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The Nuclear Astrophysics program at n_TOF (CERN)
/ Colonna, N (INFN, Bari) ; Aberle, O (CERN) ; Andrzejewski, J (U. Lodz (main)) ; Audouin, L (Orsay, IPN) ; Bacak, M (Vienna, Tech. U. ; CERN ; IRFU, Saclay) ; Balibrea, J (Madrid, CIEMAT) ; Barbagallo, M (INFN, Bari) ; Bečvář, F (Charles U.) ; Berthoumieux, E (IRFU, Saclay) ; Billowes, J (Manchester U.) et al.
/n_TOF
An important experimental program on Nuclear Astrophysics is being carried out at the n_TOF since several years, in order to address the still open issues in stellar and primordial nucleosynthesis. Several neutron capture reactions relevant to s-process nucleosynthesis have been measured so far, some of which on important branching point radioisotopes. [...]
2017 - 8 p.
- Published in : EPJ Web Conf. 165 (2017) 01014
Fulltext: PDF;
In : 8th Nuclear Physics in Astrophysics, Catania, Italy, June 18-23, 2017, pp.01014
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Experiments with neutron beams for the astrophysical s process
/ Lederer, C (Frankfurt U. ; Vienna U. ; Edinburgh U.) ; Altstadt, S (Frankfurt U.) ; Andrzejewski, J (Lodz U.) ; Audouin, L (Orsay, IPN) ; Barbagallo, M (INFN, Bari) ; Bécares, V (Madrid, CIEMAT) ; Bečvář, F (Charles U.) ; Belloni, F (Saclay) ; Berthoumieux, E (Saclay ; CERN) ; Billowes, J (Manchester U.) et al.
Neutron capture cross sections are the key nuclear physics input to study the slow neutron capture process, which is responsible for forming about half of the elemental abundances above Fe. Stellar neutron capture cross section can be measured by the time-of-flight technique, or by activation. [...]
2016
- Published in : J. Phys.: Conf. Ser. 665 (2016) 012020
Fulltext: PDF;
In : 6th Nuclear Physics in Astrophysics and 26th International Nuclear Physics Divisional Conference of the European Physical Society, Lisbon, Portugal, 19 - 24 May 2013, pp.012020
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High-accuracy determination of the neutron flux in the new experimental area n_TOF-EAR2 at CERN
/ Sabaté-Gilarte, M (CERN ; Seville U.) ; Barbagallo, M (INFN, Bari) ; Colonna, N (INFN, Bari) ; Gunsing, F (IRFU, Saclay) ; Žugec, P (Zagreb U., Phys. Dept.) ; Vlachoudis, V (CERN) ; Chen, Y H (Orsay, IPN) ; Stamatopoulos, A (Natl. Tech. U., Athens) ; Lerendegui-Marco, J (Seville U.) ; Cortés-Giraldo, M A (Seville U.) et al.
A new high flux experimental area has recently become operational at the n_TOF facility at CERN. This new measuring station, n_TOF-EAR2, is placed at the end of a vertical beam line at a distance of approximately 20m from the spallation target. [...]
2017 - 13 p.
- Published in : Eur. Phys. J. A 53 (2017) 210
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Experimental setup and procedure for the measurement of the $^7$Be(n,p)$^7$Li reaction at n_TOF
/ n_TOF Collaboration
Following the completion of the second neutron beam line and the related experimental area (EAR2) at the n_TOF spallation neutron source at CERN, several experiments were planned and performed. The high instantaneous neutron flux available in EAR2 allows to investigate neutron indiced reactions with charged particles in the exit channel even employing targets made out of small amounts of short-lived radioactive isotopes. [...]
arXiv:1708.01178; CERN-EP-DRAFT-MISC-2017-002; CERN-EP-2018-008; CERN-EP-2018-008.-
Geneva : CERN, 2018-04-11 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 887 (2018) 27-33
Fulltext: CERN-EP-DRAFT-MISC-2017-002 - PDF; 10.1016_j.nima.2017.12.025 - PDF; arXiv:1708.01178 - PDF;
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Neutron spectroscopy of $^{26}$Mg states: constraining the stellar neutron source $^{22}$Ne($\alpha, n$)$^{25}$Mg
/ Massimi, C. (INFN, Bologna ; Bologna U.) ; Altstadt, S. (Frankfurt U.) ; Andrzejewski, J. (Lodz U.) ; Audouin, L. (Orsay, IPN) ; Barbagallo, M. (INFN, Bari) ; Bécares, V. (Madrid, CIEMAT) ; Bečvář, F. (Charles U.) ; Belloni, F. (IRFU, Saclay) ; Berthoumieux, E. (IRFU, Saclay) ; Billowes, J. (Manchester U.) et al.
/n_TOF
This work reports on accurate, high-resolution measurements of the $^{25}$Mg($n, \gamma$)$^{26}$Mg and $^{25}$Mg($n, tot$) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved $^{25}$Mg($n, \gamma$)$^{26}$Mg parametrization. The relevant resonances for $n+^{25}$Mg were characterized from a combined R-matrix analysis of the experimental data. [...]
arXiv:1702.04520.-
2017-05-10 - 6 p.
- Published in : Phys. Lett. B 768 (2017) 1–6
Article from SCOAP3: PDF; Fulltext: PDF;
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The new vertical neutron beam line at the CERN n_TOF facility design and outlook on the performance
/ n_TOF Collaboration
At the neutron time-of-flight facility n_TOF at CERN a new vertical beam line was constructed in 2014, in order to extend the experimental possibilities at this facility to an even wider range of challenging cross-section measurements of interest in astrophysics, nuclear technology and medical physics. The design of the beam line and the experimental hall was based on FLUKA Monte Carlo simulations, aiming at maximizing the neutron flux, reducing the beam halo and minimizing the background from neutrons interacting with the collimator or back-scattered in the beam dump..
2015 - 9 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 799 (2015) 90-98
Elsevier Open Access article: PDF;
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Spin Measurements of n+Sr-87 for Level Density Studies
/ Gunsing, F (Saclay) ; Fraval, K (Saclay) ; Mathelie, M (Saclay) ; Valenta, S (Charles U., Prague (main)) ; Bečvář, F (Charles U., Prague (main)) ; Rusev, G (TUNL, Durham ; Duke U.) ; Tonchev, A P (Duke U. ; TUNL, Durham) ; Mitchell, G (NCSU, Raleigh ; TUNL, Durham) ; Baramsai, B (TUNL, Durham ; NCSU, Raleigh) ; Altstadt, S (Frankfurt U.) et al.
We have used the 4 pi BaF2 gamma-ray detector array at the n\_TOF neutron time-of-flight facility at CERN for an experiment in order to determine the spins of resonances of n+Sr-87 by measuring the gamma-ray spectra and multiplicity distributions. The first results are presented here. [...]
2014 - 5.
- Published in : Nucl. Data Sheets 119 (2014) 132-136
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