Short-Lived Fission Products Yield Measurement for 239Pu(nth,f)
-
Graphical Abstract
-
Abstract
The cumulative fission yields of shortlived nuclides 88Rb, 95Y, 101Mo, 101Tc, 138Csg, and 142La in thermal neutron induced fission of 239Pu have been determined by gamma-ray spectrometry relative method. 97Zr is selected as the reference nuclide. The determined cumulative fission yields are given as following: the Y(88Rb)=(1.32±0.05) %, Y(95Y)=(4.69±0.22)%, Y(101Mo)=(6.13±0.32 )%, Y(101Tc)= (6.10±0.22)%, Y(138Csg)= (6.24±0.24)%, Y(142La)=(4.74±0.17)%. The major work include HPGe detector efficiency calibration, sample sealing and irradiation, gamma-ray measurement and data analysis. The determined nuclides are located in left, middle, right of light group, and in middle, right of heavy group for asymmetric fission model. The accurate yields data supply a gap for domestic nuclear database, and reflect the fission products mass distribution character in thermal neutron induced fission of 239Pu.
-
-