ABSTRACT
Cross section data for formation of the medically important radionuclide (61)Cu (T½=3.33h) in proton and deuteron induced reactions on enriched (64)Zn and in (3)He- and α-particle induced reactions on (59)Co were analyzed by using the nuclear model calculational codes, EMPIRE and TALYS. A well-defined statistical procedure was then employed to derive the recommended excitation functions, and therefrom to obtain integral yields. A comparison of major production routes of (61)Cu was done.
Subject(s)
Cobalt Isotopes/chemistry , Copper Radioisotopes/chemistry , Deuterium/chemistry , Helium/chemistry , Isotope Labeling/methods , Models, Chemical , Zinc Isotopes/chemistry , Cobalt Isotopes/radiation effects , Computer Simulation , Copper Radioisotopes/isolation & purification , Copper Radioisotopes/radiation effects , Deuterium/radiation effects , Helium/radiation effects , Isotopes/chemistry , Isotopes/radiation effects , Protons , Radiation Dosage , Zinc Isotopes/radiation effectsABSTRACT
Residual 60Co activity in five steel samples induced by neutrons from the Nagasaki atomic bomb has been measured within about 1000 m from the hypocenter. The chemical separation of cobalt and nickel from steel samples was performed, and cobalt-enriched samples were prepared for all samples. Gamma-ray measurements were carried out with a low-background well-type germanium detector. The gamma-ray spectra for five samples were compared with the spectrum of a control sample to ensure that the observed 60Co was actually induced by A-bomb neutrons. The activation of cobalt by environmental neutrons was also investigated. It has been shown that the present 60Co data are consistent with earlier Hashizume's data.