Among the reactions involved in the production and destruction of deuterium during Big Bang Nucleosynthesis, the deuterium-burning D(p,gamma)He-3 reaction has the largest uncertainty and limits the precision of theoretical estimates of primordial deuterium abundance. Here we report the results of a careful commissioning of the experimental setup used to measure the cross-section of the D(p,gamma)He-3 reaction at the Laboratory for Underground Nuclear Astrophysics of the Gran Sasso Laboratory (Italy). The commissioning was aimed at minimising all sources of systematic uncertainty in the measured cross sections. The overall systematic error achieved (<3%) will enable improved predictions of BBN deuterium abundance.
Among the reactions involved in the productionand destruction of deuterium during Big Bang Nucleosynthe-sis, the deuterium-burning D(p,γ)3He reaction has the largestuncertainty and limits the precision of theoretical estimates ofprimordial deuterium abundance. Here we report the resultsof a careful commissioning of the experimental setup usedto measure the cross-section of the D(p,γ)3He reaction atthe Laboratory for Underground Nuclear Astrophysics ofthe Gran Sasso Laboratory (Italy). The commissioning was aimed at minimising all sources of systematic uncertaintyin the measured cross sections. The overall systematic error achieved (< 3%) will enable improved predictions of BBNdeuterium abundance.
Setup commissioning for an improved measurement of the D(p,$$gamma $$)$$^3$$He cross section at Big Bang Nucleosynthesis energies
Mossa, V.Writing – Original Draft Preparation
;Barile, F.;Ciani, G. F.;Fiore, E. M.;Paticchio, V.;Schiavulli, L.;
2020-01-01
Abstract
Among the reactions involved in the production and destruction of deuterium during Big Bang Nucleosynthesis, the deuterium-burning D(p,gamma)He-3 reaction has the largest uncertainty and limits the precision of theoretical estimates of primordial deuterium abundance. Here we report the results of a careful commissioning of the experimental setup used to measure the cross-section of the D(p,gamma)He-3 reaction at the Laboratory for Underground Nuclear Astrophysics of the Gran Sasso Laboratory (Italy). The commissioning was aimed at minimising all sources of systematic uncertainty in the measured cross sections. The overall systematic error achieved (<3%) will enable improved predictions of BBN deuterium abundance.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
