Zavatarelli, S. (2019) A new measurement of the 2H(p,γ)3He cross section at the BBN energies. Il nuovo cimento C, 42 (2-3). pp. 1-4. ISSN 1826-9885
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Abstract
The Big Bang Nucleosynthesis (BBN) models describe the production of light nuclei in the first minutes of cosmic time. When, as a consequence of temperature decrease of the Universe, the equilibrium between deuteron production through p(n, γ) 2H and its photo-dissociation was broken, the deuterium nuclei just created were destroyed through the 2H(2H,p)3H, the 2H(2H,n)3He and the 2H(p,γ) 3He reactions. The overall primordial deuterium abundance is thus determined by the cross sections of all these reactions, experimentally studied in nuclear laboratories since the middle of last century. Recently, precise measurements of the primordial deuterium abundance have opened the possibility to precisely constrain the primordial baryon-to-photon ratio, independently from evaluations based on the Cosmic Microwave Background (CMB) measurements. For their interpretation, the deuterium abundance data require equally precise nuclear physics data: the main obstacle to an accurate theoretical 2H abundance evaluation is the poor knowledge of the 2H(p,γ) 3He cross section at the relevant energies. The aim of the present work is to describe the experimental effort undertaken by the LUNA collaboration, aimed to measure with unprecedented precision the reaction cross section in the BBN energy range (30<Ec.m.[keV ]<300).
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 01 Dec 2020 08:45 |
| Last Modified: | 01 Dec 2020 08:45 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/20525 |
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