017 - 4 p.
- Published in : EPJ Web Conf. 146 (2017) 11021
Fulltext: PDF;
In : ND 2016 International Conference on Nuclear Data for Science and Technology, Bruges, Belgium, 11 - 16 Sep 2016, pp.11021
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