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Title:
The Strong and Weak Lithium Anomaly in BBN
Authors:
Bruskiewich, Patrick
Publication:
American Physical Society, 10th Annual Meeting of the Northwest Section of APS, May 15-17, 2008, abstract #B4.003
Publication Date:
05/2008
Origin:
APS
Bibliographic Code:
2008APS..NWS.B4003B

Abstract

The measured abundance for ^7Li is within a factor of two agreement with the standard Big Bang Nucleosynthesis (BBN) models, however for the more fragile ^6Li, its abundance has been observed at a level three orders of magnitude above those predicted by standard BBN model. These discrepancies are known as the Lithium Anomaly. The standard BBN model predicts an abundance ratio for [^7Li / ^6Li] on the order of a 1000 or greater. Precise measurements of isotopic ratio indicate that [^7Li / ^6Li] 12.3. This discrepancy is the Strong Lithium Anomaly. The measured abundance [^7Li / ^1H] (1.5 + 0.3) x 10-10 is a factor of two lower than the abundance [^7Li/^1H] (3.82 + 0.70) x 10-10 predicted by the standard BBN calculations, and this discrepancy is the Weak Lithium Anomaly. A quick review will be done of the reactions that have been included in the BBN calculations of Lithium-6 abundance. I will discuss an experiment to address the Lithium Anomaly, via the ^7Li(^3He, ^4He)^6Li reaction using the TACTIC detector at TRIUMF.
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