Angular Correlations Between Fragment Spin and Prompt Neutron Evaporation in Spontaneous Fission of $^{252}$Cf: CORA-Demon Experiment

• Published in: AIP Conference Proceedings
• Main Authors: Prokhorova, E., Gönnenwein, F., Kopatch, Yu., Mutterer, M., Hanappe, F., Kinnard, V., Stuttgé, L., Dorvaux, O., Wollersheim, H.-J.
• Other Authors: Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Yu. E. Penionzhkevich, E. A. Cherepanov
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2006
• Subjects: spontaneous fission; cadmium; nuclei with mass number 220 or higher; angular correlation techniques; nuclear fragmentation; neutrons; 25.85.Ca; 25.70.Pq; 23.20.En; 21.10.Gv; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]; Cora; khanty
• Online Access: https://hal.in2p3.fr/in2p3-00156670; https://doi.org/10.1063/1.2746594

International audience 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 $^{252}$Cf 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.