Neutron-induced spontaneously fissioning isomers

Vladimir Makarenko

doi:10.1117/12.267941

27 February 1997 Neutron-induced spontaneously fissioning isomers

Vladimir Makarenko

Proceedings Volume 2867, International Conference Neutrons in Research and Industry; (1997) https://doi.org/10.1117/12.267941
Event: Fifth International Conference on Applications of Nuclear Techniques: Neutrons in Research and Industry, 1996, Crete, Greece

Abstract

Experimental data on neutron induced spontaneously fissioning isomers are considered. To populate isometric states of heavy nuclei in the uranium-berkelium region (n, n') and (n, gamma) reactions on actinide targets were used; pulsed beams of fast neutrons were provided by the electrostatic accelerator facilities; time analysis was applied to fission fragment spectra to distinguish between prompt and delayed events and coincidence measurements to observe for the first time light charged particle accompanied fission from isomeric state were accomplished. Measured values for fission isomer yields and obtained shapes for excitation functions find their explanation beyond the scope of the nuclear shape isomerism hypothesis, the latter being the in-thing for nearly 30 years. To tell tow points apart the hints to quasiparticle, not the shape, nature of fission isomers are discussed.

Citation Download Citation

Vladimir Makarenko "Neutron-induced spontaneously fissioning isomers", Proc. SPIE 2867, International Conference Neutrons in Research and Industry, (27 February 1997); https://doi.org/10.1117/12.267941

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