Tri And Rot Effects In Ternary Fission: What Can Be Learned?

Inducing fission by polarized neutrons allows studying subtle effects of the dynamics of the process. In the present experiments ternary fission of (235)U and (239)Pu was investigated with cold neutrons in the (n,f) reaction at the Institut Laue-Langevin, Grenoble. Asymmetries in the emission of ter...

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Bibliographic Details
Published in:AIP Conference Proceedings 2009-10, Vol.1224, p.338-349
Main Authors: Gonnenwein, F, Gagarski, A, Petrov, G, Guseva, I, Zavarukhina, T, Mutterer, M, Von Kalben, J, Kopatch, Yu, Tiourine, G, Trzaska, W, Sillanpaa, M, Soldner, T, Nesvizhevsky, V
Format: Article
Language:English
Subjects:
Angular distribution
Asymmetry
Cold neutrons
Decay
Dynamic tests
Dynamics
Emission
Fission
Mathematical analysis
Saddle points
Trajectories
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Summary:Inducing fission by polarized neutrons allows studying subtle effects of the dynamics of the process. In the present experiments ternary fission of (235)U and (239)Pu was investigated with cold neutrons in the (n,f) reaction at the Institut Laue-Langevin, Grenoble. Asymmetries in the emission of ternary particles were discovered by making use of the neutron spin flipping. It was found that two effects are interfering. There is first an asymmetry in the total yields of ternary particles having been called the TRI-effect. Second, it was observed that the angular distributions of ternary particles are shifted back and forth when flipping the neutron spin. This shift was named ROT effect. Guided by trajectory calculations of the three-body decay, the signs and sizes of the ROT effect are interpreted in terms of the K-numbers of the transition stales at the saddle point of fission.
ISSN:0094-243X