Cosmological lithium problem solution in accelerator experiment.

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Bibliographic Details
Title:	Cosmological lithium problem solution in accelerator experiment.
Authors:	Dudkin, G. N.¹ (AUTHOR) dudkin@tpu.ru
Source:	Russian Physics Journal. Nov2024, Vol. 67 Issue 11, p1838-1848. 11p.
Subjects:	Particles (Nuclear physics), Ion accelerators, Nuclear physics, Physical sciences, Nucleosynthesis
Abstract:	The cosmological lithium problem is a serious problem for understanding the early Universe, which casts doubt on the Big Bang nucleosynthesis (BBN) model. The problem is that the data on the abundance of 6Li and 7Li elements obtained from astronomic observations and in the BBN model are too different, based on the data on all nuclear reactions in which these elements produce (or destroy). Astronomy continues to improve the optical instrumentation in order to achieve better resolution and efficiency. In nuclear physics, cross sections of all reactions resulting in the lithium nucleus production (or destruction) are being clarified. This work presents a brief review of related theoretical calculations and experimental data. Experimental results are presented in the laboratory coordinate system for 3H(3He, γ)6Li reaction at an energy of 38 keV, first obtained using the Hall ion accelerator in National Research Tomsk Polytechnic University, Tomsk, Russia. S-factor calculated for 3H(3He, γ)6Li S = 0.15 ± 0.03 keV·b reaction is inconsistent either with approximation of the experimental data obtained at high energies, or theoretical calculations. It is also inconsistent with assumptions about a new physics hidden in this reaction. Our work discusses the possibility of solving the cosmological lithium problem via reactions with light neutron clusters. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	The cosmological lithium problem is a serious problem for understanding the early Universe, which casts doubt on the Big Bang nucleosynthesis (BBN) model. The problem is that the data on the abundance of 6Li and 7Li elements obtained from astronomic observations and in the BBN model are too different, based on the data on all nuclear reactions in which these elements produce (or destroy). Astronomy continues to improve the optical instrumentation in order to achieve better resolution and efficiency. In nuclear physics, cross sections of all reactions resulting in the lithium nucleus production (or destruction) are being clarified. This work presents a brief review of related theoretical calculations and experimental data. Experimental results are presented in the laboratory coordinate system for 3H(3He, γ)6Li reaction at an energy of 38 keV, first obtained using the Hall ion accelerator in National Research Tomsk Polytechnic University, Tomsk, Russia. S-factor calculated for 3H(3He, γ)6Li S = 0.15 ± 0.03 keV·b reaction is inconsistent either with approximation of the experimental data obtained at high energies, or theoretical calculations. It is also inconsistent with assumptions about a new physics hidden in this reaction. Our work discusses the possibility of solving the cosmological lithium problem via reactions with light neutron clusters. [ABSTRACT FROM AUTHOR]
ISSN:	10648887
DOI:	10.1007/s11182-024-03320-z