Mass and Isotopic Yields for the Reaction 245Cm(nTH,f) Measured at Lohengrin

The fission fragment mass, charge, and kinetic energy distributions for the thermal neutron induced fission of ²⁴⁵Cm were measured using the LOHENGRIN mass separator at ILL Grenoble associated with a big ionization chamber (Z-identification) with a split anode (energy loss-remaining energy simultaneously measured, ΔE - E_R technique). The ionization chamber was combined with a passive absorber (Stack of Parylene C foils) to further improve the Z-resolution for heavier products (A > 96) up to 4 nuclear charges per mass. Considering the available experimental data prior to this work, the range of measured mass yields was extended from A = 76-132 to A = 67-167, and isotopic yields from A = 76-96 to A = 67-119, i.e. for corresponding nuclear charges ranging from Z = 26 to 48. A comparison of these new data with the existing evaluations of fission product yields (JEF2.2 and ENDF/B-VI) and systematics (by Wahl) was also performed. A study of the global odd-even effect for protons was done and the results were compared with the data for the fission of other transuranium elements. The global δ_Z value of proton odd-even effect calculated is 10.5 ± 0.5 %, which fits well to the known systematics for the δ_Z as a function of the fissility.