Search for a narrow resonant transfer and excitation resonance of titanium projectiles channeled in a gold crystal

Transfer and excitation, resulting from simultaneous electron capture and K-shell excitation in a single collision, has been measured 280–310-MeV ${\mathrm{Ti}}^{20+}$ ions channeled in the 〈100〉 axis of a thin Au single crystal. The 19+ charge-state fraction of the Ti ions exiting the Au crystal was measured as a function of ion energy and showed no narrow peak attributable to resonant transfer and excitation (RTE). The number of Ti Kα x rays, emitted by the Ti ions due to RTE, in coincidence with ${\mathrm{Ti}}^{19+}$ was also measured at two energies, on and off the previously reported narrow resonance, and again no evidence for a narrow resonance was observed.