Unified Mechanism behind the Appearance of T-Odd TRI and ROT Asymmetries in Actinide Fission Induced by Cold Polarized Neutrons

Journal Article · Sun Jul 15 04:00:00 EDT 2018 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778818040075· OSTI ID:22761714

Bunakov, V. E. ^[1]; Lubashevsky, D. E. ^[2]

---

1. National Research Center Kurchatov Institute, Petersburg Nuclear Physics Institute (Russian Federation)
2. Voronezh State University (Russian Federation)

Some shortcomings of the approaches that are used to describe T-odd ROT and TRI asymmetries in true ternary fission via reactions involving the emission of prescission alpha particles and which are based on employing the classical method of trajectory calculations are analyzed. These shortcomings are caused by the disregard of the interference between the fission widths of different sJ{sub s} neutron resonance states formed in the first well of the deformation potential of fissile compound nuclei. It is shown that the method used in some studies to determine T-odd TRI-asymmetries for prescission alpha particles is at odds with basic concepts of the generalizedmodel of the nucleus and approaches to constructing collective (for example, bending) vibrations of a fissile compound nucleus. Quantum-mechanical fission theory is generalized via employing a unified mechanism of formation of T-odd TRI and ROT asymmetries for prescission alpha particles and evaporated photons (neutrons). The proposed mechanism takes correctly into account the effect of quantum rotation of a fissile compound nucleus on the angular distributions of fission fragments and alpha particles for true ternary fission, as well as on the angular distribution of prompt photons (neutrons) emitted by fragments originating from the delayed fission of the aforementioned nuclei.

• OSTI ID: 22761714
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 4 Vol. 81; ISSN 1063-7788; ISSN PANUEO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDES
ALPHA PARTICLES
ANGULAR DISTRIBUTION
ASYMMETRY
BEAM BENDING MAGNETS
COMPOUND NUCLEI
ENERGY LEVELS
FISSION FRAGMENTS
NEUTRONS
NUCLEI
PHOTONS
QUANTUM MECHANICS
ROTATION
TERNARY FISSION
TRAJECTORIES
WIDTH