Investigations of fission characteristics and correlation effects

We review the experimental results on the P -even and P -odd angular correlations of fission fragments in the fission of the 235 U and 239 Pu nuclei induced by unpolarized and polarized resonance neutrons, and on the TRI and ROT effects in the ternary and binary fission of actinides induced by polarized thermal neutrons. Also reported are the measured yields of prompt and delayed neutrons per fission event. The experimental data are analyzed within a novel theoretical framework developed by the JINR—RNC KI Collaboration, whereby the reduction of the multidimensional phase space of fission fragments to the JπK -channel space is consistently validated and the role of resonance interference in the observed correlation effects is revealed.