An Innovative Method to Measure the Gamma-Ray Emission Probabilities in the Decay of Np-238 and Pa-233

作者：Leconte P^*; Hudelot J P; Antony M; Di Salvo J; Bernard D

来源：Nuclear Science and Engineering, 2012, 170(3): 251-264.

The absolute emission probabilities of gamma rays from the decay of Np-238 and Pa-233 have been measured by an innovative method combining pile oscillation and neutron activation techniques. We obtained values of (24.99 +/- 0.34)% and (37.79 +/- 0.64)% for the 984.5- and 311.9-keV gamma rays from Np-238 and Pa-233, respectively, in good agreement with the recommended values proposed by the Decay Data Evaluation Project (DDEP): (25.18 +/- 0.13)% and (38.3 +/- 0.5)%. The influence of gamma-ray emission probabilities from Np-238 and Pa-233 on neutron capture cross-section measurements of Np-237 and Th-232, respectively, are discussed and tend to confirm the recommended values from the DDEP. A patent has been granted for this method.

• 出版日期2012-3
• 单位中国地震局