Angular Correlations Between Fragment Spin and Prompt Neutron Evaporation in Spontaneous Fission of 252Cf: CORA‐Demon Experiment

A novel method to search for the anisotropic emission of prompt neutrons in the center‐of‐mass system of fission fragments is presented. The anisotropy is conjectured to be due to the large spins of fission fragments are known to carry. Triple neutron‐ neutron‐fragment correlations in spontaneous fission of 252Cf were investigated in an exploratory experiment dubbed CORA‐DEMON experiment. Fission fragments were intercepted in a double ionization chamber while neutrons were spotted in 2 two‐dimensional cylindrical walls of Demon detectors with the target on the vertical cylinder axis. A new method of analysis of triple angular correlations between 2 neutrons and a fission fragment was applied. Preliminary results are reported.