Measurement of the ${}^{90,92}$Zr(p,$\gamma$)${}^{91,93}$Nb reactions for the nucleosynthesis of elements around A=90

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.