Exploració per tema "Cross section"
Ara es mostren els items 1-20 de 70
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Angular distribution in the neutron-induced fission of actinides
(EPJ Web of Conferences, 2013)
Text en actes de congrés
Accés obertAbove 1MeV of incident neutron energy the fission fragment angular distribution (FFAD) has generally a strong anisotropic behavior due to the combination of the incident orbital momentum and the intrinsic spin of the ... -
Astrophysics at n-TOF facility
(2008)
Text en actes de congrés
Accés obertThe neutron time of flight (n_TOF) facility at CERN is a neutron spallation source, its white neutron energy spectrum ranges from thermal to several GeV, covering the full energy range of interest for nuclear astrophysics, ... -
Be-7(n,alpha)He-4 reaction and the cosmological lithium problem: measurement of the cross section in a wide energy range at n_TOF at CERN
(2016-10-03)
Article
Accés obertThe energy-dependent cross section of the Be7(n,alpha)He4 reaction, of interest for the so-called cosmological lithium problem in big bang nucleosynthesis, has been measured for the first time from 10 meV to 10 keV neutron ... -
Capture cross section of 236U: the n TOF results
(2014-05-01)
Article
Accés restringit per política de l'editorialNeutron induced capture cross section on 236U has been measured with high accuracy and high resolution at n TOF, in order to improve data libraries needed for the development of advanced nuclear reactors. Preliminary results ... -
Cross section measurements of 155,157Gd(n,gamma) induced by thermal and epithermal neutrons
(2019-01-28)
Article
Accés obertNeutron capture cross section measurements on 155Gd and 157Gd were performed using the time-of-flight technique at the n_TOF facility at CERN on isotopically enriched samples. The measurements were carried out in the n_TOF ... -
Dissemination of data measured at the CERN n TOF facility
(EDP Sciences, 2016)
Comunicació de congrés
Accés obertThe n TOF neutron time-of-flight facility at CERN is used for high quality nuclear data measurements from thermal energy up to hundreds of MeV. In line with the CERN open data policy, the n TOF Collaboration takes actions ... -
Experimental neutron capture data of 58Ni from the CERN n_TOF facility
(EDP Sciences, 2015)
Comunicació de congrés
Accés obertThe neutron capture cross section of 58Ni was measured at the neutron time of flight facility n_TOF at CERN, from 27 meV to 400 keV neutron energy. Special care has been taken to identify all the possible sources of ... -
Experimental neutron capture data of 58Ni from the CERN n_TOF facility
(2014-01-09)
Article
Accés restringit per política de l'editorialThe 58Ni(n,γ ) cross section has been measured at the neutron time of flight facility n_TOF at CERN, in the energy range from 27 meV up to 400 keV. In total, 51 resonances have been analyzed up to 122 keV. Maxwellian ... -
Experimental setup and procedure for the measurement of the 7Be(n,p)7Li reaction at n_TOF
(2018-04-11)
Article
Accés obertFollowing 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 ... -
Experiments with neutron beams for the astrophysical s process
(Institute of Physics (IOP), 2013)
Text en actes de congrés
Accés obertNeutron 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 ... -
First Measurement of 72Ge(n gamma) at n-TOF
(EDP Sciences, 2018)
Text en actes de congrés
Accés obertThe 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 ... -
Fission fragment angular distribution measurements of U-235 and U-238 at CERN n_TOF facility
(EDP Sciences, 2015)
Text en actes de congrés
Accés obertNeutron-induced fission cross sections of U-238 and U-235 are used as standards in the fast neutron region up to 200 MeV. A high accuracy of the standards is relevant to experimentally determine other neutron reaction cross ... -
Fission program at n_TOF
(EPJ Web of Conferences, 2019)
Text en actes de congrés
Accés obertSince its start in 2001 the n_TOF collaboration developed a measurement program on fission, in view of advanced fuels in new generation reactors. A special effort was made on measurement of cross sections of actinides, ... -
Forthcoming (n, gamma) measurements on the Fe and Ni isotopes at CERN n_TOF
(Institute of Physics (IOP), 2009)
Text en actes de congrés
Accés restringit per política de l'editorialAn overview of the past, present and future research activities at the CERN neutron time of flight facility n TOF is given, with special focus on the astrophysical aspects. During the first campaign (Phase I), neutron ... -
High accuracy 234U(n,f) cross section in the resonance energy region
(EDP Sciences, 2016)
Comunicació de congrés
Accés obertNew results are presented of the 234U neutron-induced fission cross section, obtained with high accuracy in the resonance region by means of two methods using the 235U(n,f) as reference. The recent evaluation of the 235U(n,f) ... -
High accuracy 235U(n,f) data in the resonance energy region
(EDP Sciences, 2015)
Comunicació de congrés
Accés obertThe 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 ... -
High accuracy U-235(n,f) data in the resonance energy region
(EPJ Web of Conferences, 2015)
Text en actes de congrés
Accés obertThe U-235 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 ... -
High precision measurement of the radiative capture cross section of 238U at the n TOF CERN facility
(EDP Sciences, 2016)
Text en actes de congrés
Accés obertThe importance of improving the accuracy on the capture cross-section of 238U has been addressed by the Nuclear Energy Agency, since its uncertainty significantly affects the uncertainties of key design parameters for both ... -
High-accuracy determination of the 238U/ 235U fission cross section ratio up to ˜ 1 GeV at n_TOF at CERN
(2015-02-09)
Article
Accés obertThe U238 to U235 fission cross section ratio has been determined at n_TOF up to ˜1 GeV, with two different detection systems, in different geometrical configurations. A total of four datasets has been collected and compared. ... -
High-precision measurement of the 238U(n,¿) cross section with the Total Absorption Calorimeter (TAC) at n TOF, CERN
(2014-05-01)
Article
Accés restringit per política de l'editorialThe neutron capture cross section of U-238 is fundamental to the design and operation of current reactors and future fast nuclear reactors, and thus must be measured to a high level of accuracy. An experiment has been ...