The DIANA Underground Accelerator Facility at DUSEL Laboratory

Lemut, A.; Couder, M.; Winklehner, Daniel; Champagne, Arthur E; Collon, P.; Famiano, M.; Gray, F.; Greife, U.; Hodkinson, A.; Iliadis, Christian; Leitner, D.; Leitner, Matthaeus; Saba, J. S.; Stech, E.; Vetter, Paul; Waldron, W.L.; Michael, Wiescher

doi:10.22323/1.100.0126

Cited by 1 publication

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“…More in general, the present "Era of precision cosmology" requires the accurate measurements of several reaction at BBN energies, in the whole BBN energy range. This program can be accomplished with present (LUNA) and proposed facilities [14,15,16].…”

Section: Discussionmentioning

confidence: 99%

“…The detection efficiency can be determined by precise Monte Carlo simulations, as well as performing dedicated measurements and calibrations, e.g. by measuring the absolute efficiency at a γ ray energy of 6.13 MeV exploiting the 340 keV resonance in the 19 F(p, αγ) 16 O reaction. With the proposed setup the expected counting rate (full detection γ-peak) is of the order of 10 4 − 10 5 events/hour in the considered energy range (see figure 6), making the measurements with BGO detector relatively fast for what concern statistics and allowing to determine the beam heating effect and the target density in asymptotical conditions, by performing dedicated measurements in which target pressure and beam intensity are varied.…”

Section: Pos(bormio 2014)050mentioning

confidence: 99%

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BBN, Neutrinos and Nuclear Astrophysics

Gustavino¹

2014

Proceedings of 52 International Winter Meeting on Nuclear Physics — PoS(Bormio2014)

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Big Bang Nucleosynthesis (BBN) theory describes the formation of light isotopes such as D, 3 He, 4 He, 6 Li and 7 Li in the first minutes of cosmic time. Their abundance only depends on the baryon density, on particle physics and on nuclear astrophysics, through the competition between the universal expansion rate and the yields of the relevant nuclear reactions. As the expansion rate increases with the number of neutrino families (and any other relativistic species), the comparison between computed and observed abundances of light isotopes allows to constrain the number of neutrinos species, provided that the knowledge of the relevant nuclear processes is accurate enough. Starting from the present uncertainty of the relevant parameters (i.e. baryon density, observed abundance of isotopes and BBN nuclear cross sections), it will be shown that a renewed study of several nuclear reactions, possibly with existing or proposed underground accelerator facilities, is essential to improve the accuracy of computed abundances of light isotopes, providing the BBN theory a powerful probe of particle physics beyond the standard model. In particular, it will be shown that the accurate measurement of the D(p, γ) 3 He reaction at BBN energies (40-400 keV), is of primary importance to constrain the number of active neutrinos and/or the lepton degeneracy in the neutrino sector.

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Section: Discussionmentioning

confidence: 99%

Section: Pos(bormio 2014)050mentioning

confidence: 99%