J. Plaza del Olmo

First Nb 94 ( n , γ ) Measurement: Constraining the Nucleosynthetic Origin of Mo 94 in Presolar Grains

J. Balibrea-Correa, J. Lerendegui-Marco, C. Domingo-Pardo, V. Babiano-Suarez et autres

Isotopic measurements of presolar silicon carbide grains from dying stars have revealed a puzzling overabundance of ^{94}Mo that stellar nucleosynthesis models have failed to reproduce for two decades. This discrepancy challenged our understanding of the slow neutron-capture process (s-process) that forges approximately …

es, cz, it, de, ch, fr, pl, gb, ro, hr, gr, pt, be, at, jp (code pays fourni par la source)

Environmental $γ$-Ray Flux in Hall C at LNGS and Its Correlation with Radon Activity

L. Luzzi, R. Santorelli, G. Zuzel, P. Agnes et autres

We report a comprehensive measurement of the environmental $γ$-ray flux in Hall C of the Gran Sasso National Laboratory. A spatial mapping of the radiation was carried out using a high-purity germanium detector mounted on a movable cart and deployed at eight …

First $^{94}$Nb($n,γ$) Measurement: Constraining the Nucleosynthetic Origin of $^{94}$Mo in Presolar Grains

J. Balibrea-Correa, J. Lerendegui-Marco, C. Domingo-Pardo, V. Babiano-Suarez et autres

Isotopic measurements of presolar silicon carbide grains from dying stars have revealed a puzzling overabundance of $^{94}$Mo that stellar nucleosynthesis models have failed to reproduce for two decades. This discrepancy challenged our understanding of the slow neutron-capture process ($s$-process) that forges approximately …

First $^{94}$Nb($n,γ$) Measurement: Constraining the Nucleosynthetic Origin of $^{94}$Mo in Presolar Grains

J. Balibrea-Correa, J. Lerendegui-Marco, C. Domingo-Pardo, V. Babiano-Suarez et autres

Isotopic measurements of presolar silicon carbide grains from dying stars have revealed a puzzling overabundance of $^{94}$Mo that stellar nucleosynthesis models have failed to reproduce for two decades. This discrepancy challenged our understanding of the slow neutron-capture process ($s$-process) that forges approximately …

es, it, de, us, ch, fr, pl, gb, ro, hr, gr, be, at, jp, cz (code pays fourni par la source)

New measurement of $$^{50}$$Cr and $$^{53}$$Cr (n,$$\gamma $$) cross sections at n_TOF: a call for chromium nuclear data revision

P. Pérez-Maroto, C. Guerrero, A. Casanovas, B Fernández et autres

Abstract $$^{50}$$ 50 Cr and $$^{53}$$ 53 Cr are very relevant in criticality safety benchmarks related to nuclear reactors. The discrepancies of up to 30% between the neutron capture cross section evaluations have an important effect on the $$k_{eff}$$ k eff and …

es, at, ch, it, pl, gb, fr, de, ro, hr, gr, pt, be, jp, cz (code pays fourni par la source)

Measurement of the 235U fission cross section relative to the standard 10B(n, α ) reaction at the CERN n_TOF facility: Results for E n < 2 eV

V. Michalopoulou, Μ. Diakaki, N. Kyritsis, Michael Kokkoris et autres

The neutron induced fission of 235 U is a very important reaction for nuclear technology applications and for the design of future systems to produce clean and safe energy. In addition, it is used as a reference reaction for neutron cross-section measurements, …

gr, ch, es, it, pl, fr, de, ro, hr, gb, at, be, cz, se (code pays fourni par la source)

Recent highlights and prospects on (n,γ) measurements at the CERN n_TOF facility

J. Lerendegui-Marco, V. Alcayne, V. Babiano-Suarez, M. Bacak et autres

Neutron capture cross-section measurements are fundamental in the study of the slow neutron capture (s-) process of nucleosynthesis and for the development of innovative nuclear technologies. One of the best suited methods to measure radiative neutron capture (n,γ) cross sections over the …

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Towards a new generation of solid total-energy detectors for neutron-capture time-of-flight experiments with intense neutron beams

J. Balibrea-Correa, V. Babiano-Suarez, J. Lerendegui-Marco, C. Domingo-Pardo et autres

Challenging neutron-capture cross-section measurements of small cross sections and samples with a very limited number of atoms require high-flux time-of-flight facilities. In turn, such facilities need innovative detection setups that are fast, have low sensitivity to neutrons, can quickly recover from the …

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Towards a new generation of solid total-energy detectors for neutron-capture time-of-flight experiments with intense neutron beams

J. Balibrea-Correa, V. Babiano-Suarez, J. Lerendegui-Marco, C. Domingo-Pardo et autres

Challenging neutron-capture cross-section measurements of small cross sections and samples with a very limited number of atoms require high-flux time-of-flight facilities. In turn, such facilities need innovative detection setups that are fast, have low sensitivity to neutrons, can quickly recover from the …

Multi-section fission ionization chamber for measurement of 239Pu(n,γ) reaction in fission tagging method

J. Perkowski, V. Alcayne, J. Andrzejewski, Daniel Cano-Ott et autres

The 239Pu(n,γ) reaction cross section is very important for operation of both thermal and fast reactors, when loaded with MOX fuels. According to the NEA/OECD High Priority Request List the precision of cross section data for this reaction should be improved. The …

Pushing the high count rate limits of scintillation detectors for challenging neutron-capture experiments

J. Balibrea-Correa, J. Lerendegui-Marco, V. Babiano-Suárez, C. Domingo‐Pardo et autres

One of the critical aspects for the accurate determination of neutron capture cross sections when combining time-of-flight and total energy detector techniques is the characterization and control of systematic uncertainties associated to the measuring devices. In this work we explore the most …

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The n_TOF facility at CERN

G. Tagliente, O. Aberle, V. Alcayne, S. Amaducci et autres

The neutron Time-of-Flight facility (n_TOF) is an innovative facility operative since 2001 at CERN, with three experimental areas. In this paper the n_TOF facility will be described, together with the upgrade of the facility during the Long Shutdown 2 at CERN. The …

it, ch, es, pl, fr, de, ro, hr, gr, gb, at, be, cz, se (code pays fourni par la source)