  The synthesis of heavy, proton rich isotopes is a poorly understood
astrophysical process. Thermonuclear (type Ia) supernova explosions are among
the suggested sites and the abundance of some isotopes present in the early
solar system may be used to test the models. 92Nb is such an isotope and one of
the reactions playing a role in its synthesis is 91Zr(p,gamma)92Nb. As no
experimental cross sections were available for this reaction so far,
nucleosynthesis models had to solely rely on theoretical calculations. In the
present work the cross section of 91Zr(p,gamma)92mNb has been measured at
astrophysical energies by activation. The results excellently confirm the
predictions of cross sections and reaction rates for 91Zr(p,gamma)92Nb, as used
in astrophysical simulations.
