New Thermonuclear Rate of 7Li(d,n)24He relevant to the Cosmological Lithium Problem

Abstract

Accurate 7Li(d,n)24He thermonuclear reaction rates are crucial for precise prediction of the primordial abundances of Lithium and Beryllium and to probe the mysteries beyond fundamental physics and the standard cosmological model. However, uncertainties still exist in current reaction rates of 7Li(d,n)24He widely used in Big Bang Nucleosynthesis (BBN) simulations. In this work, we reevaluate the 7Li(d,n)24He reaction rate using the latest data on the three near-threshold 9Be excited states from experimental measurements. We present for the first time uncertainties that are directly constrained by experiments. Additionally, we take into account for the first time the contribution from the subthreshold resonance at 16.671 MeV of 9Be. We obtain a 7Li(d,n)24He rate that is overall smaller than the previous estimation by about a factor of 60 at the typical temperature of the onset of primordial nucleosynthesis. We implemented our new rate in BBN nucleosynthesis calculations, and we show that the new rates have a very limited impact on the final light element abundances in uniform density models. Typical abundance variations are in the order of 0.002%. For nonuniform density BBN models, the predicted 7Li production can be increased by 10% and the primordial production of light nuclides with mass number A>7 can be increased by about 40%. Our results confirm that the cosmological lithium problem remains a long-standing unresolved puzzle from the standpoint of nuclear physics.

References in corpus (46)

• Big Bang Nucleosynthesis: 2015
• Solar Fusion Cross Sections
• Primordial Nucleosynthesis in the Precision Cosmology Era
• The Primordial Lithium Problem
• Lithium isotopic abundances in metal-poor halo stars
• Precision big bang nucleosynthesis with improved Helium-4 predictions
• Big-Bang Nucleosynthesis After Planck
• Updated Big Bang Nucleosynthesis confronted to WMAP observations and to the Abundance of Light Elements
• A Bitter Pill: The Primordial Lithium Problem Worsens
• Primordial Nucleosynthesis in Light of WMAP
• Compilation and R-matrix analysis of Big Bang nuclear reaction rates
• PArthENoPE: Public Algorithm Evaluating the Nucleosynthesis of Primordial Elements
• Nuclear Reaction Network for Primordial Nucleosynthesis: a detailed analysis of rates, uncertainties and light nuclei yields
• The metal-poor end of the Spite plateau. 1: Stellar parameters, metallicities and lithium abundances
• Big Bang Nucleosynthesis as a Probe of New Physics
• Standard Big-Bang Nucleosynthesis up to CNO with an improved extended nuclear network
• AlterBBN: A program for calculating the BBN abundances of the elements in alternative cosmologies
• Microscopic calculation of the 3He(alpha,gamma)7Be and 3H(alpha,gamma)7Li capture cross sections using realistic interactions
• PArthENoPE reloaded
• The 7Be(n,alpha)4He reaction and the Cosmological Lithium Problem: measurement of the cross section in a wide energy range at n_TOF (CERN)
• Big Bang nucleosynthesis revisited via Trojan Horse Method measurements
• Evaluation of Modern 3He(alpha,gamma)7Be Data
• Non-extensive Statistics Solution to the Cosmological Lithium Problem
• The 7Be(d,p)2alpha cross section at Big Bang energies and the primordial 7Li abundance
• The ${}^7$Be($\mathbf{n},\mathbf{p}$)${}^7$Li reaction and the Cosmological Lithium Problem: measurement of the cross section in a wide energy range at n_TOF (CERN)
• Resonant Destruction as a Possible Solution to the Cosmological Lithium Problem
• New Nuclear Physics for Big Bang Nucleosynthesis
• Bayesian Estimation of Thermonuclear Reaction Rates
• A revised thermonuclear rate of ${}^7$Be($n$,$\alpha$)${}^4$He relevant to Big-Bang nucleosynthesis
• One fewer solution to the cosmological lithium problem
• Geometrical Effects of Baryon Density Inhomogeneities on Primordial Nucleosynthesis
• Modified big bang nucleosynthesis with non-standard neutron sources
• Primordial nucleosynthesis with varying fundamental constants: Improved constraints and a possible solution to the Lithium problem
• Search for new resonant states in 10C and 11C and their impact on the cosmological lithium problem
• Resonant enhancement of nuclear reactions as a possible solution to the cosmological lithium problem
• Big Bang Nucleosynthesis with an Inhomogeneous Primordial Magnetic Field Strength
• Revised Big Bang Nucleosynthesis with long-lived negatively charged massive particles: updated recombination rates, primordial 9Be nucleosynthesis, and impact of new 6Li limits
• Electron screening and its effects on Big-Bang nucleosynthesis
• Cosmological solutions to the Lithium problem: Big-bang nucleosynthesis with photon cooling, $X$-particle decay and a primordial magnetic field
• A new measurement of the 7Li(d,p)8Li cross section and consequences for 7Be(p,gamma)8B
• Big Bang nucleosynthesis with a non-Maxwellian distribution
• Mirror matter can alleviate the cosmological lithium problem
• Measurement of $d{+}^7$Be cross sections for Big-Bang nucleosynthesis
• Low-lying Resonances and Relativistic Screening in Big Bang Nucleosynthesis
• Impact of the ${}^7$Be($\alpha ,\gamma$)${}^{11}$C reaction on the primordial abundance of ${}^7$Li
• Cosmic Rays during BBN as Origin of Lithium Problem

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• Big Bang nucleosynthesis as a probe of new physics
• Inside the Black Box of Big Bang Nucleosynthesis: A Comprehensive Sensitivity Atlas for the Precision Era