New measurements on isobaric fission product yields and mean kinetic energy for ²⁴¹Pu thermal neutron-induced fission

Abstract

Abstract. Nuclear fission yields data measurements for thermal neutron induced fission of 241 Pu have been carried out at the Institut Laue Langevin (ILL) in Grenoble, using the Lohengrin mass spectrometer. Mass, isotopic and isomeric yields have been extracted for the last measurements. A focus is given in this document to the mass yield results which are obtained for almost the entire heavy peak and most of the light high yields masses, along with the covariance matrix. The mean kinetic energy as a function of the fission product mass has also been extracted from the measurements. The total mean kinetic energy pre and post neutron emission have been assessed and compared to other works showing a rather good agreement.

A study of the construction of the correlation matrix of 241Pu(nth,f) isobaric fission yields

“…Two measurements for thermal neutron induced fission of 241 Pu have been carried out at the ILL in Grenoble (France), using the LOHENGRIN mass spectrometer [6,7] in May 2013 [8], labelled as Exp.1, and November 2015 [9], labelled as Exp.2. This instrument allows a selection of fission products regarding the A/q and E k /q ratios, supplying an ion beam of of mass A, kinetic energy E k and of ionic charge q with an excellent mass resolution (DA/A ≃ 1/400).…”