Global R-Matrix Analysis of the ¹²C(alpha,gamma) ¹⁶O Reaction, Carl Brune, Ohio University − The ¹²C(α,γ)¹⁶O reaction, in combination with the triple-alpha process, determines the ¹²C/¹⁶O fraction at the end of stellar helium-burning.  This fraction has been shown to strongly influence any subsequent stellar evolution and, due to imprecise knowledge of ¹²C(α,γ)¹⁶O reaction rate, complicates precision tests of stellar models.  A global R-matrix analysis of the available data relevant to the low-energy ¹²C(α,γ)¹⁶O cross section, including recent measurements of the angular distribution isotropy of the narrow 2.68-MeV resonance, will be presented.  The thermonuclear reaction rate, error analysis, and recommendations for future experiments will also be discussed.