JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, cilt.258, sa.2, ss.445-447, 2003 (SCI-Expanded)
The 1001 keV gamma-ray emission from Pa-234m as an analytical peak has ever increasing importance in direct gamma-ray spectrometric measurements of U-238 content in samples with the development of high pure Ge detectors of larger crystal volumes and higher efficiency. In this study, gamma-ray spectrometric measurement for the determination of the absolute intensity, P-gamma, of 1001 keV gamma-rays of Pa-234m was carried out using powdered uranium samples and a new experimental value of 0.861+/-0.015% for P-gamma of the 1001 keV gamma-ray of Pa-234m has been obtained. The present measured value is greater than most of the recent experimental results and the newly recommended value of 0.835+/-0.004% for P-gamma by 2.5 to 4%. The present result differs from the latest experimental value of 0.92+/-0.02% by 7%.