It has recently been proposed that ${}_{41}^{92}$Nb and ${}_{43}^{98}$Tc may have been formed in the $\nu$-process. We investigate the neutrino induced reactions related to the $\nu$-process origin of these two odd-odd nuclei. We find that the main neutrino reactions to produce ${}_{41}^{92}$Nb are the charged-current (CC) ${}^{92}$Zr(${\nu }_e,e^{-}$)${}^{92}$Nb and the neutral-current (NC) ${}^{93}$Nb[$\nu \left(\overline{\nu }\right),{\nu }^{\prime }{\left(\overline{\nu }\right)}^{\prime }$ $n$]${}^{92}$Nb reactions. Similarly, the main reactions for ${}_{43}^{98}$Tc, are the CC reaction ${}^{98}$Mo(${\nu }_e,e^{-}$)${}^{98}$Tc and the NC reaction ${}^{99}$Ru[$\nu \left(\overline{\nu }\right),{\nu }^{\prime }{\left(\overline{\nu }\right)}^{\prime }$$p$]${}^{98}$Tc. Our calculations are carried out using the quasiparticle random phase approximation. Numerical results are presented for the energy and temperature dependent cross sections. Since charge exchange reactions by neutrons may also lead to the formation of ${}_{41}^{92}$Nb and ${}_{43}^{98}$Tc, we also discuss the feasibility of the ${}^{92}$Mo($n,p$)${}^{92}$Nb and ${}^{98}$Ru($n,p$)${}^{98}$Tc reactions to produce these nuclei.

• Received 2 September 2011

DOI:https://doi.org/10.1103/PhysRevC.85.065807