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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
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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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Measurement of $^{73}$Ge($n,γ$) cross sections and implications for stellar nucleosynthesis
/ n_TOF Collaboration
$^{73}$Ge($n,γ$) cross sections were measured at the neutron time-of-flight facility n_TOF at CERN up to neutron energies of 300 keV, providing for the first time experimental data above 8 keV. Results indicate that the stellar cross section at kT = 30 keV is 1.5 to 1.7 times higher than most theoretical predictions. [...]
arXiv:1901.10207.-
2019-03-10 - 8 p.
Article from SCOAP3: PDF; Fulltext: PDF;
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Development of a novel segmented mesh MicroMegas detector for neutron beam profiling
/ Diakaki, M (IRFU, Saclay ; CERN) ; Berthoumieux, E (IRFU, Saclay) ; Papaevangelou, T (IRFU, Saclay) ; Gunsing, F (IRFU, Saclay) ; Tsiledakis, G (IRFU, Saclay) ; Dupont, E (IRFU, Saclay) ; Anvar, S (IRFU, Saclay) ; Audouin, L (Orsay, IPN) ; Aznar, F (Zaragoza U. ; U. Zaragoza (main)) ; Belloni, F (IRFU, Saclay ; Geel, JRC) et al.
A novel MicroMegas detector based on microbulk technology with an embedded XY strip structure was developed, obtained by segmenting both the mesh and the anode in perpendicular directions. This results in a very low-mass device with good energy and spatial resolution capabilities. [...]
2018 - 10 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 903 (2018) 46-55
Fulltext: PDF; Fulltext from Publisher: PDF;
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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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Interfacing Geant4, Garfield++ and Degrad for the Simulation of Gaseous Detectors
/ Pfeiffer, Dorothea (ESS, Lund ; CERN) ; De Keukeleere, Lennert (KU Leuven, Dept. Phys. Astron.) ; Azevedo, Carlos (Aveiro U.) ; Belloni, Francesca (Saclay) ; Biagi, Stephen (Liverpool U.) ; Grichine, Vladimir (Lebedev Inst.) ; Hayen, Leendert (KU Leuven, Dept. Phys. Astron.) ; Hanu, Andrei R. (NASA, Goddard) ; Hřivnáčová, Ivana (Orsay, IPN) ; Ivanchenko, Vladimir (CERN ; Tomsk State U.) et al.
For several years, attempts have been made to interface Geant4 and other software packages with the aim of simulating the complete response of a gaseous particle detector. In such a simulation, Geant4 is always responsible for the primary particle generation and the interactions that occur in the non-gaseous detector material. [...]
arXiv:1806.05880.-
2019-08-11 - 14 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 935 (2019) 121-134
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