J. Andrzejewski
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View article: Measurement of the $^{35}Cl(n, p)^{35}S$ cross-section at the CERN n\_TOF facility from subthermal energy to 120 keV
Measurement of the $^{35}Cl(n, p)^{35}S$ cross-section at the CERN n\_TOF facility from subthermal energy to 120 keV Open
Background: The $^{35}Cl(n, p)^{35}S$ reaction is of special interest in three different applications. First, in Boron Neutron Capture Therapy due to the presence of $^{35}Cl$ in brain and skin tissue. Second, it is involved in the creatio…
View article: New measurement of $^{50}$Cr and $^{53}$Cr (n,$γ$) cross sections at n_TOF: a call for chromium nuclear data revision
New measurement of $^{50}$Cr and $^{53}$Cr (n,$γ$) cross sections at n_TOF: a call for chromium nuclear data revision Open
$^{50}$Cr and $^{53}$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 $k_{eff}$ and $k_{…
View article: Recent highlights and prospects on (n,<i>γ</i>) measurements at the CERN n_TOF facility
Recent highlights and prospects on (n,<i>γ</i>) measurements at the CERN n_TOF facility Open
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 radia…
View article: Measurement and analysis of the $$^{246}$$Cm and $$^{248}$$Cm neutron capture cross-sections at the EAR2 of the n_TOF facility at CERN
Measurement and analysis of the $$^{246}$$Cm and $$^{248}$$Cm neutron capture cross-sections at the EAR2 of the n_TOF facility at CERN Open
The $$^{246}$$ Cm(n, $$\gamma $$ ) and $$^{248}$$ Cm(n, $$\gamma $$ ) cross-sections have been measured at the Experimental Area 2 (EAR2) of the n_TOF facility at CERN with three C $$_6$$ D $$_6$$ detectors. This measuremen…
View article: Radiative neutron capture cross section of $^{242}$Pu measured at n_TOF-EAR1 in the unresolved resonance region up to 600 keV
Radiative neutron capture cross section of $^{242}$Pu measured at n_TOF-EAR1 in the unresolved resonance region up to 600 keV Open
The design of fast reactors burning MOX fuels requires accurate capture and fission cross sections. For the particular case of neutron capture on 242Pu, the NEA recommends that an accuracy of 8-12% should be achieved in the fast energy reg…
View article: Shedding Light on the Origin of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Pb</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>204</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>, the Heaviest <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:math>-Process–Only Isotope in the Solar System
Shedding Light on the Origin of , the Heaviest -Process–Only Isotope in the Solar System Open
Asymptotic giant branch stars are responsible for the production of most of the heavy isotopes beyond Sr observed in the solar system. Among them, isotopes shielded from the r-process contribution by their stable isobars are defined as s-o…
View article: Measurement and analysis of the $^{246}$Cm and $^{248}$Cm neutron capture cross-sections at the EAR2 of the n TOF facility
Measurement and analysis of the $^{246}$Cm and $^{248}$Cm neutron capture cross-sections at the EAR2 of the n TOF facility Open
The $^{246}$Cm(n,$\gamma$) and $^{248}$Cm(n,$\gamma$) cross-sections have been measured at the Experimental Area 2 (EAR2) of the n_TOF facility at CERN with three C$_6$D$_6$ detectors. This measurement is part of a collective effort to imp…
View article: Measurement of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Ce</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>140</mml:mn></mml:mrow></mml:mmultiscripts><mml:mo stretchy="false">(</mml:mo><mml:mi mathvariant="normal">n</mml:mi><mml:mo>,</mml:mo><mml:mi>γ</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math> Cross Section at n_TOF and Its Astrophysical Implications for the Chemical Evolution of the Universe
Measurement of the Cross Section at n_TOF and Its Astrophysical Implications for the Chemical Evolution of the Universe Open
Ce140(n,γ) is a key reaction for slow neutron-capture (s-process) nucleosynthesis due to being a bottleneck in the reaction flow. For this reason, it was measured with high accuracy (uncertainty ≈5%) at the n_TOF facility, with an unpreced…
View article: The n_TOF facility at CERN
The n_TOF facility at CERN Open
The neutron Time-of-Flight (TOF) research facility at CERN, n_TOF, has been a pioneering platform for neutron cross-section measurements since its inception in 2001. It boasts three distinct experimental areas, each tailored to address a s…
View article: The n_TOF facility at CERN
The n_TOF facility at CERN Open
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 Lon…
View article: Description and outlook of the <sup>50,53</sup>Cr(n,γ) cross section measurement at n_TOF and HiSPANoS
Description and outlook of the <sup>50,53</sup>Cr(n,γ) cross section measurement at n_TOF and HiSPANoS Open
Chromium is a very relevant element regarding criticality safety in nuclear reactors because of its presence in stainless steel, an important structural material. Currently, there are serious discrepancies between the different evaluations…
View article: Experimental setup of the <sup>239</sup>Pu neutron capture and fission cross-section measurements at n_TOF, CERN
