The Origin of Oxygen in the Universe - A new approach to an Old Question

Details The Origin of Oxygen in the Universe - A new approach to an Old Question The Origin of Oxygen in the Universe - A new approach to an Old Question

Feb 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012jphcs.337a2006r&link_type=abstract

Journal of Physics: Conference Series, Volume 337, Issue 1, pp. 012006 (2012).

Physics

Scientific paper

Carbon and oxygen are not only important elements for the existence of life on Earth, but they also play an important role in the evolution of stars towards the end of their life cycle. The formation of 12C through the so-called triple-α reaction is quite well understood. The next step, the formation of 16O through the a capture reaction 12C(α, γ)16O on the other hand, still has an experimental uncertainty of ~ 30%. Direct measurements of the 12C(α, γ)16O reaction by detecting either the outgoing γ radiation in a high acceptance Ge-detector array or the residual 16O nuclei in a mass spectrometer do not allow for order-of-magnitude improvements. In this contribution, the possibility of using superheated bubble detectors for a measurement of the time-inverse 16O(γ, α)12C reaction is being discussed. The first results of a 'proof-of-principle' experiment of the 19F(γ, α)15N reaction are also being presented.

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