Buscar
Mostrando ítems 21-30 de 84
Artículo
7Be(n, p) 7Li Reaction and the Cosmological Lithium Problem: Measurement of the Cross Section in a Wide Energy Range at n_TOF at CERN
(APS Physics, 2018-07-24)
We report on the measurement of the 7Be(n,p)7Li cross section from thermal to approximately 325 keV neutron energy, performed in the high-flux experimental area (EAR2) of the n_TOF facility at CERN. This reaction plays a ...
Artículo
First results of the 230Th(n,f) cross section measurements at the CERN n_TOF facility
(EDP Sciences, 2020)
The study of neutron-induced reactions on actinides is of considerable importance for the design of advanced nuclear systems and alternative fuel cycles. Specifically, 230Th is produced from the α-decay of 234U as a byproduct ...
Artículo
First Measurement of Several β-Delayed Neutron Emitting Isotopes Beyond N=126
(American Physical Society, 2016)
The β-delayed neutron emission probabilities of neutron rich Hg and Tl nuclei have been measured together with β-decay half-lives for 20 isotopes of Au, Hg, Tl, Pb, and Bi in the mass region N≳126. These are the heaviest ...
Artículo
Monte carlo simulations of the n-TOF lead spallation target with the Geant4 toolkit: A benchmark study
(EDP Sciences, 2017)
Monte Carlo (MC) simulations are an essential tool to determine fundamental features of a neutron beam, such as the neutron flux or the γ-ray background, that sometimes can not be measured or at least not in every position ...
Artículo
The s-process in the Nd-Pm-Sm region: Neutron activation of 147Pm
(Elsevier: SCOAP3, 2019)
The Nd-Pm-Sm branching is of interest for the study of the s-process, related to the production of heavy elements in stars. As 148Sm and 150Sm are s-only isotopes, the understanding of the branching allows constraining the ...
Artículo
A new CVD Diamond Mosaic-Detector for (n, α ) Cross-Section Measurements at the n TOF Experiment at CERN
(Elsevier, 2013)
At the n\_TOF experiment at CERN a dedicated single-crystal chemical vapor deposition (sCVD) Diamond Mosaic-Detector has been developed for (n,alpha) cross-section measurements. The detector, characterized by an excellent ...
Artículo
β-decay half-lives and β-delayed neutron emission probabilities for several isotopes of Au, Hg, Tl, Pb, and Bi, beyond N = 126
(American Physical Society, 2017-06-23)
Background: There have been measurements on roughly 230 nuclei that are β-delayed neutron emitters. They range from 8 He up to 150La. Apart from 210Tl, with a branching ratio of only 0.007%, no other neutron emitter has ...
Artículo
Laser-driven neutrons for time-of-flight experiments?
(EDP Sciences, 2020)
Neutron beams, both pulsed and continuous, are a powerful tool in a wide variety of research fields and applications. Nowadays, pulsed neutron beams are produced in conventional accelerator facilities in which the time-of-fight ...
Artículo
High accuracy 235 U(n,f) data in the resonance energy region
(EDP sciences, 2016)
The 235U neutron-induced cross section is widely used as reference cross section for measuring other fission cross sections, but in the resonance region it is not considered as an IAEA standard because of the scarce ...
Artículo
The new vertical neutron beam line at the CERN n_TOF facility design and outlook on the performance
(Elsevier, 2015)
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 ...