Abstract:
60Fe can be used in the study of the outbreak of supernova, the synthesis of celestial bodies in nuclear astrophysics, as well as the metabolism of iron in the organism as a tracer. As the neutron activation production of the reactor,
60Fe also plays an important role for nuclear facilities and nuclear safety. In accelerator mass spectrometer, the large negative ion beam and the suppression of isotope
60Ni are the key steps to improve the measurement sensitivity of
60Fe. In this work, the process of sample preparation and beam extraction were tested. The beam intensity, suppression of
60Ni, the relationship between the electron affinity and beam current, the choice of conductive medium, and the problems found in the test process were discussed. The series of experiments showed that the sample chemical form of Fe
2O
3, the ion extraction form of FeO
-, and the conducting medium of Ag powder were the best choices for
60Fe AMS measurement.
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