Abstract :

The direct component of the $60\mathrm{Fe}(n,\gamma )61\mathrm{Fe}$ cross section was investigated by populating the bound states of the $61\mathrm{Fe}$ nucleus through the $(d,p\gamma )$ transfer reaction in inverse kinematics using a radioactive beam of $60\mathrm{Fe}$ at $27A$ MeV. The experiment was performed at GANIL using the MUST2 array and an annular double-sided silicon strip detector for the detection of the light charged particle in coincidence with the photons measured in the
EXOGAM $\gamma$-ray detectors. For the first time, the spectroscopic factors of the first $3/2^{-}$, $5/2^{-}$, $1/2^{-}$, and $9/2^{+}$ states of $61\mathrm{Fe}$ were deduced experimentally from an adiabatic distorted wave approximation analysis of the data. The obtained results show a very good agreement with the shell-model predictions. The calculated direct component of the $(n,\gamma )$ cross section was found negligible and of about 2% of the total, indicating a dominant resonant component.