Measurement of the 3H(7Li,n0)9Be cross section within the energy range of big-bang nucleosynthesis

1992 ◽  
Vol 538 ◽  
pp. 515-521 ◽  
Author(s):  
A. Coc ◽  
P. Aguer ◽  
S. Barhoumi ◽  
F.M. Baumann ◽  
G. Bogaert ◽  
...  
Keyword(s):  
Energy Range ◽  
Cross Section ◽  
Big Bang ◽  
Big Bang Nucleosynthesis

scholarly journals THE 2H(α, γ)6LI REACTION AT LUNA AND BIG BANG NUCLEOSYNTHETIS

2013 ◽  
Vol 53 (A) ◽  
pp. 534-537 ◽  
Author(s):  
Carlo Gustavino
Keyword(s):  
Cross Section ◽  
Preliminary Data ◽  
Big Bang ◽  
Low Energy ◽  
Big Bang Nucleosynthesis ◽  
Lithium Abundance ◽  
Halo Stars ◽  
First Time ◽  
Standard Production ◽  
Production Channel

The <sup>2</sup>H(α, γ)<sup>6</sup>Li reaction is the leading process for the production of <sup>6</sup>Li in standard Big Bang Nucleosynthesis. Recent observations of lithium abundance in metal-poor halo stars suggest that there might be a 6Li plateau, similar to the well-known Spite plateau of <sup>7</sup>Li. This calls for a re-investigation of the standard production channel for <sup>6</sup>Li. As the <sup>2</sup>H(α, γ)<sup>6</sup>Li cross section drops steeply at low energy, it has never before been studied directly at Big Bang energies. For the first time the reaction has been studied directly at Big Bang energies at the LUNA accelerator. The preliminary data and their implications for Big Bang nucleosynthesis and the purported <sup>6</sup>Li problem will be shown.

scholarly journals Study of 3He(n,p)3H reaction at cosmological energies with trojan horse method

2020 ◽  
Vol 227 ◽  
pp. 02013 ◽  
Author(s):  
C. Spampinato ◽  
R.G. Pizzone ◽  
R. Spartà ◽  
M. Couder ◽  
W. Tan ◽  
...  
Keyword(s):  
Energy Range ◽  
Big Bang ◽  
Trojan Horse ◽  
Big Bang Nucleosynthesis ◽  
Preliminary Results ◽  
Trojan Horse Method ◽  
Gamow Energy ◽  
The Big Bang

In the network of reactions present in the Big Bang nucleosynthesis, the 3He(n, p)3H has an important role which impacts the final 7Li abundance. The Trojan Horse Method (THM) has been applied to the 3He(d, pt)H reaction in order to extract the astrophysical S(E)-factor of the 3He(n, p)3H in the Gamow energy range. The experiment will be described in the present work together with the first preliminary results.

scholarly journals A BGO set-up for the direct measurement of the D(p,γ)3He fusion cross section at LUNA

2020 ◽  
Vol 1668 (1) ◽  
pp. 012028
Author(s):  
Viviana Mossa
Keyword(s):  
Cross Section ◽  
Cosmic Time ◽  
Fusion Cross Section ◽  
Big Bang ◽  
Baryon Density ◽  
Reaction Cross ◽  
Big Bang Nucleosynthesis ◽  
Primordial Abundance ◽  
Set Up ◽  
The Big Bang

Abstract The Big Bang Nucleosynthesis (BBN) describes the production of light nuclides occurred during the first minutes of cosmic time. It started with the accumulation of deuterium, whose primordial abundance is sensitive to the universal baryon density and to the amount of relativistic particles. Currently the main source of uncertainty to an accurate theoretical deuterium abundance evaluation is due to the poor knowledge of the D(p, γ)3He cross section at BBN energies. The present work wants to describe one of the two experimental approaches proposed by the LUNA collaboration, whose goal is to measure with unprecedented precision, the reaction cross section in the energy range 30 < Ecm[keV] < 300.

scholarly journals New measurement of the cross section of the big bang nucleosynthesis reaction $D(\alpha,\gamma)^{6}Li$ and its astrophysical impact

2010 ◽  
Author(s):  
Feirouz Hammache ◽  
Daniel Galaviz ◽  
K. Sümmerer ◽  
S. Typel ◽  
F. Uhlig ◽  
...  
Keyword(s):  
Cross Section ◽  
Big Bang ◽  
Big Bang Nucleosynthesis ◽  
The Cross ◽  
The Big Bang
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