NEUTRON CAPTURE AND FISSION MEASUREMENTS ON ACTINIDES AT DANCE

A. CHYZH, C. Y. WU, E. KWAN, R. A. HENDERSON, J. M. GOSTIC, J. L. ULLMANN, T. A. BREDEWEG, M. JANDEL, A. J. COUTURE, J. M. O'DONNELL, R. C. HAIGHT, H. Y. LEE
2013 Capture Gamma-Ray Spectroscopy and Related Topics  
The prompt γ-ray energy and multiplicity distributions in the spontaneous fission of 252 Cf have been measured using a highly granular 4π γ-ray calorimeter. Corrections were made for both energy and multiplicity distributions according to the detector response, which is simulated numerically using a model validated with the γ-ray calibration sources. A comparison of the total γ-ray energy distribution was made between the measurement and a simulation by random sampling of the corrected γ-ray
more » ... corrected γ-ray energy and multiplicity distributions through the detector response. A reasonable agreement is achieved between the measurement and simulation, indicating weak correlations between γ-ray energy and multiplicity. Moreover, the increasing agreement with increasing multiplicity manifests the stochastic aspect of the prompt γ decay in spontaneous fission. This calorimeter was designed for the study of neutron capture reactions and an example is given, where the 238 Pu(n,γ) measurement was carried out in the laboratory environment for the first time.
doi:10.1142/9789814383646_0032 fatcat:af7u5oy6vza25gjyjyea5wbjwi