Elsevier

Nuclear Physics A

Volume 373, Issue 2, 11 January 1982, Pages 225-236
Nuclear Physics A

Fission fragment energy correlation measurements for 229Th(nth,f)

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Abstract

Fission-fragment mass and kinetic energy distributions and their correlations have been measured for 229Th. The results are compared with those for the neighbouring nuclei. The 229Th yield data show a peak for the symmetric fission. The mass yield peak/valley ratio is 531 ± 49. The 〈EK〉(μH ≈ 115−22) is flat and the dip ΔEK at symmetry is 18.0 ± 1.1 MeV. In the yields for high kinetic energy selected events, the mass 144 dominates. A complete systematic for the μH≈ 144 structure as a function of the fissioning nuclei is presented and discussed.

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Centre d'Etudes Nucléaires de Bordeaux-Gradignan, Université de Bordeaux, France.

∗∗

Département de Recherche Fondamentale, CEN-Grenoble, France.

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