[PDF] Top 20 7Be(n,p) cross section measurement for the Cosmological Lithium Problem at the n_TOF facility at CERN
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7Be(n,p) cross section measurement for the Cosmological Lithium Problem at the n_TOF facility at CERN
... At n_TOF the neutron beam is produced by spallation of a pulsed proton beam from the CERN Proton Synchrotron accelerator (PS), with momentum of 20 GeV/c, impinging on a cylindrical lead target surrounded by ... See full document
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Be 7 (n,p) Li 7 Reaction and the Cosmological Lithium Problem : Measurement of the Cross Section in a Wide Energy Range at n-TOF at CERN
... This cross section was measured in the 1980s at the Joint Institute for Nuclear Research (Dubna, Russia) from thermal to 500 eV neutron energy [7], and shortly thereafter at the Los Alamos Neutron Science ... See full document
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The measurement programme at the neutron time-of-flight facility n_TOF at CERN
... the n TOF facility are related to cross sections: capture and fission experiments since phase-I and also (n,α) and (n,p) measurements in phase-II and ...typical ... See full document
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Direct measurement of the 7Be(n, α)4 He reaction cross sections for the cosmological Li problem
... obtained cross sections are much larger than the cross sections for s-wave neutrons inferred from the recent measurement at the n_TOF facility in CERN, but significantly smaller ... See full document
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Experimental setup and procedure for the measurement of the 7Be(n,α)α reaction at n-TOF
... EAR2 facility, and the perfectly matched n_TOF dynamic range, offer the op- portunity to measure this cross-section in a wide energy range for the fi rst ... See full document
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Measurement of the radiative capture cross section of the s-process branching points 204Tl and 171Tm at the n-TOF facility (CERN)
... [1] E. Burbidge, G. Burbidge, W. Fowler, F. Hoyle, Rev. Mod. Phys. 29, 547 (1957) [2] A. Cameron, A.E.C.L. Chalk River, Canada, Technical Report No. CRL – 41 (1957) [3] F. Käppeler, R. Gallino, S. Bisterzo, and W. Aoki, ... See full document
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Neutron cross-sections for advanced nuclear systems: the n_TOF project at CERN
... Moreover, a new beam line is now under construction. It will have a 20 m flight path and it will be placed on the vertical of the spallation target. As a consequence of the shorter flight path with respect to the ... See full document
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Towards the high-accuracy determination of the 238U fission cross section at the threshold region at CERN – n_TOF
... fission cross section ratio has been measured at n_TOF with two different detection systems, one of which was used in two different geometrical ...U(n,f) cross section was ... See full document
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Review of the n_TOF experimental program for Reactor Applications
... time-of-flight n_TOF facility [4] at CERN, neutrons produced by spallation of 20 GeV/c protons on a lead target travel through an evacuated beam line of 185 meters before reaching the experimental ... See full document
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Fission Fragment Angular Distribution measurements of 235U and 238U at CERN n_TOF facility
... ratio [1] were obtained fitting the anisotropy parameter of the FFAD data available in the EXFOR database. The FFAD experimental data for the (n,f) reactions of 235 U and 238 U published in the EX- FOR [2] database ... See full document
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Cosmological Lithium Problems
... the cosmological lithium problems followed by a summary of our recent theoretical work on the magnitude of the effects of electron screening, the possible existence of dark matter parallel universes and the ... See full document
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Measurement of the 244Cm and 246Cm neutron-induced capture cross sections at the n_TOF facility
... at n_TOF. In this facility, the neutron beam is generated through spallation of 20 GeV / c protons, which are extracted in pulses from the CERN Proton Synchrotron and impinging on a lead ... See full document
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Measurement of the radiative capture cross section of the s-process branching points 204Tl and 171Tm at the n_TOF facility (CERN)
... The counting rate TOF (or neutron-energy equivalent) spectra were transformed, after background subtraction, into capture yield by applying the so-called Pulse Height Weighting Technique (PHWT) [7]. The gold saturated ... See full document
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The CERN n_TOF facility: a unique tool for nuclear data measurement
... The experimental yield has been analyzed with the resonance shape analysis (RSA) code SAMMY [35] to obtain the parametrization of the capture cross-section in terms of resonance pa- rameters. A simultaneous ... See full document
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Cosmological Lithium Problem: A Sensitivity Analysis of 7Li Primordial Abundance to Dark Matter
... The Cosmological Lithium Problem centers on the fact that astronomers have been unable to reconcile the abundance of lithium produced from Big-Bang Nucleosynthesis (BBN) with the actual ... See full document
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The SHIP facility at CERN
... The neutrino detector is made of a magnetised tar- get region, followed by a muon spectrometer, as shown in Fig. 2. The neutrino target is based on the emulsion cloud chamber technology employed by the OPERA ex- periment ... See full document
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Measurements of high-energy neutron-induced fission ofnatPb and 209Bi
... A detailed characterisation of the targets used in this experiment, including the values of the total masses, and their chemical composition has been performed by means of Rutherford Backscattering Spectroscopy (RBS). ... See full document
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Influence of the cross-section shape in the capillaries on the wetting properties demonstrated by the calculated wetting angles
... These observations and explanations fit well with the general concept as given in the standard literature (Adam- son, 1990, p. 46). However, these findings are not part of the standard soil physics literature. The ... See full document
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Anxiety’s Prison at the Jail
... Characteristics of respondents furthermore is education. Based on the research results obtained that majority are penal education Junior High School (middle school). Research conducted by Spjeldnes, Jung, & Yamatani ... See full document
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Measurement of 2H(p, pp) n cross sections at Ep = 250 MeV
... H(p, p)pn experi- ment at 250 MeV [13, ...breakup cross section were obtained as shown in Fig. 1. Measured cross section is up to twice larger than 3N calculated ... See full document
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