Spectroscopy of Fe 61 via the neutron transfer reaction H 2 (Fe 60,p) Fe ∗ 61

Abstract

The direct component of the Fe60(n,γ)Fe61 cross section was investigated by populating the bound states of the Fe61 nucleus through the (d,pγ) transfer reaction in inverse kinematics using a radioactive beam of Fe60 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 γ-ray detectors. For the first time, the spectroscopic factors of the first 3/2-, 5/2-, 1/2-, and 9/2+ states of Fe61 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,γ) cross section was found negligible and of about 2% of the total, indicating a dominant resonant component.