Study of One- and Two-Nucleon Transfer Reactions Induced byO16Ions Incident on the Even Zr Isotopes

Abstract

Transitions to known single-particle states in ${}_{}{}^{91,93,95,97}{}_{}{}^{}\mathrm{Nb}$ are observed in the (${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$, ${}_{}{}^{15}{}_{}{}^{}\mathrm{N}$) reaction induced by the bombardment of ${}_{}{}^{90,92,94,96}{}_{}{}^{}\mathrm{Zr}$ with 60 MeV ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ ions. Other strong transitions are also observed in this reaction, however, and evidence is presented which suggests that the final states observed are proton plus core vibrational states. The (${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$, ${}_{}{}^{14}{}_{}{}^{}\mathrm{C}$) reaction is found to populate many states in ${}_{}{}^{92,94}{}_{}{}^{}\mathrm{Mo}$ and possibly ${}_{}{}^{96}{}_{}{}^{}\mathrm{Mo}$, but few in ${}_{}{}^{98}{}_{}{}^{}\mathrm{Mo}$. The number and intensity of the states observed show a marked dependence on the neutron number of the target nucleus. The ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ energy spectra for all the targets indicate that for the nuclei and incident energies used in the present experiments the main mechanism of the (${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$, ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$) reaction is breakup of the ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ projectile.