Total prompt γ-ray emission in fission
oleh: Wu C.Y., Chyzh A., Kwan E., Henserson R.A., Bredeweg T.A., Haight R.C., Hayes-Sterbenz A.C., Lee H.Y., O’Donnell J.M., Ullmann J.L.
| Format: | Article |
|---|---|
| Diterbitkan: | EDP Sciences 2016-01-01 |
Deskripsi
The total prompt γ-ray energy distributions for the neutron-induced fission of 235U, 239,241Pu at incident neutron energy of 0.025 eV ‒ 100 keV, and the spontaneous fission of 252Cf were measured using the Detector for Advanced Neutron Capture Experiments (DANCE) array in coincidence with the detection of fission fragments by a parallel-plate avalanche counter. DANCE is a highly segmented, highly efficient 4π γ-ray calorimeter. Corrections were made to the measured distribution by unfolding the two-dimension spectrum of total γ-ray energy vs multiplicity using a simulated DANCE response matrix. The mean values of the total prompt γ-ray energy, determined from the unfolded distributions, are ~ 20% higher than those derived from measurements using single γ-ray detector for all the fissile nuclei studied. This raises serious concern on the validity of the mean total prompt γ-ray energy obtained from the product of mean values for both prompt γ-ray energy and multiplicity.