Experimental setup of the <sup>239</sup>Pu neutron capture and fission cross-section measurements at n_TOF, CERN Open
The experimental setup of the new measurement of 239 Pu fission and capture cross-section in the n_TOF time-of-flight facility at CERN is presented. The measurement aims to address the needs and demands of nuclear data users. The experimen…
View article: Pushing the high count rate limits of scintillation detectors for challenging neutron-capture experiments
Pushing the high count rate limits of scintillation detectors for challenging neutron-capture experiments Open
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 t…
View article: The neutron time-of-flight facility n_TOF at CERN Recent facility upgrades and detector developments
The neutron time-of-flight facility n_TOF at CERN Recent facility upgrades and detector developments Open
Based on an idea by Carlo Rubbia, the n_TOF facility at CERN has been operating for over 20 years. It is a neutron spallation source, driven by the 20 GeV/c proton beam from the CERN PS accelerator. Neutrons in a very wide energy range (fr…
View article: Measurement of the <sup>241</sup>Am(n,γ) cross section at the n_TOF facility at CERN
Measurement of the <sup>241</sup>Am(n,γ) cross section at the n_TOF facility at CERN Open
The neutron capture cross section of 241 Am is an important quantity for nuclear energy production and fuel cycle scenarios. Several measurements have been performed in recent years with the aim to reduce existing uncertainties in evaluate…
View article: New detection systems for an enhanced sensitivity in key stellar (n,γ) measurements
New detection systems for an enhanced sensitivity in key stellar (n,γ) measurements Open
Neutron capture cross-section measurements are fundamental in the study of astrophysical phenomena, such as the slow neutron capture (s-) process of nucleosynthesis operating in red-giant and massive stars. However, neutron capture measure…
View article: The n_TOF NEAR Station Commissioning and first physics case
The n_TOF NEAR Station Commissioning and first physics case Open
The NEAR Station is a new experimental area developed at the n_TOF Facility at CERN. The activation station of NEAR underwent a characterization of the beam following the installation of the new n_TOF Spallation Target. The commissioning o…
View article: The Stellar <sup>72</sup>Ge(n, γ) Cross Section for weak s-process: A First Measurement at n_TOF
The Stellar <sup>72</sup>Ge(n, γ) Cross Section for weak s-process: A First Measurement at n_TOF Open
The slow neutron capture process ( s -process) is responsible for producing about half of the elemental abundances heavier than iron in the universe. Neutron capture cross sections on stable isotopes are a key nuclear physics input for s -…
View article: First measurement of the <sup>94</sup>Nb(<i>n</i>,<i>γ</i>) cross section at the CERN n_TOF facility
First measurement of the <sup>94</sup>Nb(<i>n</i>,<i>γ</i>) cross section at the CERN n_TOF facility Open
One of the crucial ingredients for the improvement of stellar models is the accurate knowledge of neutron capture cross-sections for the different isotopes involved in the s -, r - and i - processes. These measurements can shed light on ex…
View article: Results of the <sup>244</sup>Cm, <sup>246</sup>Cm and <sup>248</sup>Cm neutron-induced capture cross sections measurements at EAR1 and EAR2 of the n_TOF facility
Results of the <sup>244</sup>Cm, <sup>246</sup>Cm and <sup>248</sup>Cm neutron-induced capture cross sections measurements at EAR1 and EAR2 of the n_TOF facility Open
Accurate neutron capture cross section data for minor actinides (MAs) are required to estimate the production and transmutation rates of MAs in light water reactors, critical fast reactors like Gen-IV systems, and other innovative reactor …
View article: New perspectives for neutron capture measurements in the upgraded CERN-n_TOF Facility
New perspectives for neutron capture measurements in the upgraded CERN-n_TOF Facility Open
The n_TOF facility has just undergone in 2021 a major upgrade with the installation of its third generation spallation target that has been designed to optimize the performance of the two n_TOF time-of-flight lines. This contribution descr…
View article: Overview of the dissemination of n_TOF experimental data and resonance parameters
Overview of the dissemination of n_TOF experimental data and resonance parameters Open
The n_TOF neutron time-of-flight facility at CERN is used for nuclear data measurements. The n_TOF Collaboration works closely with the Nuclear Reaction Data Centres (NRDC) network to disseminate the experimental data through the internati…
View article: Characterisation of the n_TOF 20 m beam line at CERN with the new spallation target
Characterisation of the n_TOF 20 m beam line at CERN with the new spallation target Open
The n_TOF facility hosts CERN’s pulsed neutron source, comprising two beam lines of different flight paths and one activation station. It is based on a proton beam delivered by the PS accelerator impinging on a lead spallation target. Duri…