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Abstract

Highly depleted uranium oxide (purchased from the Oak Ridge National Laboratory) was irradiated with thermal neutrons and the 239-Np was isolated using a preparation technique based on (Wi59) and (Bo60). The original Np-chloride state was converted into the citrate form (pH = 3.5) for the injection solution. The 239-Np radioactivity calibration was performed by evaluation of the 278 KeV gamma line (decay probability 14%) and measured with a high resolution Ge - Li semiconductor. The calibrated counting efficiency was 8.4% for the 278 KeV gamma line. The activity of the most common radiochemical contaminant 95-Zr - 95-Nb, in the 239-Np injection solution was usually less than 10**- 5- of the 239-Np activity.

Additional information

Authors: MUELLER W A, GESELLSCHAFT FUER STRAHLEN- UND UMWELTFORSCHUNG, MUENCHEN, NEUHERBERG (GERMANY);LINZNER U GESELLSCHAFT FUER STRAHLEN- UND UMWELTFORSCHUNG, MUENCHEN, NEUHERBERG (GERMANY), GESELLSCHAFT FUER STRAHLEN- UND UMWELTFORSCHUNG, MUENCHEN, NEUHERBERG (GERMANY)
Bibliographic Reference: HEALTH PHYSICS, VOL. 44 (1983), SUPPLEMENT NO. 1, PP. 577-580
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