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We have studied the sensitivity of supernova production of the gamma emittingnuclei 26Al, 44Ti and 60Fe to variations of the rates of the triple alpha and12C(alpha, gamma) reactions. Over a range of twice their experimentaluncertainties we find variations in the production of 60Fe by more than afactor of five. Smaller variations, about a factor of two to three, wereobserved for 26Al and 44Ti. The yields of these isotopes change significantlywhen the abundances of Lodders (2003) are used instead of those of Anders andGrevesse (1989). These sensitivities will limit conclusions based on acomparison of observed gamma ray intensities and stellar models until thehelium burning rates are better known. Prospects for improving the heliumburning rates are discussed and a new version of the Boyes rate for 12C(alpha,gamma} is presented.

Production of 26Al, 44Ti and 60Fe in Supernovae-sensitivity to the helium burning rates