Setup commissioning for an improved measurement of the D(p,gamma)3He cross section at Big Bang Nucleosynthesis energies

Abstract

Among the reactions involved in the production and destruction of deuterium during Big Bang Nucleosynthesis, the deuterium-burning D(p,gamma)3He 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)3He 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.

arXiv comment11 pages, 11 figures

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• PArthENoPE Revolutions
• Exploring Stars in Underground Laboratories: Challenges and Solutions
• Solar fusion III: New data and theory for hydrogen-burning stars
• The study of key reactions shaping the post main-sequence evolution of massive stars in underground facilities
• Underground Measurements of Nuclear Reaction Cross-Sections Relevant to AGB Stars
• Measurement of the ${}^2$H($p,\gamma$)${}^3$He S-factor at 265-1094keV
• Detectors and Shieldings: Past and Future at LUNA
• Study of the ${}^{20}$Ne($p,\gamma$)${}^{21}$Na reaction at LUNA