  Cross section measurements of the reactions $^{90,
92}$Zr(p,$\gamma$)$^{91,93}$Nb were performed using the NSCL SuN detector at
the University of Notre Dame. These reactions are part of the nuclear reaction
flow for the synthesis of the light p nuclei. For the
$^{90}$Zr(p,$\gamma$)$^{91}$Nb reaction the new measurement resolves the
disagreement between previous results. For the $^{92}$Zr(p,$\gamma$)$^{93}$Nb
reaction the present work reports the first measurement of this reaction cross
section. Both reaction cross sections are compared to theoretical calculations
and a very good agreement with the standard NON-SMOKER model is observed.
