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CERN Document Server 39 notices trouvées  1 - 10suivantfin  aller vers la notice: La recherche a duré 0.66 secondes. 
1.
Radiative neutron capture cross section of $^{242}$Pu measured at n_TOF-EAR1 in the unresolved resonance region up to 600 keV / n_TOF Collaboration
The design of fast reactors burning MOX fuels requires accurate capture and fission cross sections. [...]
arXiv:2412.01332.
- 20.
Fulltext
2.
Shedding Light on the Origin of Pb204, the Heaviest s-Process–Only Isotope in the Solar System / n_TOF Collaboration
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-only nuclei. [...]
2024 - 8 p. - Published in : Phys. Rev. Lett. 133 (2024) 052702 Fulltext: PDF;
3.
$^{74}$Ge($n,\gamma $) cross section below 70 keV measured at n_TOF CERN / n_TOF Collaboration
Neutron capture reaction cross sections on $^{74}$Ge are of importance to determine $^{74}$Ge production during the astrophysical slow neutron capture process. We present new resonance data on $^{74}$Ge($n,\gamma $) reactions below 70 keV neutron energy. [...]
2022 - 9 p. - Published in : Eur. Phys. J. A 58 (2022) 239 Fulltext: PDF;
4.
$^{7}$ Be(n,p)$^{7}$ Li Cross Section Measurement for the Cosmological Lithium Problem at the n $\_$ TOF Facility at CERN / n_TOF Collaboration
One of the most puzzling problems in Nuclear Astrophysics is the “Cosmological Lithium Problem”, i.e the discrepancy between the primordial abundance of$^{7}$ Li observed in metal poor halo stars (Asplund et al. in Astrophys J 644:229–259, 2006, [1]), and the one predicted by Big Bang Nucleosynthesis (BBN). [...]
2019 - 8 p. - Published in : Springer Proc. Phys. 219 (2019) 25-32
In : Nuclei in the Cosmos XV (NIC XV), Assergi, Italy, 24 - 29 Jun 2018, pp.25-32
5.
Radiative Neutron Capture Cross-Section Measurement of Ge Isotopes at n_TOF CERN Facility and Its Importance for Stellar Nucleosynthesis / n_TOF Collaboration
This manuscript summarizes the results of radiative neutron capture cross-section measurements on two stable germanium isotopes, $^{70}$Ge and $^{73}$Ge. Experiments were performed at the n_TOF facility at CERN via the time-of-flight technique, over a wide neutron energy range, for all stable germanium isotopes (70,72,73,74, and 76). [...]
2021 - 6 p. - Published in : Acta Phys. Pol. A 139 (2021) 383-388 Fulltext: PDF;
In : 46th Extraordinary Congress of the Polish Physical Society, Warsaw, Poland, 16 - 18 Oct 2020, pp.383-388
6.
$^{92}$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;
7.
Measurement of the $^{76}\mathrm{Ge}(n,{\gamma})$ cross section at the n_TOF facility at CERN / n_TOF Collaboration
The $^{76}\mathrm{Ge}(n,{\gamma})$ reaction has been measured at the n_TOF facility at CERN via the time-of-flight technique. Neutron capture cross sections on $^{76}$Ge are of interest to a variety of low-background experiments, such as neutrinoless double β decay searches, and to nuclear astrophysics. [...]
2021 - 7 p. - Published in : Phys. Rev. C 104 (2021) 044610 Fulltext: PDF;
8.
Measurement of the $^{242}$Pu(n,$\gamma$) cross section from thermal to 500 keV at the Budapest research reactor and CERN n_TOF-EAR1 facilities / n_TOF Collaboration
The design and operation of innovative nuclear systems requires a better knowledge of the capture and fission cross sections of the Pu isotopes. For the case of capture on $^{242}$Pu, a reduction of the uncertainty in the fast region down to 8-12% is required. [...]
2020 - 6 p. - Published in : EPJ Web Conf. 239 (2020) 01019 fulltext from publisher: PDF;
In : International Conference on Nuclear Data for Science and Technology (ND 2019), Beijing, China, 19 - 24 May 2019, pp.01019
9.
Neutron Capture Cross Section for $^{10}\mathrm{Be}$ / Volknandt, M (Goethe U., Frankfurt (main)) ; Eberhardt, K (Mainz U.) ; Endres, A (Goethe U., Frankfurt (main)) ; Erbacher, P (Goethe U., Frankfurt (main)) ; Fix, M (Goethe U., Frankfurt (main)) ; Göbel, K (Goethe U., Frankfurt (main)) ; Heftrich, T (Goethe U., Frankfurt (main)) ; Heinitz, S (PSI, Villigen) ; Hrivula, E (Goethe U., Frankfurt (main)) ; Junghans, A et al.
The determination of the involved reaction cross sections is essential for the understanding of how the big bang nucleosynthesis and nuclear reactions in stars contribute to the observed abundances. One of those, which has not been measured so far, is the $^{10}\mathrm{Be(n,\gamma)}$ cross section. [...]
2020 - 6 p. - Published in : J. Phys.: Conf. Ser. 1668 (2020) 012048 fulltext: PDF;
In : 9th Nuclear Physics in Astrophysics, Frankfurt, Germany, 15 - 20 Sep 2019, pp.012048
10.
Measurement of the $\alpha$ ratio and $(n,\gamma)$ cross section of $^{235}\mathrm{U}$ from 0.2 to 200 eV at n_TOF / n_TOF Collaboration
We measured the neutron capture-to-fission cross-section ratio (α ratio) and the capture cross section of U235 between 0.2 and 200 eV at the n_TOF facility at CERN. The simultaneous measurement of neutron-induced capture and fission rates was performed by means of the n_TOF BaF2 Total Absorption Calorimeter (TAC), used for detection of γ rays, in combination with a set of micromegas detectors used as fission tagging detectors. [...]
2020 - 18 p. - Published in : Phys. Rev. C 102 (2020) 044615 Fulltext: PDF;

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37 Heftrich, T
4 Heftrich, Tanja
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